[PATCH 0/3] perf: generate s390 syscall table and remove auditlibs dependency

[PATCH 0/3] perf: generate s390 syscall table and remove auditlibs dependency

[Hendrik Brueckner]

With the perf trace command you can specify system calls with wildcards.
To support this on s390, a system call table must be provided to perf.
Provide a script to create the perf system call table based on the defines
in arch/s390/include/uapi/asm/unistd.h (copied to tools/arch/s390/...).

Note that the first patch can be applied independent of the second and
third patch.  In case they need further discussion, please consider to
integrate the first one.

The second and third patches complete the work to remove the audit library
dependency for perf trace when an architecture supports system call tables.

Inspired by the generation of the system call tables, create a similar
approach to generate errno name mappings.  Introduce the errno_to_name()
function to replace audit_errno_to_name() in perf trace.  The third
patch changes the build process to build and run perf trace without
requiring the audit library anymore (for those architectures that have
system call table support).

Note: The patch set is based on the linux master branch (968edbd93c0cbb).


Hendrik Brueckner (3):
  perf s390: generate system call table from asm/unistd.h
  perf: introduce errno_to_name() function
  perf trace: no longer require auditlibs if syscall tables are present

 tools/arch/s390/include/uapi/asm/unistd.h        | 412 +++++++++++++++++++++++
 tools/perf/.gitignore                            |   1 +
 tools/perf/Makefile.config                       |  22 +-
 tools/perf/Makefile.perf                         |  12 +-
 tools/perf/arch/s390/Makefile                    |  21 ++
 tools/perf/arch/s390/entry/syscalls/mksyscalltbl |  36 ++
 tools/perf/builtin-help.c                        |   2 +-
 tools/perf/builtin-trace.c                       |  17 +-
 tools/perf/check-headers.sh                      |   1 +
 tools/perf/perf.c                                |   4 +-
 tools/perf/util/generate-cmdlist.sh              |   2 +-
 tools/perf/util/generate-errno-names.sh          |  32 ++
 tools/perf/util/syscalltbl.c                     |   4 +
 13 files changed, 553 insertions(+), 13 deletions(-)
 create mode 100644 tools/arch/s390/include/uapi/asm/unistd.h
 create mode 100755 tools/perf/arch/s390/entry/syscalls/mksyscalltbl
 create mode 100755 tools/perf/util/generate-errno-names.sh

-- 
1.8.3.1

[PATCH 1/3] perf s390: generate system call table from asm/unistd.h

[Hendrik Brueckner]

This should speed up accessing new system calls introduced with
the kernel rather than waiting for libaudit updates to include
them.

It also enables users to specify wildcards, for example,
perf trace -e 'open*'.

Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
---
 tools/arch/s390/include/uapi/asm/unistd.h        | 412 +++++++++++++++++++++++
 tools/perf/Makefile.config                       |  10 +-
 tools/perf/arch/s390/Makefile                    |  21 ++
 tools/perf/arch/s390/entry/syscalls/mksyscalltbl |  36 ++
 tools/perf/check-headers.sh                      |   1 +
 tools/perf/util/syscalltbl.c                     |   4 +
 6 files changed, 483 insertions(+), 1 deletion(-)
 create mode 100644 tools/arch/s390/include/uapi/asm/unistd.h
 create mode 100755 tools/perf/arch/s390/entry/syscalls/mksyscalltbl

diff --git a/tools/arch/s390/include/uapi/asm/unistd.h b/tools/arch/s390/include/uapi/asm/unistd.h
new file mode 100644
index 0000000..7251209
--- /dev/null
+++ b/tools/arch/s390/include/uapi/asm/unistd.h
@@ -0,0 +1,412 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ *  S390 version
+ *
+ *  Derived from "include/asm-i386/unistd.h"
+ */
+
+#ifndef _UAPI_ASM_S390_UNISTD_H_
+#define _UAPI_ASM_S390_UNISTD_H_
+
+/*
+ * This file contains the system call numbers.
+ */
+
+#define __NR_exit                 1
+#define __NR_fork                 2
+#define __NR_read                 3
+#define __NR_write                4
+#define __NR_open                 5
+#define __NR_close                6
+#define __NR_restart_syscall	  7
+#define __NR_creat                8
+#define __NR_link                 9
+#define __NR_unlink              10
+#define __NR_execve              11
+#define __NR_chdir               12
+#define __NR_mknod               14
+#define __NR_chmod               15
+#define __NR_lseek               19
+#define __NR_getpid              20
+#define __NR_mount               21
+#define __NR_umount              22
+#define __NR_ptrace              26
+#define __NR_alarm               27
+#define __NR_pause               29
+#define __NR_utime               30
+#define __NR_access              33
+#define __NR_nice                34
+#define __NR_sync                36
+#define __NR_kill                37
+#define __NR_rename              38
+#define __NR_mkdir               39
+#define __NR_rmdir               40
+#define __NR_dup                 41
+#define __NR_pipe                42
+#define __NR_times               43
+#define __NR_brk                 45
+#define __NR_signal              48
+#define __NR_acct                51
+#define __NR_umount2             52
+#define __NR_ioctl               54
+#define __NR_fcntl               55
+#define __NR_setpgid             57
+#define __NR_umask               60
+#define __NR_chroot              61
+#define __NR_ustat               62
+#define __NR_dup2                63
+#define __NR_getppid             64
+#define __NR_getpgrp             65
+#define __NR_setsid              66
+#define __NR_sigaction           67
+#define __NR_sigsuspend          72
+#define __NR_sigpending          73
+#define __NR_sethostname         74
+#define __NR_setrlimit           75
+#define __NR_getrusage           77
+#define __NR_gettimeofday        78
+#define __NR_settimeofday        79
+#define __NR_symlink             83
+#define __NR_readlink            85
+#define __NR_uselib              86
+#define __NR_swapon              87
+#define __NR_reboot              88
+#define __NR_readdir             89
+#define __NR_mmap                90
+#define __NR_munmap              91
+#define __NR_truncate            92
+#define __NR_ftruncate           93
+#define __NR_fchmod              94
+#define __NR_getpriority         96
+#define __NR_setpriority         97
+#define __NR_statfs              99
+#define __NR_fstatfs            100
+#define __NR_socketcall         102
+#define __NR_syslog             103
+#define __NR_setitimer          104
+#define __NR_getitimer          105
+#define __NR_stat               106
+#define __NR_lstat              107
+#define __NR_fstat              108
+#define __NR_lookup_dcookie     110
+#define __NR_vhangup            111
+#define __NR_idle               112
+#define __NR_wait4              114
+#define __NR_swapoff            115
+#define __NR_sysinfo            116
+#define __NR_ipc                117
+#define __NR_fsync              118
+#define __NR_sigreturn          119
+#define __NR_clone              120
+#define __NR_setdomainname      121
+#define __NR_uname              122
+#define __NR_adjtimex           124
+#define __NR_mprotect           125
+#define __NR_sigprocmask        126
+#define __NR_create_module      127
+#define __NR_init_module        128
+#define __NR_delete_module      129
+#define __NR_get_kernel_syms    130
+#define __NR_quotactl           131
+#define __NR_getpgid            132
+#define __NR_fchdir             133
+#define __NR_bdflush            134
+#define __NR_sysfs              135
+#define __NR_personality        136
+#define __NR_afs_syscall        137 /* Syscall for Andrew File System */
+#define __NR_getdents           141
+#define __NR_flock              143
+#define __NR_msync              144
+#define __NR_readv              145
+#define __NR_writev             146
+#define __NR_getsid             147
+#define __NR_fdatasync          148
+#define __NR__sysctl            149
+#define __NR_mlock              150
+#define __NR_munlock            151
+#define __NR_mlockall           152
+#define __NR_munlockall         153
+#define __NR_sched_setparam             154
+#define __NR_sched_getparam             155
+#define __NR_sched_setscheduler         156
+#define __NR_sched_getscheduler         157
+#define __NR_sched_yield                158
+#define __NR_sched_get_priority_max     159
+#define __NR_sched_get_priority_min     160
+#define __NR_sched_rr_get_interval      161
+#define __NR_nanosleep          162
+#define __NR_mremap             163
+#define __NR_query_module       167
+#define __NR_poll               168
+#define __NR_nfsservctl         169
+#define __NR_prctl              172
+#define __NR_rt_sigreturn       173
+#define __NR_rt_sigaction       174
+#define __NR_rt_sigprocmask     175
+#define __NR_rt_sigpending      176
+#define __NR_rt_sigtimedwait    177
+#define __NR_rt_sigqueueinfo    178
+#define __NR_rt_sigsuspend      179
+#define __NR_pread64            180
+#define __NR_pwrite64           181
+#define __NR_getcwd             183
+#define __NR_capget             184
+#define __NR_capset             185
+#define __NR_sigaltstack        186
+#define __NR_sendfile           187
+#define __NR_getpmsg		188
+#define __NR_putpmsg		189
+#define __NR_vfork		190
+#define __NR_pivot_root         217
+#define __NR_mincore            218
+#define __NR_madvise            219
+#define __NR_getdents64		220
+#define __NR_readahead		222
+#define __NR_setxattr		224
+#define __NR_lsetxattr		225
+#define __NR_fsetxattr		226
+#define __NR_getxattr		227
+#define __NR_lgetxattr		228
+#define __NR_fgetxattr		229
+#define __NR_listxattr		230
+#define __NR_llistxattr		231
+#define __NR_flistxattr		232
+#define __NR_removexattr	233
+#define __NR_lremovexattr	234
+#define __NR_fremovexattr	235
+#define __NR_gettid		236
+#define __NR_tkill		237
+#define __NR_futex		238
+#define __NR_sched_setaffinity	239
+#define __NR_sched_getaffinity	240
+#define __NR_tgkill		241
+/* Number 242 is reserved for tux */
+#define __NR_io_setup		243
+#define __NR_io_destroy		244
+#define __NR_io_getevents	245
+#define __NR_io_submit		246
+#define __NR_io_cancel		247
+#define __NR_exit_group		248
+#define __NR_epoll_create	249
+#define __NR_epoll_ctl		250
+#define __NR_epoll_wait		251
+#define __NR_set_tid_address	252
+#define __NR_fadvise64		253
+#define __NR_timer_create	254
+#define __NR_timer_settime	255
+#define __NR_timer_gettime	256
+#define __NR_timer_getoverrun	257
+#define __NR_timer_delete	258
+#define __NR_clock_settime	259
+#define __NR_clock_gettime	260
+#define __NR_clock_getres	261
+#define __NR_clock_nanosleep	262
+/* Number 263 is reserved for vserver */
+#define __NR_statfs64		265
+#define __NR_fstatfs64		266
+#define __NR_remap_file_pages	267
+#define __NR_mbind		268
+#define __NR_get_mempolicy	269
+#define __NR_set_mempolicy	270
+#define __NR_mq_open		271
+#define __NR_mq_unlink		272
+#define __NR_mq_timedsend	273
+#define __NR_mq_timedreceive	274
+#define __NR_mq_notify		275
+#define __NR_mq_getsetattr	276
+#define __NR_kexec_load		277
+#define __NR_add_key		278
+#define __NR_request_key	279
+#define __NR_keyctl		280
+#define __NR_waitid		281
+#define __NR_ioprio_set		282
+#define __NR_ioprio_get		283
+#define __NR_inotify_init	284
+#define __NR_inotify_add_watch	285
+#define __NR_inotify_rm_watch	286
+#define __NR_migrate_pages	287
+#define __NR_openat		288
+#define __NR_mkdirat		289
+#define __NR_mknodat		290
+#define __NR_fchownat		291
+#define __NR_futimesat		292
+#define __NR_unlinkat		294
+#define __NR_renameat		295
+#define __NR_linkat		296
+#define __NR_symlinkat		297
+#define __NR_readlinkat		298
+#define __NR_fchmodat		299
+#define __NR_faccessat		300
+#define __NR_pselect6		301
+#define __NR_ppoll		302
+#define __NR_unshare		303
+#define __NR_set_robust_list	304
+#define __NR_get_robust_list	305
+#define __NR_splice		306
+#define __NR_sync_file_range	307
+#define __NR_tee		308
+#define __NR_vmsplice		309
+#define __NR_move_pages		310
+#define __NR_getcpu		311
+#define __NR_epoll_pwait	312
+#define __NR_utimes		313
+#define __NR_fallocate		314
+#define __NR_utimensat		315
+#define __NR_signalfd		316
+#define __NR_timerfd		317
+#define __NR_eventfd		318
+#define __NR_timerfd_create	319
+#define __NR_timerfd_settime	320
+#define __NR_timerfd_gettime	321
+#define __NR_signalfd4		322
+#define __NR_eventfd2		323
+#define __NR_inotify_init1	324
+#define __NR_pipe2		325
+#define __NR_dup3		326
+#define __NR_epoll_create1	327
+#define	__NR_preadv		328
+#define	__NR_pwritev		329
+#define __NR_rt_tgsigqueueinfo	330
+#define __NR_perf_event_open	331
+#define __NR_fanotify_init	332
+#define __NR_fanotify_mark	333
+#define __NR_prlimit64		334
+#define __NR_name_to_handle_at	335
+#define __NR_open_by_handle_at	336
+#define __NR_clock_adjtime	337
+#define __NR_syncfs		338
+#define __NR_setns		339
+#define __NR_process_vm_readv	340
+#define __NR_process_vm_writev	341
+#define __NR_s390_runtime_instr 342
+#define __NR_kcmp		343
+#define __NR_finit_module	344
+#define __NR_sched_setattr	345
+#define __NR_sched_getattr	346
+#define __NR_renameat2		347
+#define __NR_seccomp		348
+#define __NR_getrandom		349
+#define __NR_memfd_create	350
+#define __NR_bpf		351
+#define __NR_s390_pci_mmio_write	352
+#define __NR_s390_pci_mmio_read		353
+#define __NR_execveat		354
+#define __NR_userfaultfd	355
+#define __NR_membarrier		356
+#define __NR_recvmmsg		357
+#define __NR_sendmmsg		358
+#define __NR_socket		359
+#define __NR_socketpair		360
+#define __NR_bind		361
+#define __NR_connect		362
+#define __NR_listen		363
+#define __NR_accept4		364
+#define __NR_getsockopt		365
+#define __NR_setsockopt		366
+#define __NR_getsockname	367
+#define __NR_getpeername	368
+#define __NR_sendto		369
+#define __NR_sendmsg		370
+#define __NR_recvfrom		371
+#define __NR_recvmsg		372
+#define __NR_shutdown		373
+#define __NR_mlock2		374
+#define __NR_copy_file_range	375
+#define __NR_preadv2		376
+#define __NR_pwritev2		377
+#define __NR_s390_guarded_storage	378
+#define __NR_statx		379
+#define __NR_s390_sthyi		380
+#define NR_syscalls 381
+
+/* 
+ * There are some system calls that are not present on 64 bit, some
+ * have a different name although they do the same (e.g. __NR_chown32
+ * is __NR_chown on 64 bit).
+ */
+#ifndef __s390x__
+
+#define __NR_time		 13
+#define __NR_lchown		 16
+#define __NR_setuid		 23
+#define __NR_getuid		 24
+#define __NR_stime		 25
+#define __NR_setgid		 46
+#define __NR_getgid		 47
+#define __NR_geteuid		 49
+#define __NR_getegid		 50
+#define __NR_setreuid		 70
+#define __NR_setregid		 71
+#define __NR_getrlimit		 76
+#define __NR_getgroups		 80
+#define __NR_setgroups		 81
+#define __NR_fchown		 95
+#define __NR_ioperm		101
+#define __NR_setfsuid		138
+#define __NR_setfsgid		139
+#define __NR__llseek		140
+#define __NR__newselect 	142
+#define __NR_setresuid		164
+#define __NR_getresuid		165
+#define __NR_setresgid		170
+#define __NR_getresgid		171
+#define __NR_chown		182
+#define __NR_ugetrlimit		191	/* SuS compliant getrlimit */
+#define __NR_mmap2		192
+#define __NR_truncate64		193
+#define __NR_ftruncate64	194
+#define __NR_stat64		195
+#define __NR_lstat64		196
+#define __NR_fstat64		197
+#define __NR_lchown32		198
+#define __NR_getuid32		199
+#define __NR_getgid32		200
+#define __NR_geteuid32		201
+#define __NR_getegid32		202
+#define __NR_setreuid32		203
+#define __NR_setregid32		204
+#define __NR_getgroups32	205
+#define __NR_setgroups32	206
+#define __NR_fchown32		207
+#define __NR_setresuid32	208
+#define __NR_getresuid32	209
+#define __NR_setresgid32	210
+#define __NR_getresgid32	211
+#define __NR_chown32		212
+#define __NR_setuid32		213
+#define __NR_setgid32		214
+#define __NR_setfsuid32		215
+#define __NR_setfsgid32		216
+#define __NR_fcntl64		221
+#define __NR_sendfile64		223
+#define __NR_fadvise64_64	264
+#define __NR_fstatat64		293
+
+#else
+
+#define __NR_select		142
+#define __NR_getrlimit		191	/* SuS compliant getrlimit */
+#define __NR_lchown  		198
+#define __NR_getuid  		199
+#define __NR_getgid  		200
+#define __NR_geteuid  		201
+#define __NR_getegid  		202
+#define __NR_setreuid  		203
+#define __NR_setregid  		204
+#define __NR_getgroups  	205
+#define __NR_setgroups  	206
+#define __NR_fchown  		207
+#define __NR_setresuid  	208
+#define __NR_getresuid  	209
+#define __NR_setresgid  	210
+#define __NR_getresgid  	211
+#define __NR_chown  		212
+#define __NR_setuid  		213
+#define __NR_setgid  		214
+#define __NR_setfsuid  		215
+#define __NR_setfsgid  		216
+#define __NR_newfstatat		293
+
+#endif
+
+#endif /* _UAPI_ASM_S390_UNISTD_H_ */
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ed65e82..ab16aab 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -22,6 +22,7 @@ include $(srctree)/tools/scripts/Makefile.arch
 $(call detected_var,SRCARCH)
 
 NO_PERF_REGS := 1
+NO_SYSCALL_TABLE := 1
 
 # Additional ARCH settings for ppc
 ifeq ($(SRCARCH),powerpc)
@@ -33,7 +34,8 @@ endif
 ifeq ($(SRCARCH),x86)
   $(call detected,CONFIG_X86)
   ifeq (${IS_64_BIT}, 1)
-    CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT -DHAVE_SYSCALL_TABLE -I$(OUTPUT)arch/x86/include/generated
+    NO_SYSCALL_TABLE := 0
+    CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT -I$(OUTPUT)arch/x86/include/generated
     ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
     LIBUNWIND_LIBS = -lunwind-x86_64 -lunwind -llzma
     $(call detected,CONFIG_X86_64)
@@ -55,12 +57,18 @@ endif
 
 ifeq ($(ARCH),s390)
   NO_PERF_REGS := 0
+  NO_SYSCALL_TABLE := 0
+  CFLAGS += -I$(OUTPUT)arch/s390/include/generated
 endif
 
 ifeq ($(NO_PERF_REGS),0)
   $(call detected,CONFIG_PERF_REGS)
 endif
 
+ifneq ($(NO_SYSCALL_TABLE),1)
+  CFLAGS += -DHAVE_SYSCALL_TABLE
+endif
+
 # So far there's only x86 and arm libdw unwind support merged in perf.
 # Disable it on all other architectures in case libdw unwind
 # support is detected in system. Add supported architectures
diff --git a/tools/perf/arch/s390/Makefile b/tools/perf/arch/s390/Makefile
index 21322e0..ce38831 100644
--- a/tools/perf/arch/s390/Makefile
+++ b/tools/perf/arch/s390/Makefile
@@ -2,3 +2,24 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 endif
 HAVE_KVM_STAT_SUPPORT := 1
+
+#
+# Syscall table generation for perf
+#
+
+out    := $(OUTPUT)arch/s390/include/generated/asm
+header := $(out)/syscalls_64.c
+sysdef := $(srctree)/tools/arch/s390/include/uapi/asm/unistd.h
+sysprf := $(srctree)/tools/perf/arch/s390/entry/syscalls/
+systbl := $(sysprf)/mksyscalltbl
+
+# Create output directory if not already present
+_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
+
+$(header): $(sysdef) $(systbl)
+	$(Q)$(SHELL) '$(systbl)' '$(CC)' $(sysdef) > $@
+
+clean::
+	$(call QUIET_CLEAN, s390) $(RM) $(header)
+
+archheaders: $(header)
diff --git a/tools/perf/arch/s390/entry/syscalls/mksyscalltbl b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl
new file mode 100755
index 0000000..7fa0d0a
--- /dev/null
+++ b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl
@@ -0,0 +1,36 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate system call table for perf
+#
+#
+# Copyright IBM Corp. 2017
+# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+#
+
+gcc=$1
+input=$2
+
+if ! test -r $input; then
+	echo "Could not read input file" >&2
+	exit 1
+fi
+
+create_table()
+{
+	local max_nr
+
+	echo 'static const char *syscalltbl_s390_64[] = {'
+	while read sc nr; do
+		printf '\t[%d] = "%s",\n' $nr $sc
+		max_nr=$nr
+	done
+	echo '};'
+	echo "#define SYSCALLTBL_S390_64_MAX_ID $max_nr"
+}
+
+
+$gcc -m64 -E -dM -x c  $input	       \
+	|sed -ne 's/^#define __NR_//p' \
+	|sort -t' ' -k2 -nu	       \
+	|create_table
diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
index 77406d2..23543c0 100755
--- a/tools/perf/check-headers.sh
+++ b/tools/perf/check-headers.sh
@@ -31,6 +31,7 @@ arch/powerpc/include/uapi/asm/kvm.h
 arch/s390/include/uapi/asm/kvm.h
 arch/s390/include/uapi/asm/kvm_perf.h
 arch/s390/include/uapi/asm/sie.h
+arch/s390/include/uapi/asm/unistd.h
 arch/arm/include/uapi/asm/kvm.h
 arch/arm64/include/uapi/asm/kvm.h
 include/asm-generic/bitops/arch_hweight.h
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index 6eea7cf..303bdb8 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -26,6 +26,10 @@
 #include <asm/syscalls_64.c>
 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
 static const char **syscalltbl_native = syscalltbl_x86_64;
+#elif defined(__s390x__)
+#include <asm/syscalls_64.c>
+const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
+static const char **syscalltbl_native = syscalltbl_s390_64;
 #endif
 
 struct syscall {
-- 
1.8.3.1

[PATCH 2/3] perf: introduce errno_to_name() function

[Hendrik Brueckner]

Introduce an errno_to_name() function to return the name of a
give errno number as string.

With this change, the dependency to libaudit can be removed for
architectures that support syscall tables.  Hence, remove the
audit_errno_to_name() call in builtin-trace.c and just link
util/syscalltbl.c against libaudit.  A follow-up commit could
then clean-up this dependency with respect to the syscall table.

The errno name strings are generated by util/generate-errno-names.sh
script and saved as util/errno-names.h.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
---
 tools/perf/.gitignore                   |  1 +
 tools/perf/Makefile.config              |  2 +-
 tools/perf/Makefile.perf                | 12 ++++++++++--
 tools/perf/builtin-trace.c              | 17 ++++++++++++++---
 tools/perf/util/generate-errno-names.sh | 32 ++++++++++++++++++++++++++++++++
 5 files changed, 58 insertions(+), 6 deletions(-)
 create mode 100755 tools/perf/util/generate-errno-names.sh

diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index 643cc4ba..4e022f9 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -14,6 +14,7 @@ perf*.1
 perf*.xml
 perf*.html
 common-cmds.h
+errno-names.h
 perf.data
 perf.data.old
 output.svg
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ab16aab..d8447b1 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -251,7 +251,7 @@ INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/
 
-# $(obj-perf)      for generated common-cmds.h
+# $(obj-perf)      for generated common-cmds.h and errno-names.h
 # $(obj-perf)/util for generated bison/flex headers
 ifneq ($(OUTPUT),)
 INC_FLAGS += -I$(obj-perf)/util
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 68cf136..82aed33d 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -518,6 +518,12 @@ $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt
 $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)
 	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@
 
+$(OUTPUT)util/errno-names.h: util/generate-errno-names.sh
+	$(QUIET_GEN). util/generate-errno-names.sh \
+	$(srctree)/include/uapi/asm-generic/errno-base.h \
+	$(srctree)/include/uapi/asm-generic/errno.h \
+	> $@+ && mv $@+ $@
+
 $(SCRIPTS) : % : %.sh
 	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'
 
@@ -565,7 +571,8 @@ prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioc
 	$(vhost_virtio_ioctl_array) \
 	$(madvise_behavior_array) \
 	$(perf_ioctl_array) \
-	$(prctl_option_array)
+	$(prctl_option_array) \
+	$(OUTPUT)util/errno-names.h
 
 $(OUTPUT)%.o: %.c prepare FORCE
 	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
@@ -847,7 +854,8 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
 		$(OUTPUT)$(kcmp_type_array) \
 		$(OUTPUT)$(vhost_virtio_ioctl_array) \
 		$(OUTPUT)$(perf_ioctl_array) \
-		$(OUTPUT)$(prctl_option_array)
+		$(OUTPUT)$(prctl_option_array) \
+		$(OUTPUT)util/errno-names.h
 	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
 
 #
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 84debdb..b7aef0f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -42,17 +42,16 @@
 #include "string2.h"
 #include "syscalltbl.h"
 #include "rb_resort.h"
+#include "util/errno-names.h"
 
 #include <errno.h>
 #include <inttypes.h>
-#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
 #include <poll.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <linux/err.h>
 #include <linux/filter.h>
-#include <linux/audit.h>
 #include <linux/kernel.h>
 #include <linux/random.h>
 #include <linux/stringify.h>
@@ -1659,6 +1658,18 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
 	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
 }
 
+static const char *errno_to_name(int err)
+{
+	switch (err) {
+#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
+	ALL_ERRNO_NAME_MAPPINGS
+#undef ONE_ERRNO_NAME
+	default:
+		return "(unknown)";
+		break;
+	};
+}
+
 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 			   union perf_event *event __maybe_unused,
 			   struct perf_sample *sample)
@@ -1729,7 +1740,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 errno_print: {
 		char bf[STRERR_BUFSIZE];
 		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
-			   *e = audit_errno_to_name(-ret);
+			   *e = errno_to_name(-ret);
 
 		fprintf(trace->output, ") = -1 %s %s", e, emsg);
 	}
diff --git a/tools/perf/util/generate-errno-names.sh b/tools/perf/util/generate-errno-names.sh
new file mode 100755
index 0000000..6c114a8
--- /dev/null
+++ b/tools/perf/util/generate-errno-names.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate errno names header file
+#
+# Copyright IBM Corp. 2017
+# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+
+infiles="$@"
+tmpfile=$(mktemp -t generate-errno-names.XXXXXXXXX)
+
+trap 'rm -f $tmpfile' 0
+
+grep -hE '^#define[[:blank:]]+([^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' $infiles \
+	|awk '{ print $2", "$3; }' \
+	|sort -t, -k2 -nu \
+	|sed -e 's/^/\tERRNO_NAME_MAP(/' -e 's/$/)/' \
+	>  $tmpfile
+
+cat <<EoHeader
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UTIL_ERRNO_NAMES_H
+#define _UTIL_ERRNO_NAMES_H
+
+#define ALL_ERRNO_NAME_MAPPINGS \\
+EoHeader
+head -n -1 $tmpfile |sed -e 's/$/ \\/'
+tail -1 $tmpfile
+
+cat <<EoFooter
+#endif	/* _UTIL_ERRNO_NAMES_H */
+EoFooter
-- 
1.8.3.1

[PATCH 3/3] perf trace: no longer require auditlibs if syscall tables are present

[Hendrik Brueckner]

Change the Makefile and build process to no longer require auditlibs
interfaces when the architecture provides system call tables.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
---
 tools/perf/Makefile.config          | 10 ++++++++--
 tools/perf/builtin-help.c           |  2 +-
 tools/perf/perf.c                   |  4 ++--
 tools/perf/util/generate-cmdlist.sh |  2 +-
 4 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index d8447b1..6a948bf 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -531,8 +531,14 @@ endif
 
 ifndef NO_LIBAUDIT
   ifneq ($(feature-libaudit), 1)
-    msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
-    NO_LIBAUDIT := 1
+    ifeq ($(NO_SYSCALL_TABLE), 1)
+      msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
+      NO_LIBAUDIT := 1
+    else
+      # With syscall table support, auditlibs are no longer required to build
+      # the trace tool.
+      $(call detected,CONFIG_AUDIT)
+    endif
   else
     CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
     EXTLIBS += -laudit
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index a0f7ed2..4aca13f 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -439,7 +439,7 @@ int cmd_help(int argc, const char **argv)
 #ifdef HAVE_LIBELF_SUPPORT
 		"probe",
 #endif
-#ifdef HAVE_LIBAUDIT_SUPPORT
+#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
 		"trace",
 #endif
 	NULL };
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 62b1351..1b3fc8e 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -73,7 +73,7 @@ struct cmd_struct {
 	{ "lock",	cmd_lock,	0 },
 	{ "kvm",	cmd_kvm,	0 },
 	{ "test",	cmd_test,	0 },
-#ifdef HAVE_LIBAUDIT_SUPPORT
+#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
 	{ "trace",	cmd_trace,	0 },
 #endif
 	{ "inject",	cmd_inject,	0 },
@@ -485,7 +485,7 @@ int main(int argc, const char **argv)
 		argv[0] = cmd;
 	}
 	if (strstarts(cmd, "trace")) {
-#ifdef HAVE_LIBAUDIT_SUPPORT
+#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
 		setup_path();
 		argv[0] = "trace";
 		return cmd_trace(argc, argv);
diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
index 9bbcec4..ff17920 100755
--- a/tools/perf/util/generate-cmdlist.sh
+++ b/tools/perf/util/generate-cmdlist.sh
@@ -38,7 +38,7 @@ do
 done
 echo "#endif /* HAVE_LIBELF_SUPPORT */"
 
-echo "#ifdef HAVE_LIBAUDIT_SUPPORT"
+echo "#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)"
 sed -n -e 's/^perf-\([^ 	]*\)[ 	].* audit*/\1/p' command-list.txt |
 sort |
 while read cmd
-- 
1.8.3.1

Re: [PATCH 2/3] fixup! perf: introduce errno_to_name() function

[Hendrik Brueckner]

Hi Arnaldo,

just looking through my posting and just need a fixup for one hunk.  Please
let me know whether I shall re-post the series again.  Sorry for this
inconvenience.

On Thu, Dec 07, 2017 at 09:28:00AM +0100, Hendrik Brueckner wrote:
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
[...]
> @@ -1659,6 +1658,18 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
>  	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
>  }
> 
> +static const char *errno_to_name(int err)
> +{
> +	switch (err) {
> +#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
> +	ALL_ERRNO_NAME_MAPPINGS
> +#undef ONE_ERRNO_NAME


diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b7aef0f..04af6a1 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1663,7 +1663,7 @@ static const char *errno_to_name(int err)
 	switch (err) {
 #define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
 	ALL_ERRNO_NAME_MAPPINGS
-#undef ONE_ERRNO_NAME
+#undef ERRNO_NAME_MAP
 	default:
 		return "(unknown)";
 		break;

Re: [PATCH 2/3] fixup! perf: introduce errno_to_name() function

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 09:37:17AM +0100, Hendrik Brueckner escreveu:
> Hi Arnaldo,
> 
> just looking through my posting and just need a fixup for one hunk.  Please
> let me know whether I shall re-post the series again.  Sorry for this
> inconvenience.

NP, in these cases please resend the affected patch with a v2 in the
subject line, i.e.:

Subject: [PATCH 2/3 v2] perf: introduce errno_to_name() function

Some other issues with that subject line, please check the differences:

Subject: [PATCH 2/3 v2] perf trace: Introduce errno_to_name()

Regards,

- Arnaldo
 
> On Thu, Dec 07, 2017 at 09:28:00AM +0100, Hendrik Brueckner wrote:
> > --- a/tools/perf/builtin-trace.c
> > +++ b/tools/perf/builtin-trace.c
> [...]
> > @@ -1659,6 +1658,18 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
> >  	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
> >  }
> > 
> > +static const char *errno_to_name(int err)
> > +{
> > +	switch (err) {
> > +#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
> > +	ALL_ERRNO_NAME_MAPPINGS
> > +#undef ONE_ERRNO_NAME
> 
> 
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index b7aef0f..04af6a1 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -1663,7 +1663,7 @@ static const char *errno_to_name(int err)
>  	switch (err) {
>  #define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
>  	ALL_ERRNO_NAME_MAPPINGS
> -#undef ONE_ERRNO_NAME
> +#undef ERRNO_NAME_MAP
>  	default:
>  		return "(unknown)";
>  		break;

[PATCH 2/3 v2] perf trace: Introduce errno_to_name()

[Hendrik Brueckner]

Introduce an errno_to_name() function to return the name of a
give errno number as string.

With this change, the dependency to libaudit can be removed for
architectures that support syscall tables.  Hence, remove the
audit_errno_to_name() call in builtin-trace.c and just link
util/syscalltbl.c against libaudit.  A follow-up commit could
then clean-up this dependency with respect to the syscall table.

The errno name strings are generated by util/generate-errno-names.sh
script and saved as util/errno-names.h.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
---
 tools/perf/.gitignore                   |  1 +
 tools/perf/Makefile.config              |  2 +-
 tools/perf/Makefile.perf                | 12 ++++++++++--
 tools/perf/builtin-trace.c              | 17 ++++++++++++++---
 tools/perf/util/generate-errno-names.sh | 32 ++++++++++++++++++++++++++++++++
 5 files changed, 58 insertions(+), 6 deletions(-)
 create mode 100755 tools/perf/util/generate-errno-names.sh

diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index 643cc4ba..4e022f9 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -14,6 +14,7 @@ perf*.1
 perf*.xml
 perf*.html
 common-cmds.h
+errno-names.h
 perf.data
 perf.data.old
 output.svg
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ab16aab..d8447b1 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -251,7 +251,7 @@ INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/
 
-# $(obj-perf)      for generated common-cmds.h
+# $(obj-perf)      for generated common-cmds.h and errno-names.h
 # $(obj-perf)/util for generated bison/flex headers
 ifneq ($(OUTPUT),)
 INC_FLAGS += -I$(obj-perf)/util
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 68cf136..82aed33d 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -518,6 +518,12 @@ $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt
 $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)
 	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@
 
+$(OUTPUT)util/errno-names.h: util/generate-errno-names.sh
+	$(QUIET_GEN). util/generate-errno-names.sh \
+	$(srctree)/include/uapi/asm-generic/errno-base.h \
+	$(srctree)/include/uapi/asm-generic/errno.h \
+	> $@+ && mv $@+ $@
+
 $(SCRIPTS) : % : %.sh
 	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'
 
@@ -565,7 +571,8 @@ prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioc
 	$(vhost_virtio_ioctl_array) \
 	$(madvise_behavior_array) \
 	$(perf_ioctl_array) \
-	$(prctl_option_array)
+	$(prctl_option_array) \
+	$(OUTPUT)util/errno-names.h
 
 $(OUTPUT)%.o: %.c prepare FORCE
 	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
@@ -847,7 +854,8 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
 		$(OUTPUT)$(kcmp_type_array) \
 		$(OUTPUT)$(vhost_virtio_ioctl_array) \
 		$(OUTPUT)$(perf_ioctl_array) \
-		$(OUTPUT)$(prctl_option_array)
+		$(OUTPUT)$(prctl_option_array) \
+		$(OUTPUT)util/errno-names.h
 	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
 
 #
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 84debdb..04af6a1 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -42,17 +42,16 @@
 #include "string2.h"
 #include "syscalltbl.h"
 #include "rb_resort.h"
+#include "util/errno-names.h"
 
 #include <errno.h>
 #include <inttypes.h>
-#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
 #include <poll.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <linux/err.h>
 #include <linux/filter.h>
-#include <linux/audit.h>
 #include <linux/kernel.h>
 #include <linux/random.h>
 #include <linux/stringify.h>
@@ -1659,6 +1658,18 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
 	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
 }
 
+static const char *errno_to_name(int err)
+{
+	switch (err) {
+#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
+	ALL_ERRNO_NAME_MAPPINGS
+#undef ERRNO_NAME_MAP
+	default:
+		return "(unknown)";
+		break;
+	};
+}
+
 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 			   union perf_event *event __maybe_unused,
 			   struct perf_sample *sample)
@@ -1729,7 +1740,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 errno_print: {
 		char bf[STRERR_BUFSIZE];
 		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
-			   *e = audit_errno_to_name(-ret);
+			   *e = errno_to_name(-ret);
 
 		fprintf(trace->output, ") = -1 %s %s", e, emsg);
 	}
diff --git a/tools/perf/util/generate-errno-names.sh b/tools/perf/util/generate-errno-names.sh
new file mode 100755
index 0000000..6c114a8
--- /dev/null
+++ b/tools/perf/util/generate-errno-names.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate errno names header file
+#
+# Copyright IBM Corp. 2017
+# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+
+infiles="$@"
+tmpfile=$(mktemp -t generate-errno-names.XXXXXXXXX)
+
+trap 'rm -f $tmpfile' 0
+
+grep -hE '^#define[[:blank:]]+([^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' $infiles \
+	|awk '{ print $2", "$3; }' \
+	|sort -t, -k2 -nu \
+	|sed -e 's/^/\tERRNO_NAME_MAP(/' -e 's/$/)/' \
+	>  $tmpfile
+
+cat <<EoHeader
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UTIL_ERRNO_NAMES_H
+#define _UTIL_ERRNO_NAMES_H
+
+#define ALL_ERRNO_NAME_MAPPINGS \\
+EoHeader
+head -n -1 $tmpfile |sed -e 's/$/ \\/'
+tail -1 $tmpfile
+
+cat <<EoFooter
+#endif	/* _UTIL_ERRNO_NAMES_H */
+EoFooter
-- 
1.8.3.1

Re: [PATCH 0/3] perf: generate s390 syscall table and remove auditlibs dependency

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 09:27:58AM +0100, Hendrik Brueckner escreveu:
> With the perf trace command you can specify system calls with wildcards.
> To support this on s390, a system call table must be provided to perf.
> Provide a script to create the perf system call table based on the defines
> in arch/s390/include/uapi/asm/unistd.h (copied to tools/arch/s390/...).
> 
> Note that the first patch can be applied independent of the second and
> third patch.  In case they need further discussion, please consider to
> integrate the first one.
> 
> The second and third patches complete the work to remove the audit library
> dependency for perf trace when an architecture supports system call tables.
> 
> Inspired by the generation of the system call tables, create a similar
> approach to generate errno name mappings.  Introduce the errno_to_name()
> function to replace audit_errno_to_name() in perf trace.  The third
> patch changes the build process to build and run perf trace without
> requiring the audit library anymore (for those architectures that have
> system call table support).

Excellent!

I'm reviewing this now, will take care of that fixup.

This should make the goal of doing a

'perf trace -i perf.data.from.other.arch'

Use the right conversion tables, allowing for instance to get a
perf.data file generated by 'perf trace record' and have it decoded
properly on a machine of a different arch, i.e. record on s390, use
'perf trace -i' to decoded it on x86_64 :-)

- Arnaldo
 
> Note: The patch set is based on the linux master branch (968edbd93c0cbb).

Please try this in the future using my perf/core branch, where bleeding
edge stuff gets developed, I'll see if something doesn't apply.

- Arnaldo
 
> 
> Hendrik Brueckner (3):
>   perf s390: generate system call table from asm/unistd.h
>   perf: introduce errno_to_name() function
>   perf trace: no longer require auditlibs if syscall tables are present
> 
>  tools/arch/s390/include/uapi/asm/unistd.h        | 412 +++++++++++++++++++++++
>  tools/perf/.gitignore                            |   1 +
>  tools/perf/Makefile.config                       |  22 +-
>  tools/perf/Makefile.perf                         |  12 +-
>  tools/perf/arch/s390/Makefile                    |  21 ++
>  tools/perf/arch/s390/entry/syscalls/mksyscalltbl |  36 ++
>  tools/perf/builtin-help.c                        |   2 +-
>  tools/perf/builtin-trace.c                       |  17 +-
>  tools/perf/check-headers.sh                      |   1 +
>  tools/perf/perf.c                                |   4 +-
>  tools/perf/util/generate-cmdlist.sh              |   2 +-
>  tools/perf/util/generate-errno-names.sh          |  32 ++
>  tools/perf/util/syscalltbl.c                     |   4 +
>  13 files changed, 553 insertions(+), 13 deletions(-)
>  create mode 100644 tools/arch/s390/include/uapi/asm/unistd.h
>  create mode 100755 tools/perf/arch/s390/entry/syscalls/mksyscalltbl
>  create mode 100755 tools/perf/util/generate-errno-names.sh
> 
> -- 
> 1.8.3.1

Re: [PATCH 1/3] perf s390: generate system call table from asm/unistd.h

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 09:27:59AM +0100, Hendrik Brueckner escreveu:
> This should speed up accessing new system calls introduced with
> the kernel rather than waiting for libaudit updates to include
> them.

So, this needs to be split in multiple patches, one grabbing the
tools/arch/s390/include/uapi/asm/unistd.h copy and adding it to
check-headers.sh (cool, you did it! :))

I'll take a stab at splitting it here.
 
> It also enables users to specify wildcards, for example,
> perf trace -e 'open*'.
> 
> Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> ---
>  tools/arch/s390/include/uapi/asm/unistd.h        | 412 +++++++++++++++++++++++
>  tools/perf/Makefile.config                       |  10 +-
>  tools/perf/arch/s390/Makefile                    |  21 ++
>  tools/perf/arch/s390/entry/syscalls/mksyscalltbl |  36 ++
>  tools/perf/check-headers.sh                      |   1 +
>  tools/perf/util/syscalltbl.c                     |   4 +
>  6 files changed, 483 insertions(+), 1 deletion(-)
>  create mode 100644 tools/arch/s390/include/uapi/asm/unistd.h
>  create mode 100755 tools/perf/arch/s390/entry/syscalls/mksyscalltbl
> 
> diff --git a/tools/arch/s390/include/uapi/asm/unistd.h b/tools/arch/s390/include/uapi/asm/unistd.h
> new file mode 100644
> index 0000000..7251209
> --- /dev/null
> +++ b/tools/arch/s390/include/uapi/asm/unistd.h
> @@ -0,0 +1,412 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +/*
> + *  S390 version
> + *
> + *  Derived from "include/asm-i386/unistd.h"
> + */
> +
> +#ifndef _UAPI_ASM_S390_UNISTD_H_
> +#define _UAPI_ASM_S390_UNISTD_H_
> +
> +/*
> + * This file contains the system call numbers.
> + */
> +
> +#define __NR_exit                 1
> +#define __NR_fork                 2
> +#define __NR_read                 3
> +#define __NR_write                4
> +#define __NR_open                 5
> +#define __NR_close                6
> +#define __NR_restart_syscall	  7
> +#define __NR_creat                8
> +#define __NR_link                 9
> +#define __NR_unlink              10
> +#define __NR_execve              11
> +#define __NR_chdir               12
> +#define __NR_mknod               14
> +#define __NR_chmod               15
> +#define __NR_lseek               19
> +#define __NR_getpid              20
> +#define __NR_mount               21
> +#define __NR_umount              22
> +#define __NR_ptrace              26
> +#define __NR_alarm               27
> +#define __NR_pause               29
> +#define __NR_utime               30
> +#define __NR_access              33
> +#define __NR_nice                34
> +#define __NR_sync                36
> +#define __NR_kill                37
> +#define __NR_rename              38
> +#define __NR_mkdir               39
> +#define __NR_rmdir               40
> +#define __NR_dup                 41
> +#define __NR_pipe                42
> +#define __NR_times               43
> +#define __NR_brk                 45
> +#define __NR_signal              48
> +#define __NR_acct                51
> +#define __NR_umount2             52
> +#define __NR_ioctl               54
> +#define __NR_fcntl               55
> +#define __NR_setpgid             57
> +#define __NR_umask               60
> +#define __NR_chroot              61
> +#define __NR_ustat               62
> +#define __NR_dup2                63
> +#define __NR_getppid             64
> +#define __NR_getpgrp             65
> +#define __NR_setsid              66
> +#define __NR_sigaction           67
> +#define __NR_sigsuspend          72
> +#define __NR_sigpending          73
> +#define __NR_sethostname         74
> +#define __NR_setrlimit           75
> +#define __NR_getrusage           77
> +#define __NR_gettimeofday        78
> +#define __NR_settimeofday        79
> +#define __NR_symlink             83
> +#define __NR_readlink            85
> +#define __NR_uselib              86
> +#define __NR_swapon              87
> +#define __NR_reboot              88
> +#define __NR_readdir             89
> +#define __NR_mmap                90
> +#define __NR_munmap              91
> +#define __NR_truncate            92
> +#define __NR_ftruncate           93
> +#define __NR_fchmod              94
> +#define __NR_getpriority         96
> +#define __NR_setpriority         97
> +#define __NR_statfs              99
> +#define __NR_fstatfs            100
> +#define __NR_socketcall         102
> +#define __NR_syslog             103
> +#define __NR_setitimer          104
> +#define __NR_getitimer          105
> +#define __NR_stat               106
> +#define __NR_lstat              107
> +#define __NR_fstat              108
> +#define __NR_lookup_dcookie     110
> +#define __NR_vhangup            111
> +#define __NR_idle               112
> +#define __NR_wait4              114
> +#define __NR_swapoff            115
> +#define __NR_sysinfo            116
> +#define __NR_ipc                117
> +#define __NR_fsync              118
> +#define __NR_sigreturn          119
> +#define __NR_clone              120
> +#define __NR_setdomainname      121
> +#define __NR_uname              122
> +#define __NR_adjtimex           124
> +#define __NR_mprotect           125
> +#define __NR_sigprocmask        126
> +#define __NR_create_module      127
> +#define __NR_init_module        128
> +#define __NR_delete_module      129
> +#define __NR_get_kernel_syms    130
> +#define __NR_quotactl           131
> +#define __NR_getpgid            132
> +#define __NR_fchdir             133
> +#define __NR_bdflush            134
> +#define __NR_sysfs              135
> +#define __NR_personality        136
> +#define __NR_afs_syscall        137 /* Syscall for Andrew File System */
> +#define __NR_getdents           141
> +#define __NR_flock              143
> +#define __NR_msync              144
> +#define __NR_readv              145
> +#define __NR_writev             146
> +#define __NR_getsid             147
> +#define __NR_fdatasync          148
> +#define __NR__sysctl            149
> +#define __NR_mlock              150
> +#define __NR_munlock            151
> +#define __NR_mlockall           152
> +#define __NR_munlockall         153
> +#define __NR_sched_setparam             154
> +#define __NR_sched_getparam             155
> +#define __NR_sched_setscheduler         156
> +#define __NR_sched_getscheduler         157
> +#define __NR_sched_yield                158
> +#define __NR_sched_get_priority_max     159
> +#define __NR_sched_get_priority_min     160
> +#define __NR_sched_rr_get_interval      161
> +#define __NR_nanosleep          162
> +#define __NR_mremap             163
> +#define __NR_query_module       167
> +#define __NR_poll               168
> +#define __NR_nfsservctl         169
> +#define __NR_prctl              172
> +#define __NR_rt_sigreturn       173
> +#define __NR_rt_sigaction       174
> +#define __NR_rt_sigprocmask     175
> +#define __NR_rt_sigpending      176
> +#define __NR_rt_sigtimedwait    177
> +#define __NR_rt_sigqueueinfo    178
> +#define __NR_rt_sigsuspend      179
> +#define __NR_pread64            180
> +#define __NR_pwrite64           181
> +#define __NR_getcwd             183
> +#define __NR_capget             184
> +#define __NR_capset             185
> +#define __NR_sigaltstack        186
> +#define __NR_sendfile           187
> +#define __NR_getpmsg		188
> +#define __NR_putpmsg		189
> +#define __NR_vfork		190
> +#define __NR_pivot_root         217
> +#define __NR_mincore            218
> +#define __NR_madvise            219
> +#define __NR_getdents64		220
> +#define __NR_readahead		222
> +#define __NR_setxattr		224
> +#define __NR_lsetxattr		225
> +#define __NR_fsetxattr		226
> +#define __NR_getxattr		227
> +#define __NR_lgetxattr		228
> +#define __NR_fgetxattr		229
> +#define __NR_listxattr		230
> +#define __NR_llistxattr		231
> +#define __NR_flistxattr		232
> +#define __NR_removexattr	233
> +#define __NR_lremovexattr	234
> +#define __NR_fremovexattr	235
> +#define __NR_gettid		236
> +#define __NR_tkill		237
> +#define __NR_futex		238
> +#define __NR_sched_setaffinity	239
> +#define __NR_sched_getaffinity	240
> +#define __NR_tgkill		241
> +/* Number 242 is reserved for tux */
> +#define __NR_io_setup		243
> +#define __NR_io_destroy		244
> +#define __NR_io_getevents	245
> +#define __NR_io_submit		246
> +#define __NR_io_cancel		247
> +#define __NR_exit_group		248
> +#define __NR_epoll_create	249
> +#define __NR_epoll_ctl		250
> +#define __NR_epoll_wait		251
> +#define __NR_set_tid_address	252
> +#define __NR_fadvise64		253
> +#define __NR_timer_create	254
> +#define __NR_timer_settime	255
> +#define __NR_timer_gettime	256
> +#define __NR_timer_getoverrun	257
> +#define __NR_timer_delete	258
> +#define __NR_clock_settime	259
> +#define __NR_clock_gettime	260
> +#define __NR_clock_getres	261
> +#define __NR_clock_nanosleep	262
> +/* Number 263 is reserved for vserver */
> +#define __NR_statfs64		265
> +#define __NR_fstatfs64		266
> +#define __NR_remap_file_pages	267
> +#define __NR_mbind		268
> +#define __NR_get_mempolicy	269
> +#define __NR_set_mempolicy	270
> +#define __NR_mq_open		271
> +#define __NR_mq_unlink		272
> +#define __NR_mq_timedsend	273
> +#define __NR_mq_timedreceive	274
> +#define __NR_mq_notify		275
> +#define __NR_mq_getsetattr	276
> +#define __NR_kexec_load		277
> +#define __NR_add_key		278
> +#define __NR_request_key	279
> +#define __NR_keyctl		280
> +#define __NR_waitid		281
> +#define __NR_ioprio_set		282
> +#define __NR_ioprio_get		283
> +#define __NR_inotify_init	284
> +#define __NR_inotify_add_watch	285
> +#define __NR_inotify_rm_watch	286
> +#define __NR_migrate_pages	287
> +#define __NR_openat		288
> +#define __NR_mkdirat		289
> +#define __NR_mknodat		290
> +#define __NR_fchownat		291
> +#define __NR_futimesat		292
> +#define __NR_unlinkat		294
> +#define __NR_renameat		295
> +#define __NR_linkat		296
> +#define __NR_symlinkat		297
> +#define __NR_readlinkat		298
> +#define __NR_fchmodat		299
> +#define __NR_faccessat		300
> +#define __NR_pselect6		301
> +#define __NR_ppoll		302
> +#define __NR_unshare		303
> +#define __NR_set_robust_list	304
> +#define __NR_get_robust_list	305
> +#define __NR_splice		306
> +#define __NR_sync_file_range	307
> +#define __NR_tee		308
> +#define __NR_vmsplice		309
> +#define __NR_move_pages		310
> +#define __NR_getcpu		311
> +#define __NR_epoll_pwait	312
> +#define __NR_utimes		313
> +#define __NR_fallocate		314
> +#define __NR_utimensat		315
> +#define __NR_signalfd		316
> +#define __NR_timerfd		317
> +#define __NR_eventfd		318
> +#define __NR_timerfd_create	319
> +#define __NR_timerfd_settime	320
> +#define __NR_timerfd_gettime	321
> +#define __NR_signalfd4		322
> +#define __NR_eventfd2		323
> +#define __NR_inotify_init1	324
> +#define __NR_pipe2		325
> +#define __NR_dup3		326
> +#define __NR_epoll_create1	327
> +#define	__NR_preadv		328
> +#define	__NR_pwritev		329
> +#define __NR_rt_tgsigqueueinfo	330
> +#define __NR_perf_event_open	331
> +#define __NR_fanotify_init	332
> +#define __NR_fanotify_mark	333
> +#define __NR_prlimit64		334
> +#define __NR_name_to_handle_at	335
> +#define __NR_open_by_handle_at	336
> +#define __NR_clock_adjtime	337
> +#define __NR_syncfs		338
> +#define __NR_setns		339
> +#define __NR_process_vm_readv	340
> +#define __NR_process_vm_writev	341
> +#define __NR_s390_runtime_instr 342
> +#define __NR_kcmp		343
> +#define __NR_finit_module	344
> +#define __NR_sched_setattr	345
> +#define __NR_sched_getattr	346
> +#define __NR_renameat2		347
> +#define __NR_seccomp		348
> +#define __NR_getrandom		349
> +#define __NR_memfd_create	350
> +#define __NR_bpf		351
> +#define __NR_s390_pci_mmio_write	352
> +#define __NR_s390_pci_mmio_read		353
> +#define __NR_execveat		354
> +#define __NR_userfaultfd	355
> +#define __NR_membarrier		356
> +#define __NR_recvmmsg		357
> +#define __NR_sendmmsg		358
> +#define __NR_socket		359
> +#define __NR_socketpair		360
> +#define __NR_bind		361
> +#define __NR_connect		362
> +#define __NR_listen		363
> +#define __NR_accept4		364
> +#define __NR_getsockopt		365
> +#define __NR_setsockopt		366
> +#define __NR_getsockname	367
> +#define __NR_getpeername	368
> +#define __NR_sendto		369
> +#define __NR_sendmsg		370
> +#define __NR_recvfrom		371
> +#define __NR_recvmsg		372
> +#define __NR_shutdown		373
> +#define __NR_mlock2		374
> +#define __NR_copy_file_range	375
> +#define __NR_preadv2		376
> +#define __NR_pwritev2		377
> +#define __NR_s390_guarded_storage	378
> +#define __NR_statx		379
> +#define __NR_s390_sthyi		380
> +#define NR_syscalls 381
> +
> +/* 
> + * There are some system calls that are not present on 64 bit, some
> + * have a different name although they do the same (e.g. __NR_chown32
> + * is __NR_chown on 64 bit).
> + */
> +#ifndef __s390x__
> +
> +#define __NR_time		 13
> +#define __NR_lchown		 16
> +#define __NR_setuid		 23
> +#define __NR_getuid		 24
> +#define __NR_stime		 25
> +#define __NR_setgid		 46
> +#define __NR_getgid		 47
> +#define __NR_geteuid		 49
> +#define __NR_getegid		 50
> +#define __NR_setreuid		 70
> +#define __NR_setregid		 71
> +#define __NR_getrlimit		 76
> +#define __NR_getgroups		 80
> +#define __NR_setgroups		 81
> +#define __NR_fchown		 95
> +#define __NR_ioperm		101
> +#define __NR_setfsuid		138
> +#define __NR_setfsgid		139
> +#define __NR__llseek		140
> +#define __NR__newselect 	142
> +#define __NR_setresuid		164
> +#define __NR_getresuid		165
> +#define __NR_setresgid		170
> +#define __NR_getresgid		171
> +#define __NR_chown		182
> +#define __NR_ugetrlimit		191	/* SuS compliant getrlimit */
> +#define __NR_mmap2		192
> +#define __NR_truncate64		193
> +#define __NR_ftruncate64	194
> +#define __NR_stat64		195
> +#define __NR_lstat64		196
> +#define __NR_fstat64		197
> +#define __NR_lchown32		198
> +#define __NR_getuid32		199
> +#define __NR_getgid32		200
> +#define __NR_geteuid32		201
> +#define __NR_getegid32		202
> +#define __NR_setreuid32		203
> +#define __NR_setregid32		204
> +#define __NR_getgroups32	205
> +#define __NR_setgroups32	206
> +#define __NR_fchown32		207
> +#define __NR_setresuid32	208
> +#define __NR_getresuid32	209
> +#define __NR_setresgid32	210
> +#define __NR_getresgid32	211
> +#define __NR_chown32		212
> +#define __NR_setuid32		213
> +#define __NR_setgid32		214
> +#define __NR_setfsuid32		215
> +#define __NR_setfsgid32		216
> +#define __NR_fcntl64		221
> +#define __NR_sendfile64		223
> +#define __NR_fadvise64_64	264
> +#define __NR_fstatat64		293
> +
> +#else
> +
> +#define __NR_select		142
> +#define __NR_getrlimit		191	/* SuS compliant getrlimit */
> +#define __NR_lchown  		198
> +#define __NR_getuid  		199
> +#define __NR_getgid  		200
> +#define __NR_geteuid  		201
> +#define __NR_getegid  		202
> +#define __NR_setreuid  		203
> +#define __NR_setregid  		204
> +#define __NR_getgroups  	205
> +#define __NR_setgroups  	206
> +#define __NR_fchown  		207
> +#define __NR_setresuid  	208
> +#define __NR_getresuid  	209
> +#define __NR_setresgid  	210
> +#define __NR_getresgid  	211
> +#define __NR_chown  		212
> +#define __NR_setuid  		213
> +#define __NR_setgid  		214
> +#define __NR_setfsuid  		215
> +#define __NR_setfsgid  		216
> +#define __NR_newfstatat		293
> +
> +#endif
> +
> +#endif /* _UAPI_ASM_S390_UNISTD_H_ */
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index ed65e82..ab16aab 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -22,6 +22,7 @@ include $(srctree)/tools/scripts/Makefile.arch
>  $(call detected_var,SRCARCH)
>  
>  NO_PERF_REGS := 1
> +NO_SYSCALL_TABLE := 1
>  
>  # Additional ARCH settings for ppc
>  ifeq ($(SRCARCH),powerpc)
> @@ -33,7 +34,8 @@ endif
>  ifeq ($(SRCARCH),x86)
>    $(call detected,CONFIG_X86)
>    ifeq (${IS_64_BIT}, 1)
> -    CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT -DHAVE_SYSCALL_TABLE -I$(OUTPUT)arch/x86/include/generated
> +    NO_SYSCALL_TABLE := 0
> +    CFLAGS += -DHAVE_ARCH_X86_64_SUPPORT -I$(OUTPUT)arch/x86/include/generated
>      ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
>      LIBUNWIND_LIBS = -lunwind-x86_64 -lunwind -llzma
>      $(call detected,CONFIG_X86_64)
> @@ -55,12 +57,18 @@ endif
>  
>  ifeq ($(ARCH),s390)
>    NO_PERF_REGS := 0
> +  NO_SYSCALL_TABLE := 0
> +  CFLAGS += -I$(OUTPUT)arch/s390/include/generated
>  endif
>  
>  ifeq ($(NO_PERF_REGS),0)
>    $(call detected,CONFIG_PERF_REGS)
>  endif
>  
> +ifneq ($(NO_SYSCALL_TABLE),1)
> +  CFLAGS += -DHAVE_SYSCALL_TABLE
> +endif
> +
>  # So far there's only x86 and arm libdw unwind support merged in perf.
>  # Disable it on all other architectures in case libdw unwind
>  # support is detected in system. Add supported architectures
> diff --git a/tools/perf/arch/s390/Makefile b/tools/perf/arch/s390/Makefile
> index 21322e0..ce38831 100644
> --- a/tools/perf/arch/s390/Makefile
> +++ b/tools/perf/arch/s390/Makefile
> @@ -2,3 +2,24 @@ ifndef NO_DWARF
>  PERF_HAVE_DWARF_REGS := 1
>  endif
>  HAVE_KVM_STAT_SUPPORT := 1
> +
> +#
> +# Syscall table generation for perf
> +#
> +
> +out    := $(OUTPUT)arch/s390/include/generated/asm
> +header := $(out)/syscalls_64.c
> +sysdef := $(srctree)/tools/arch/s390/include/uapi/asm/unistd.h
> +sysprf := $(srctree)/tools/perf/arch/s390/entry/syscalls/
> +systbl := $(sysprf)/mksyscalltbl
> +
> +# Create output directory if not already present
> +_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
> +
> +$(header): $(sysdef) $(systbl)
> +	$(Q)$(SHELL) '$(systbl)' '$(CC)' $(sysdef) > $@
> +
> +clean::
> +	$(call QUIET_CLEAN, s390) $(RM) $(header)
> +
> +archheaders: $(header)
> diff --git a/tools/perf/arch/s390/entry/syscalls/mksyscalltbl b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl
> new file mode 100755
> index 0000000..7fa0d0a
> --- /dev/null
> +++ b/tools/perf/arch/s390/entry/syscalls/mksyscalltbl
> @@ -0,0 +1,36 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Generate system call table for perf
> +#
> +#
> +# Copyright IBM Corp. 2017
> +# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> +#
> +
> +gcc=$1
> +input=$2
> +
> +if ! test -r $input; then
> +	echo "Could not read input file" >&2
> +	exit 1
> +fi
> +
> +create_table()
> +{
> +	local max_nr
> +
> +	echo 'static const char *syscalltbl_s390_64[] = {'
> +	while read sc nr; do
> +		printf '\t[%d] = "%s",\n' $nr $sc
> +		max_nr=$nr
> +	done
> +	echo '};'
> +	echo "#define SYSCALLTBL_S390_64_MAX_ID $max_nr"
> +}
> +
> +
> +$gcc -m64 -E -dM -x c  $input	       \
> +	|sed -ne 's/^#define __NR_//p' \
> +	|sort -t' ' -k2 -nu	       \
> +	|create_table
> diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
> index 77406d2..23543c0 100755
> --- a/tools/perf/check-headers.sh
> +++ b/tools/perf/check-headers.sh
> @@ -31,6 +31,7 @@ arch/powerpc/include/uapi/asm/kvm.h
>  arch/s390/include/uapi/asm/kvm.h
>  arch/s390/include/uapi/asm/kvm_perf.h
>  arch/s390/include/uapi/asm/sie.h
> +arch/s390/include/uapi/asm/unistd.h
>  arch/arm/include/uapi/asm/kvm.h
>  arch/arm64/include/uapi/asm/kvm.h
>  include/asm-generic/bitops/arch_hweight.h
> diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
> index 6eea7cf..303bdb8 100644
> --- a/tools/perf/util/syscalltbl.c
> +++ b/tools/perf/util/syscalltbl.c
> @@ -26,6 +26,10 @@
>  #include <asm/syscalls_64.c>
>  const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
>  static const char **syscalltbl_native = syscalltbl_x86_64;
> +#elif defined(__s390x__)
> +#include <asm/syscalls_64.c>
> +const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
> +static const char **syscalltbl_native = syscalltbl_s390_64;
>  #endif
>  
>  struct syscall {
> -- 
> 1.8.3.1

Re: [PATCH 1/3] perf s390: generate system call table from asm/unistd.h

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 12:30:40PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Dec 07, 2017 at 09:27:59AM +0100, Hendrik Brueckner escreveu:
> > This should speed up accessing new system calls introduced with
> > the kernel rather than waiting for libaudit updates to include
> > them.
> 
> So, this needs to be split in multiple patches, one grabbing the
> tools/arch/s390/include/uapi/asm/unistd.h copy and adding it to
> check-headers.sh (cool, you did it! :))
> 
> I'll take a stab at splitting it here.

So, splitted it into three patches and tested the generation, showing
the steps and results on the second patch commit message:

[acme@jouet perf]$ git log -3 --oneline
b91e81b8e967 (HEAD -> perf/core, acme.korg/perf/core) perf trace: Use generated syscall table on s390 too
8fe39fe5058d perf s390: Generate system call table from asm/unistd.h
fdd7d74b2782 tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h
[acme@jouet perf]$

And pushed it to my perf/core branch on:

git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git

Please take a look and check that I didn't mess anything up :-)

- Arnaldo

Re: [PATCH 2/3 v2] perf trace: Introduce errno_to_name()

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 04:00:10PM +0100, Hendrik Brueckner escreveu:
> Introduce an errno_to_name() function to return the name of a
> give errno number as string.

Humm, we cannot use asm-generic for all, as there are differences in the
errno numbers from arch to arch, for instance:

In arch/alpha/include/uapi/asm/errno.h we use errno-base.h but even in
that part one of its entries gets a different number on the Alpha arch,
EAGAIN:

-------------------
#include <asm-generic/errno-base.h>

#undef  EAGAIN                  /* 11 in errno-base.h */

#define EDEADLK         11      /* Resource deadlock would occur */

#define EAGAIN          35      /* Try again */
#define EWOULDBLOCK     EAGAIN  /* Operation would block */
-------------------

And then all these are different:

-------------------
#define EINPROGRESS     36      /* Operation now in progress */
#define EALREADY        37      /* Operation already in progress */
#define ENOTSOCK        38      /* Socket operation on non-socket */
#define EDESTADDRREQ    39      /* Destination address required */
#define EMSGSIZE        40      /* Message too long */
#define EPROTOTYPE      41      /* Protocol wrong type for socket */
#define ENOPROTOOPT     42      /* Protocol not available */
<SNIP>
-------------------

mips also has differences, shares errno-base.h completely but:

arch/mips/include/uapi/asm/errno.h
-------------------
/*
 * These error numbers are intended to be MIPS ABI compatible
 */

#include <asm-generic/errno-base.h>

#define ENOMSG		35	/* No message of desired type */
#define EIDRM		36	/* Identifier removed */
#define ECHRNG		37	/* Channel number out of range */
#define EL2NSYNC	38	/* Level 2 not synchronized */
#define EL3HLT		39	/* Level 3 halted */
#define EL3RST		40	/* Level 3 reset */
#define ELNRNG		41	/* Link number out of range */
<SNIP>
-------------------

PARISC looks like MIPS, at least in this little excerpt:

arch/parisc/include/uapi/asm/errno.h
-------------------

#include <asm-generic/errno-base.h>

#define	ENOMSG		35	/* No message of desired type */
#define	EIDRM		36	/* Identifier removed */
#define	ECHRNG		37	/* Channel number out of range */
#define	EL2NSYNC	38	/* Level 2 not synchronized */
#define	EL3HLT		39	/* Level 3 halted */
#define	EL3RST		40	/* Level 3 reset */
#define	ELNRNG		41	/* Link number out of range */
<SNIP>
-------------------

PowerPC is more modest, wants only to change one entry:

#include <asm-generic/errno.h>

#undef  EDEADLOCK
#define EDEADLOCK       58      /* File locking deadlock error */

:-)

So you can try to copy all arch/*/include/uapi/asm/errno.h files and
use the arch to key that, i.e. its almost what you did, but needs to
take the arch into consideration.

Later we'll generate a two dimensional table of sorts, having the first
dimension be the arch name, so that we can translate errnos in a
perf.data file collected on, say, mips (one of these routers) in a tool
running on x86_64 (or S/390 :)).

- Arnaldo

 
> With this change, the dependency to libaudit can be removed for
> architectures that support syscall tables.  Hence, remove the
> audit_errno_to_name() call in builtin-trace.c and just link
> util/syscalltbl.c against libaudit.  A follow-up commit could
> then clean-up this dependency with respect to the syscall table.
> 
> The errno name strings are generated by util/generate-errno-names.sh
> script and saved as util/errno-names.h.
> 
> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> ---
>  tools/perf/.gitignore                   |  1 +
>  tools/perf/Makefile.config              |  2 +-
>  tools/perf/Makefile.perf                | 12 ++++++++++--
>  tools/perf/builtin-trace.c              | 17 ++++++++++++++---
>  tools/perf/util/generate-errno-names.sh | 32 ++++++++++++++++++++++++++++++++
>  5 files changed, 58 insertions(+), 6 deletions(-)
>  create mode 100755 tools/perf/util/generate-errno-names.sh
> 
> diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
> index 643cc4ba..4e022f9 100644
> --- a/tools/perf/.gitignore
> +++ b/tools/perf/.gitignore
> @@ -14,6 +14,7 @@ perf*.1
>  perf*.xml
>  perf*.html
>  common-cmds.h
> +errno-names.h
>  perf.data
>  perf.data.old
>  output.svg
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index ab16aab..d8447b1 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -251,7 +251,7 @@ INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi
>  INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/
>  INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/
>  
> -# $(obj-perf)      for generated common-cmds.h
> +# $(obj-perf)      for generated common-cmds.h and errno-names.h
>  # $(obj-perf)/util for generated bison/flex headers
>  ifneq ($(OUTPUT),)
>  INC_FLAGS += -I$(obj-perf)/util
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index 68cf136..82aed33d 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -518,6 +518,12 @@ $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt
>  $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)
>  	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@
>  
> +$(OUTPUT)util/errno-names.h: util/generate-errno-names.sh
> +	$(QUIET_GEN). util/generate-errno-names.sh \
> +	$(srctree)/include/uapi/asm-generic/errno-base.h \
> +	$(srctree)/include/uapi/asm-generic/errno.h \
> +	> $@+ && mv $@+ $@
> +
>  $(SCRIPTS) : % : %.sh
>  	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'
>  
> @@ -565,7 +571,8 @@ prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioc
>  	$(vhost_virtio_ioctl_array) \
>  	$(madvise_behavior_array) \
>  	$(perf_ioctl_array) \
> -	$(prctl_option_array)
> +	$(prctl_option_array) \
> +	$(OUTPUT)util/errno-names.h
>  
>  $(OUTPUT)%.o: %.c prepare FORCE
>  	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
> @@ -847,7 +854,8 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
>  		$(OUTPUT)$(kcmp_type_array) \
>  		$(OUTPUT)$(vhost_virtio_ioctl_array) \
>  		$(OUTPUT)$(perf_ioctl_array) \
> -		$(OUTPUT)$(prctl_option_array)
> +		$(OUTPUT)$(prctl_option_array) \
> +		$(OUTPUT)util/errno-names.h
>  	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
>  
>  #
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 84debdb..04af6a1 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -42,17 +42,16 @@
>  #include "string2.h"
>  #include "syscalltbl.h"
>  #include "rb_resort.h"
> +#include "util/errno-names.h"
>  
>  #include <errno.h>
>  #include <inttypes.h>
> -#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
>  #include <poll.h>
>  #include <signal.h>
>  #include <stdlib.h>
>  #include <string.h>
>  #include <linux/err.h>
>  #include <linux/filter.h>
> -#include <linux/audit.h>
>  #include <linux/kernel.h>
>  #include <linux/random.h>
>  #include <linux/stringify.h>
> @@ -1659,6 +1658,18 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
>  	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
>  }
>  
> +static const char *errno_to_name(int err)
> +{
> +	switch (err) {
> +#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
> +	ALL_ERRNO_NAME_MAPPINGS
> +#undef ERRNO_NAME_MAP
> +	default:
> +		return "(unknown)";
> +		break;
> +	};
> +}
> +
>  static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
>  			   union perf_event *event __maybe_unused,
>  			   struct perf_sample *sample)
> @@ -1729,7 +1740,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
>  errno_print: {
>  		char bf[STRERR_BUFSIZE];
>  		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
> -			   *e = audit_errno_to_name(-ret);
> +			   *e = errno_to_name(-ret);
>  
>  		fprintf(trace->output, ") = -1 %s %s", e, emsg);
>  	}
> diff --git a/tools/perf/util/generate-errno-names.sh b/tools/perf/util/generate-errno-names.sh
> new file mode 100755
> index 0000000..6c114a8
> --- /dev/null
> +++ b/tools/perf/util/generate-errno-names.sh
> @@ -0,0 +1,32 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Generate errno names header file
> +#
> +# Copyright IBM Corp. 2017
> +# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> +
> +infiles="$@"
> +tmpfile=$(mktemp -t generate-errno-names.XXXXXXXXX)
> +
> +trap 'rm -f $tmpfile' 0
> +
> +grep -hE '^#define[[:blank:]]+([^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' $infiles \
> +	|awk '{ print $2", "$3; }' \
> +	|sort -t, -k2 -nu \
> +	|sed -e 's/^/\tERRNO_NAME_MAP(/' -e 's/$/)/' \
> +	>  $tmpfile
> +
> +cat <<EoHeader
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _UTIL_ERRNO_NAMES_H
> +#define _UTIL_ERRNO_NAMES_H
> +
> +#define ALL_ERRNO_NAME_MAPPINGS \\
> +EoHeader
> +head -n -1 $tmpfile |sed -e 's/$/ \\/'
> +tail -1 $tmpfile
> +
> +cat <<EoFooter
> +#endif	/* _UTIL_ERRNO_NAMES_H */
> +EoFooter
> -- 
> 1.8.3.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 3/3] perf trace: no longer require auditlibs if syscall tables are present

[Arnaldo Carvalho de Melo]

Em Thu, Dec 07, 2017 at 09:28:01AM +0100, Hendrik Brueckner escreveu:
> Change the Makefile and build process to no longer require auditlibs
> interfaces when the architecture provides system call tables.

And this one will have to wait for the fix in how the errno translation
tables are generated, ok?

- Arnaldo
 
> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> ---
>  tools/perf/Makefile.config          | 10 ++++++++--
>  tools/perf/builtin-help.c           |  2 +-
>  tools/perf/perf.c                   |  4 ++--
>  tools/perf/util/generate-cmdlist.sh |  2 +-
>  4 files changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index d8447b1..6a948bf 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -531,8 +531,14 @@ endif
>  
>  ifndef NO_LIBAUDIT
>    ifneq ($(feature-libaudit), 1)
> -    msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
> -    NO_LIBAUDIT := 1
> +    ifeq ($(NO_SYSCALL_TABLE), 1)
> +      msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
> +      NO_LIBAUDIT := 1
> +    else
> +      # With syscall table support, auditlibs are no longer required to build
> +      # the trace tool.
> +      $(call detected,CONFIG_AUDIT)
> +    endif
>    else
>      CFLAGS += -DHAVE_LIBAUDIT_SUPPORT
>      EXTLIBS += -laudit
> diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
> index a0f7ed2..4aca13f 100644
> --- a/tools/perf/builtin-help.c
> +++ b/tools/perf/builtin-help.c
> @@ -439,7 +439,7 @@ int cmd_help(int argc, const char **argv)
>  #ifdef HAVE_LIBELF_SUPPORT
>  		"probe",
>  #endif
> -#ifdef HAVE_LIBAUDIT_SUPPORT
> +#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
>  		"trace",
>  #endif
>  	NULL };
> diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> index 62b1351..1b3fc8e 100644
> --- a/tools/perf/perf.c
> +++ b/tools/perf/perf.c
> @@ -73,7 +73,7 @@ struct cmd_struct {
>  	{ "lock",	cmd_lock,	0 },
>  	{ "kvm",	cmd_kvm,	0 },
>  	{ "test",	cmd_test,	0 },
> -#ifdef HAVE_LIBAUDIT_SUPPORT
> +#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
>  	{ "trace",	cmd_trace,	0 },
>  #endif
>  	{ "inject",	cmd_inject,	0 },
> @@ -485,7 +485,7 @@ int main(int argc, const char **argv)
>  		argv[0] = cmd;
>  	}
>  	if (strstarts(cmd, "trace")) {
> -#ifdef HAVE_LIBAUDIT_SUPPORT
> +#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)
>  		setup_path();
>  		argv[0] = "trace";
>  		return cmd_trace(argc, argv);
> diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
> index 9bbcec4..ff17920 100755
> --- a/tools/perf/util/generate-cmdlist.sh
> +++ b/tools/perf/util/generate-cmdlist.sh
> @@ -38,7 +38,7 @@ do
>  done
>  echo "#endif /* HAVE_LIBELF_SUPPORT */"
>  
> -echo "#ifdef HAVE_LIBAUDIT_SUPPORT"
> +echo "#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE)"
>  sed -n -e 's/^perf-\([^ 	]*\)[ 	].* audit*/\1/p' command-list.txt |
>  sort |
>  while read cmd
> -- 
> 1.8.3.1

Re: [PATCH 1/3] perf s390: generate system call table from asm/unistd.h

[Hendrik Brueckner]

Hi Arnaldo,

On Thu, Dec 07, 2017 at 02:37:31PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Dec 07, 2017 at 12:30:40PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Thu, Dec 07, 2017 at 09:27:59AM +0100, Hendrik Brueckner escreveu:
> > > This should speed up accessing new system calls introduced with
> > > the kernel rather than waiting for libaudit updates to include
> > > them.
> > 
> > So, this needs to be split in multiple patches, one grabbing the
> > tools/arch/s390/include/uapi/asm/unistd.h copy and adding it to
> > check-headers.sh (cool, you did it! :))
> > 
> > I'll take a stab at splitting it here.
> 
> So, splitted it into three patches and tested the generation, showing
> the steps and results on the second patch commit message:
> 
> [acme@jouet perf]$ git log -3 --oneline
> b91e81b8e967 (HEAD -> perf/core, acme.korg/perf/core) perf trace: Use generated syscall table on s390 too
> 8fe39fe5058d perf s390: Generate system call table from asm/unistd.h
> fdd7d74b2782 tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h
> [acme@jouet perf]$
> 
> And pushed it to my perf/core branch on:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
> 
> Please take a look and check that I didn't mess anything up :-)


They look fine.  I have tested them again.  Many thanks for splitting them.
I will try to follow your split guidelines for future commits.

Thanks,
  Hendrik

Re: [PATCH 3/3] perf trace: no longer require auditlibs if syscall tables are present

[Hendrik Brueckner]

On Thu, Dec 07, 2017 at 02:53:52PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Dec 07, 2017 at 09:28:01AM +0100, Hendrik Brueckner escreveu:
> > Change the Makefile and build process to no longer require auditlibs
> > interfaces when the architecture provides system call tables.
> 
> And this one will have to wait for the fix in how the errno translation
> tables are generated, ok?

Yes, it has to wait.

Regards,
  Hendrik

Re: [PATCH 2/3 v2] perf trace: Introduce errno_to_name()

[Hendrik Brueckner]

Hi Arnaldo,

On Thu, Dec 07, 2017 at 02:52:56PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Dec 07, 2017 at 04:00:10PM +0100, Hendrik Brueckner escreveu:
> > Introduce an errno_to_name() function to return the name of a
> > give errno number as string.
> 
> Humm, we cannot use asm-generic for all, as there are differences in the
> errno numbers from arch to arch, for instance:
> 
> In arch/alpha/include/uapi/asm/errno.h we use errno-base.h but even in
> that part one of its entries gets a different number on the Alpha arch,
> EAGAIN:
> -------------------
> #include <asm-generic/errno-base.h>
> 
> #undef  EAGAIN                  /* 11 in errno-base.h */
> 
> #define EDEADLK         11      /* Resource deadlock would occur */
> 
> #define EAGAIN          35      /* Try again */
> #define EWOULDBLOCK     EAGAIN  /* Operation would block */
> -------------------

With that in the mind, I have changed the generation in a way similar
I did for s390 syscall table generation.  The util/generate-errno-names.sh
script can simply process the arch specific errno.h with cpp/gcc.

This approach will work fine if the arch errno.h does only include the
asm-generic/errno*.h files and does not have any differences between 32/64
bit.  Otherwise it becomes more difficult.

> So you can try to copy all arch/*/include/uapi/asm/errno.h files and
> use the arch to key that, i.e. its almost what you did, but needs to
> take the arch into consideration.

util/generate-errno-names.sh is also extended to process architectures
for which there is a resp. directory below the tools/arch/ directory.
Generation of the errno name mappings is still the same but one ALL_
define for each architecture.


> 
> Later we'll generate a two dimensional table of sorts, having the first
> dimension be the arch name, so that we can translate errnos in a
> perf.data file collected on, say, mips (one of these routers) in a tool
> running on x86_64 (or S/390 :)).

Yep... for this I need your help: How to obtain the arch string/ID whatever
in builtin-trace to use the correct errno map?

Below you can find an update on the patch (excluding the patch(es) to grab
the header files, one can do that simply with
	cp --parents -v $(find arch/ -name errno.h) tools/
in the linux source tree.)

---->8---------

Introduce an errno_to_name() function to return the name of a
give errno number as string.

With this change, the dependency to libaudit can be removed for
architectures that support syscall tables.  Hence, remove the
audit_errno_to_name() call in builtin-trace.c and just link
util/syscalltbl.c against libaudit.  A follow-up commit could
then clean-up this dependency with respect to the syscall table.

The errno name strings are generated by util/generate-errno-names.sh
script and saved as util/errno-names.h.  Errno mappings are created
for the architectures that are available in the tool/arch/ directory
in the Linux source tree.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
---
 tools/perf/.gitignore                   |  1 +
 tools/perf/Makefile.config              |  2 +-
 tools/perf/Makefile.perf                |  9 ++++-
 tools/perf/builtin-trace.c              | 26 +++++++++++--
 tools/perf/util/generate-errno-names.sh | 67 +++++++++++++++++++++++++++++++++
 5 files changed, 99 insertions(+), 6 deletions(-)
 create mode 100755 tools/perf/util/generate-errno-names.sh

diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index 643cc4ba..4e022f9 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -14,6 +14,7 @@ perf*.1
 perf*.xml
 perf*.html
 common-cmds.h
+errno-names.h
 perf.data
 perf.data.old
 output.svg
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ab16aab..d8447b1 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -251,7 +251,7 @@ INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/
 INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/
 
-# $(obj-perf)      for generated common-cmds.h
+# $(obj-perf)      for generated common-cmds.h and errno-names.h
 # $(obj-perf)/util for generated bison/flex headers
 ifneq ($(OUTPUT),)
 INC_FLAGS += -I$(obj-perf)/util
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 68cf136..73a2616 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -518,6 +518,9 @@ $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt
 $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)
 	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@
 
+$(OUTPUT)util/errno-names.h: util/generate-errno-names.sh
+	$(QUIET_GEN). util/generate-errno-names.sh "$(CC)" "$(srctree)/tools" > $@+ && mv $@+ $@
+
 $(SCRIPTS) : % : %.sh
 	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'
 
@@ -565,7 +568,8 @@ prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioc
 	$(vhost_virtio_ioctl_array) \
 	$(madvise_behavior_array) \
 	$(perf_ioctl_array) \
-	$(prctl_option_array)
+	$(prctl_option_array) \
+	$(OUTPUT)util/errno-names.h
 
 $(OUTPUT)%.o: %.c prepare FORCE
 	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
@@ -847,7 +851,8 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
 		$(OUTPUT)$(kcmp_type_array) \
 		$(OUTPUT)$(vhost_virtio_ioctl_array) \
 		$(OUTPUT)$(perf_ioctl_array) \
-		$(OUTPUT)$(prctl_option_array)
+		$(OUTPUT)$(prctl_option_array) \
+		$(OUTPUT)util/errno-names.h
 	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
 
 #
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 84debdb..4c7805d 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -42,17 +42,16 @@
 #include "string2.h"
 #include "syscalltbl.h"
 #include "rb_resort.h"
+#include "util/errno-names.h"
 
 #include <errno.h>
 #include <inttypes.h>
-#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
 #include <poll.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
 #include <linux/err.h>
 #include <linux/filter.h>
-#include <linux/audit.h>
 #include <linux/kernel.h>
 #include <linux/random.h>
 #include <linux/stringify.h>
@@ -1659,6 +1658,27 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
 	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
 }
 
+static const char *__generic_errno_to_name(int err)
+{
+#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
+#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
+	switch (err) {
+	ALL_ERRNO_NAME_MAPPINGS__GENERIC
+#undef ERRNO_NAME_MAP
+	default:
+		return "(unknown)";
+		break;
+	}
+}
+
+static const char *errno_to_name(const int arch, int err)
+{
+	switch (arch) {
+	default:
+		return __generic_errno_to_name(err);
+	}
+}
+
 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 			   union perf_event *event __maybe_unused,
 			   struct perf_sample *sample)
@@ -1729,7 +1749,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
 errno_print: {
 		char bf[STRERR_BUFSIZE];
 		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
-			   *e = audit_errno_to_name(-ret);
+			   *e = errno_to_name(0, -ret);
 
 		fprintf(trace->output, ") = -1 %s %s", e, emsg);
 	}
diff --git a/tools/perf/util/generate-errno-names.sh b/tools/perf/util/generate-errno-names.sh
new file mode 100755
index 0000000..57f74d4
--- /dev/null
+++ b/tools/perf/util/generate-errno-names.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate errno names header file
+#
+# Copyright IBM Corp. 2017
+# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+
+gcc="$1"
+toolsdir="$2"
+include_path="-I$toolsdir/include/uapi"
+
+arch_string()
+{
+	echo "$1" |sed -e 'y/- /__/' |tr '[[:lower:]]' '[[:upper:]]'
+}
+
+asm_errno_file()
+{
+	local arch="$1"
+	local header
+
+	header="$toolsdir/arch/$arch/include/uapi/asm/errno.h"
+	if test -r "$header"; then
+		echo "$header"
+	else
+		echo "$toolsdir/include/uapi/asm-generic/errno.h"
+	fi
+}
+
+process_arch()
+{
+	local arch="$1"
+	local tmpfile=$(mktemp -t generate-errno-names.XXXXXXXXX)
+	local asm_errno=$(asm_errno_file "$arch")
+
+	$gcc $include_path -E -dM -x c $asm_errno \
+		|grep -hE '^#define[[:blank:]]+(E[^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' \
+		|awk '{ print $2", "$3; }' \
+		|sort -t, -k2 -nu \
+		|sed -e 's/^/\tERRNO_NAME_MAP(/' -e 's/$/)/' \
+		>  $tmpfile
+
+	printf '#define ALL_ERRNO_NAME_MAPPINGS__%s \\\n' $(arch_string "$arch")
+	head -n -1 $tmpfile |sed -e 's/$/ \\/'
+	tail -1 $tmpfile
+	printf "\n"
+	rm $tmpfile
+}
+
+cat <<EoHeader
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _UTIL_ERRNO_NAMES_H
+#define _UTIL_ERRNO_NAMES_H
+
+EoHeader
+
+for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" |sort); do
+	process_arch "$arch"
+done
+
+# Generic fallback
+process_arch "generic"
+
+cat <<EoFooter
+#endif	/* _UTIL_ERRNO_NAMES_H */
+EoFooter
-- 
1.8.3.1

Re: [PATCH 1/3] perf s390: generate system call table from asm/unistd.h

[Arnaldo Carvalho de Melo]

Em Mon, Dec 11, 2017 at 10:06:39AM +0100, Hendrik Brueckner escreveu:
> Hi Arnaldo,
> 
> On Thu, Dec 07, 2017 at 02:37:31PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Thu, Dec 07, 2017 at 12:30:40PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Thu, Dec 07, 2017 at 09:27:59AM +0100, Hendrik Brueckner escreveu:
> > > > This should speed up accessing new system calls introduced with
> > > > the kernel rather than waiting for libaudit updates to include
> > > > them.
> > > 
> > > So, this needs to be split in multiple patches, one grabbing the
> > > tools/arch/s390/include/uapi/asm/unistd.h copy and adding it to
> > > check-headers.sh (cool, you did it! :))
> > > 
> > > I'll take a stab at splitting it here.
> > 
> > So, splitted it into three patches and tested the generation, showing
> > the steps and results on the second patch commit message:
> > 
> > [acme@jouet perf]$ git log -3 --oneline
> > b91e81b8e967 (HEAD -> perf/core, acme.korg/perf/core) perf trace: Use generated syscall table on s390 too
> > 8fe39fe5058d perf s390: Generate system call table from asm/unistd.h
> > fdd7d74b2782 tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h
> > [acme@jouet perf]$
> > 
> > And pushed it to my perf/core branch on:
> > 
> > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
> > 
> > Please take a look and check that I didn't mess anything up :-)
> 
> 
> They look fine.  I have tested them again.  Many thanks for splitting them.
> I will try to follow your split guidelines for future commits.

Thanks!

- Arnaldo

Re: [PATCH 2/3 v2] perf trace: Introduce errno_to_name()

[Arnaldo Carvalho de Melo]

Em Mon, Dec 11, 2017 at 12:32:59PM +0100, Hendrik Brueckner escreveu:
> Hi Arnaldo,
> 
> On Thu, Dec 07, 2017 at 02:52:56PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Thu, Dec 07, 2017 at 04:00:10PM +0100, Hendrik Brueckner escreveu:
> > > Introduce an errno_to_name() function to return the name of a
> > > give errno number as string.
> > 
> > Humm, we cannot use asm-generic for all, as there are differences in the
> > errno numbers from arch to arch, for instance:
> > 
> > In arch/alpha/include/uapi/asm/errno.h we use errno-base.h but even in
> > that part one of its entries gets a different number on the Alpha arch,
> > EAGAIN:
> > -------------------
> > #include <asm-generic/errno-base.h>
> > 
> > #undef  EAGAIN                  /* 11 in errno-base.h */
> > 
> > #define EDEADLK         11      /* Resource deadlock would occur */
> > 
> > #define EAGAIN          35      /* Try again */
> > #define EWOULDBLOCK     EAGAIN  /* Operation would block */
> > -------------------
 
> With that in the mind, I have changed the generation in a way similar
> I did for s390 syscall table generation.  The util/generate-errno-names.sh
> script can simply process the arch specific errno.h with cpp/gcc.
 
> This approach will work fine if the arch errno.h does only include the
> asm-generic/errno*.h files and does not have any differences between 32/64
> bit.  Otherwise it becomes more difficult.
 
> > So you can try to copy all arch/*/include/uapi/asm/errno.h files and
> > use the arch to key that, i.e. its almost what you did, but needs to
> > take the arch into consideration.
 
> util/generate-errno-names.sh is also extended to process architectures
> for which there is a resp. directory below the tools/arch/ directory.
> Generation of the errno name mappings is still the same but one ALL_
> define for each architecture.
 
> > Later we'll generate a two dimensional table of sorts, having the first
> > dimension be the arch name, so that we can translate errnos in a
> > perf.data file collected on, say, mips (one of these routers) in a tool
> > running on x86_64 (or S/390 :)).
> 
> Yep... for this I need your help: How to obtain the arch string/ID whatever
> in builtin-trace to use the correct errno map?

you can get it from the running system, for live sessions, from uname(),
and for a perf.data file from its header, see the annotation code, but
the function is this:

   perf_evsel__env_arch(evsel)

Will return a perf_env pointer, and that has a lot of details about the
environment where that perf.data file was recorded:

struct perf_env {
        char                    *hostname;
        char                    *os_release;
        char                    *version;
        char                    *arch;
        int                     nr_cpus_online;
        int                     nr_cpus_avail;
        char                    *cpu_desc;
        char                    *cpuid;
        unsigned long long      total_mem;
        unsigned int            msr_pmu_type;

        int                     nr_cmdline;
        int                     nr_sibling_cores;
        int                     nr_sibling_threads;
        int                     nr_numa_nodes;
        int                     nr_pmu_mappings;
        int                     nr_groups;
        char                    *cmdline;
        const char              **cmdline_argv;
        char                    *sibling_cores;
        char                    *sibling_threads;
        char                    *pmu_mappings;
        struct cpu_topology_map *cpu;
        struct cpu_cache_level  *caches;
        int                      caches_cnt;
        struct numa_node        *numa_nodes;
};

The annotate code does some more massaging:

tools/perf/util/annotate.c

        arch_name = annotate__norm_arch(arch_name);

static const char *annotate__norm_arch(const char *arch_name)
{
        struct utsname uts;

        if (!arch_name) { /* Assume we are annotating locally. */
                if (uname(&uts) < 0)
                        return NULL;
                arch_name = uts.machine;
        }
        return normalize_arch((char *)arch_name);
}

We need to first move this from annotate to a more generally available
function, say renaming annotate__norm_arch() to perf_env__norm_arch()
and using it.

I'll do this now and push to my perf/core branch, so that you can
continue from there.
 
> Below you can find an update on the patch (excluding the patch(es) to grab
> the header files, one can do that simply with
> 	cp --parents -v $(find arch/ -name errno.h) tools/
> in the linux source tree.)

Ok, I'll play with it and report back,

- Arnaldo
 
> ---->8---------
> 
> Introduce an errno_to_name() function to return the name of a
> give errno number as string.
> 
> With this change, the dependency to libaudit can be removed for
> architectures that support syscall tables.  Hence, remove the
> audit_errno_to_name() call in builtin-trace.c and just link
> util/syscalltbl.c against libaudit.  A follow-up commit could
> then clean-up this dependency with respect to the syscall table.
> 
> The errno name strings are generated by util/generate-errno-names.sh
> script and saved as util/errno-names.h.  Errno mappings are created
> for the architectures that are available in the tool/arch/ directory
> in the Linux source tree.
> 
> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> ---
>  tools/perf/.gitignore                   |  1 +
>  tools/perf/Makefile.config              |  2 +-
>  tools/perf/Makefile.perf                |  9 ++++-
>  tools/perf/builtin-trace.c              | 26 +++++++++++--
>  tools/perf/util/generate-errno-names.sh | 67 +++++++++++++++++++++++++++++++++
>  5 files changed, 99 insertions(+), 6 deletions(-)
>  create mode 100755 tools/perf/util/generate-errno-names.sh
> 
> diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
> index 643cc4ba..4e022f9 100644
> --- a/tools/perf/.gitignore
> +++ b/tools/perf/.gitignore
> @@ -14,6 +14,7 @@ perf*.1
>  perf*.xml
>  perf*.html
>  common-cmds.h
> +errno-names.h
>  perf.data
>  perf.data.old
>  output.svg
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index ab16aab..d8447b1 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -251,7 +251,7 @@ INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi
>  INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/include/
>  INC_FLAGS += -I$(srctree)/tools/arch/$(SRCARCH)/
>  
> -# $(obj-perf)      for generated common-cmds.h
> +# $(obj-perf)      for generated common-cmds.h and errno-names.h
>  # $(obj-perf)/util for generated bison/flex headers
>  ifneq ($(OUTPUT),)
>  INC_FLAGS += -I$(obj-perf)/util
> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> index 68cf136..73a2616 100644
> --- a/tools/perf/Makefile.perf
> +++ b/tools/perf/Makefile.perf
> @@ -518,6 +518,9 @@ $(OUTPUT)common-cmds.h: util/generate-cmdlist.sh command-list.txt
>  $(OUTPUT)common-cmds.h: $(wildcard Documentation/perf-*.txt)
>  	$(QUIET_GEN). util/generate-cmdlist.sh > $@+ && mv $@+ $@
>  
> +$(OUTPUT)util/errno-names.h: util/generate-errno-names.sh
> +	$(QUIET_GEN). util/generate-errno-names.sh "$(CC)" "$(srctree)/tools" > $@+ && mv $@+ $@
> +
>  $(SCRIPTS) : % : %.sh
>  	$(QUIET_GEN)$(INSTALL) '$@.sh' '$(OUTPUT)$@'
>  
> @@ -565,7 +568,8 @@ prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioc
>  	$(vhost_virtio_ioctl_array) \
>  	$(madvise_behavior_array) \
>  	$(perf_ioctl_array) \
> -	$(prctl_option_array)
> +	$(prctl_option_array) \
> +	$(OUTPUT)util/errno-names.h
>  
>  $(OUTPUT)%.o: %.c prepare FORCE
>  	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
> @@ -847,7 +851,8 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
>  		$(OUTPUT)$(kcmp_type_array) \
>  		$(OUTPUT)$(vhost_virtio_ioctl_array) \
>  		$(OUTPUT)$(perf_ioctl_array) \
> -		$(OUTPUT)$(prctl_option_array)
> +		$(OUTPUT)$(prctl_option_array) \
> +		$(OUTPUT)util/errno-names.h
>  	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
>  
>  #
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 84debdb..4c7805d 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -42,17 +42,16 @@
>  #include "string2.h"
>  #include "syscalltbl.h"
>  #include "rb_resort.h"
> +#include "util/errno-names.h"
>  
>  #include <errno.h>
>  #include <inttypes.h>
> -#include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
>  #include <poll.h>
>  #include <signal.h>
>  #include <stdlib.h>
>  #include <string.h>
>  #include <linux/err.h>
>  #include <linux/filter.h>
> -#include <linux/audit.h>
>  #include <linux/kernel.h>
>  #include <linux/random.h>
>  #include <linux/stringify.h>
> @@ -1659,6 +1658,27 @@ static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sam
>  	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
>  }
>  
> +static const char *__generic_errno_to_name(int err)
> +{
> +#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
> +#define ERRNO_NAME_MAP(_err, _num) case _num: return #_err;
> +	switch (err) {
> +	ALL_ERRNO_NAME_MAPPINGS__GENERIC
> +#undef ERRNO_NAME_MAP
> +	default:
> +		return "(unknown)";
> +		break;
> +	}
> +}
> +
> +static const char *errno_to_name(const int arch, int err)
> +{
> +	switch (arch) {
> +	default:
> +		return __generic_errno_to_name(err);
> +	}
> +}
> +
>  static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
>  			   union perf_event *event __maybe_unused,
>  			   struct perf_sample *sample)
> @@ -1729,7 +1749,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
>  errno_print: {
>  		char bf[STRERR_BUFSIZE];
>  		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
> -			   *e = audit_errno_to_name(-ret);
> +			   *e = errno_to_name(0, -ret);
>  
>  		fprintf(trace->output, ") = -1 %s %s", e, emsg);
>  	}
> diff --git a/tools/perf/util/generate-errno-names.sh b/tools/perf/util/generate-errno-names.sh
> new file mode 100755
> index 0000000..57f74d4
> --- /dev/null
> +++ b/tools/perf/util/generate-errno-names.sh
> @@ -0,0 +1,67 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Generate errno names header file
> +#
> +# Copyright IBM Corp. 2017
> +# Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
> +
> +gcc="$1"
> +toolsdir="$2"
> +include_path="-I$toolsdir/include/uapi"
> +
> +arch_string()
> +{
> +	echo "$1" |sed -e 'y/- /__/' |tr '[[:lower:]]' '[[:upper:]]'
> +}
> +
> +asm_errno_file()
> +{
> +	local arch="$1"
> +	local header
> +
> +	header="$toolsdir/arch/$arch/include/uapi/asm/errno.h"
> +	if test -r "$header"; then
> +		echo "$header"
> +	else
> +		echo "$toolsdir/include/uapi/asm-generic/errno.h"
> +	fi
> +}
> +
> +process_arch()
> +{
> +	local arch="$1"
> +	local tmpfile=$(mktemp -t generate-errno-names.XXXXXXXXX)
> +	local asm_errno=$(asm_errno_file "$arch")
> +
> +	$gcc $include_path -E -dM -x c $asm_errno \
> +		|grep -hE '^#define[[:blank:]]+(E[^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' \
> +		|awk '{ print $2", "$3; }' \
> +		|sort -t, -k2 -nu \
> +		|sed -e 's/^/\tERRNO_NAME_MAP(/' -e 's/$/)/' \
> +		>  $tmpfile
> +
> +	printf '#define ALL_ERRNO_NAME_MAPPINGS__%s \\\n' $(arch_string "$arch")
> +	head -n -1 $tmpfile |sed -e 's/$/ \\/'
> +	tail -1 $tmpfile
> +	printf "\n"
> +	rm $tmpfile
> +}
> +
> +cat <<EoHeader
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _UTIL_ERRNO_NAMES_H
> +#define _UTIL_ERRNO_NAMES_H
> +
> +EoHeader
> +
> +for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" |sort); do
> +	process_arch "$arch"
> +done
> +
> +# Generic fallback
> +process_arch "generic"
> +
> +cat <<EoFooter
> +#endif	/* _UTIL_ERRNO_NAMES_H */
> +EoFooter
> -- 
> 1.8.3.1

container test for cross building s390 tools failing

[Arnaldo Carvalho de Melo]

Hi, noticed this with my perf/core branch, will investigate later.

[root@jouet ubuntu]# cat /tmp/dm.log.JAK3XV/ubuntu\:16.04-x-s390 
ubuntu:16.04-x-s390
Downloading http://192.168.124.1/perf/perf-4.15.0-rc3.tar.xz...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1237k  100 1237k    0     0   236M      0 --:--:-- --:--:-- --:--:--  402M
make: Entering directory '/git/linux/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
  HOSTCC   /tmp/build/perf/fixdep.o
  HOSTLD   /tmp/build/perf/fixdep-in.o
  LINK     /tmp/build/perf/fixdep
sh: 1: command: Illegal option -c

Auto-detecting system features:
...                         dwarf: [ on  ]
...            dwarf_getlocations: [ on  ]
...                         glibc: [ on  ]
...                          gtk2: [ OFF ]
...                      libaudit: [ OFF ]
...                        libbfd: [ OFF ]
...                        libelf: [ on  ]
...                       libnuma: [ OFF ]
...        numa_num_possible_cpus: [ OFF ]
...                       libperl: [ OFF ]
...                     libpython: [ OFF ]
...                      libslang: [ OFF ]
...                     libcrypto: [ OFF ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ on  ]
...                          zlib: [ on  ]
...                          lzma: [ OFF ]
...                     get_cpuid: [ OFF ]
...                           bpf: [ on  ]

Makefile.config:414: No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev
Makefile.config:537: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
Makefile.config:548: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev
Makefile.config:563: slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev
Makefile.config:577: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
Makefile.config:604: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
Makefile.config:630: No python interpreter was found: disables Python support - please install python-devel/python-dev
Makefile.config:699: No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling
Makefile.config:728: No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev
Makefile.config:741: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
Makefile.config:818: No alternatives command found, you need to set JDIR= to point to the root of your Java directory
  GEN      /tmp/build/perf/common-cmds.h
  PERF_VERSION = 4.15.rc3.g5e73c6
  MKDIR    /tmp/build/perf/fd/
  CC       /tmp/build/perf/fd/array.o
  CC       /tmp/build/perf/event-parse.o
  CC       /tmp/build/perf/exec-cmd.o
  CC       /tmp/build/perf/libbpf.o
  LD       /tmp/build/perf/fd/libapi-in.o
  CC       /tmp/build/perf/help.o
  MKDIR    /tmp/build/perf/fs/
  CC       /tmp/build/perf/fs/fs.o
  CC       /tmp/build/perf/bpf.o
  MKDIR    /tmp/build/perf/fs/
  CC       /tmp/build/perf/fs/tracing_path.o
  LD       /tmp/build/perf/libbpf-in.o
  LINK     /tmp/build/perf/libbpf.a
  CC       /tmp/build/perf/pager.o
  LD       /tmp/build/perf/fs/libapi-in.o
  CC       /tmp/build/perf/cpu.o
  CC       /tmp/build/perf/debug.o
  CC       /tmp/build/perf/str_error_r.o
  CC       /tmp/build/perf/event-plugin.o
  LD       /tmp/build/perf/libapi-in.o
  AR       /tmp/build/perf/libapi.a
  MKDIR    /tmp/build/perf/pmu-events/
  HOSTCC   /tmp/build/perf/pmu-events/json.o
  CC       /tmp/build/perf/parse-options.o
  CC       /tmp/build/perf/trace-seq.o
  CC       /tmp/build/perf/parse-filter.o
  CC       /tmp/build/perf/parse-utils.o
  CC       /tmp/build/perf/kbuffer-parse.o
  MKDIR    /tmp/build/perf/pmu-events/
  HOSTCC   /tmp/build/perf/pmu-events/jsmn.o
  HOSTCC   /tmp/build/perf/pmu-events/jevents.o
  LD       /tmp/build/perf/libtraceevent-in.o
  LINK     /tmp/build/perf/libtraceevent.a
  CC       /tmp/build/perf/run-command.o
  CC       /tmp/build/perf/plugin_jbd2.o
  CC       /tmp/build/perf/sigchain.o
  HOSTLD   /tmp/build/perf/pmu-events/jevents-in.o
  GEN      perf-archive
  CC       /tmp/build/perf/subcmd-config.o
  GEN      perf-with-kcore
  LD       /tmp/build/perf/plugin_jbd2-in.o
  MKDIR    /tmp/build/perf/util/
  CC       /tmp/build/perf/util/annotate.o
  CC       /tmp/build/perf/plugin_hrtimer.o
  CC       /tmp/build/perf/plugin_kmem.o
  LD       /tmp/build/perf/plugin_kmem-in.o
  LD       /tmp/build/perf/libsubcmd-in.o
  LD       /tmp/build/perf/plugin_hrtimer-in.o
  CC       /tmp/build/perf/plugin_kvm.o
  AR       /tmp/build/perf/libsubcmd.a
  CC       /tmp/build/perf/builtin-bench.o
In file included from util/perf_regs.h:27:0,
                 from util/event.h:11,
                 from util/symbol.h:16,
                 from util/sort.h:12,
                 from util/annotate.c:14:
/git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
compilation terminated.
  CC       /tmp/build/perf/builtin-annotate.o
mv: cannot stat '/tmp/build/perf/util/.annotate.o.tmp': No such file or directory
/git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/util/annotate.o' failed
make[4]: *** [/tmp/build/perf/util/annotate.o] Error 1
/git/linux/tools/build/Makefile.build:139: recipe for target 'util' failed
make[3]: *** [util] Error 2
Makefile.perf:619: recipe for target '/tmp/build/perf/libperf-in.o' failed
make[2]: *** [/tmp/build/perf/libperf-in.o] Error 2
make[2]: *** Waiting for unfinished jobs....
  CC       /tmp/build/perf/builtin-config.o
In file included from util/perf_regs.h:27:0,
                 from util/event.h:11,
                 from util/symbol.h:16,
                 from builtin-annotate.c:16:
/git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
In file included from util/perf_regs.h:27:0,
                 from util/event.h:11,
                 from util/debug.h:9,
                 from builtin-config.c:15:
/git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
compilation terminated.
compilation terminated.
mv: cannot stat '/tmp/build/perf/.builtin-config.o.tmp': No such file or directory
/git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-config.o' failed
make[3]: *** [/tmp/build/perf/builtin-config.o] Error 1
make[3]: *** Waiting for unfinished jobs....
mv: cannot stat '/tmp/build/perf/.builtin-annotate.o.tmp': No such file or directory
/git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-annotate.o' failed
make[3]: *** [/tmp/build/perf/builtin-annotate.o] Error 1
  CC       /tmp/build/perf/plugin_mac80211.o
  CC       /tmp/build/perf/plugin_sched_switch.o
  LD       /tmp/build/perf/plugin_sched_switch-in.o
  LD       /tmp/build/perf/plugin_mac80211-in.o
  LD       /tmp/build/perf/plugin_kvm-in.o
  CC       /tmp/build/perf/plugin_xen.o
  CC       /tmp/build/perf/plugin_scsi.o
  CC       /tmp/build/perf/plugin_function.o
Makefile.perf:495: recipe for target '/tmp/build/perf/perf-in.o' failed
make[2]: *** [/tmp/build/perf/perf-in.o] Error 2
  CC       /tmp/build/perf/plugin_cfg80211.o
  LD       /tmp/build/perf/plugin_xen-in.o
  LD       /tmp/build/perf/plugin_function-in.o
  LINK     /tmp/build/perf/plugin_jbd2.so
  LINK     /tmp/build/perf/plugin_hrtimer.so
  LD       /tmp/build/perf/plugin_scsi-in.o
  LINK     /tmp/build/perf/plugin_kmem.so
  LINK     /tmp/build/perf/plugin_kvm.so
  LD       /tmp/build/perf/plugin_cfg80211-in.o
  LINK     /tmp/build/perf/plugin_mac80211.so
  LINK     /tmp/build/perf/plugin_sched_switch.so
  LINK     /tmp/build/perf/plugin_function.so
  LINK     /tmp/build/perf/plugin_xen.so
  LINK     /tmp/build/perf/plugin_scsi.so
  LINK     /tmp/build/perf/plugin_cfg80211.so
Makefile.perf:209: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:69: recipe for target 'all' failed
make: *** [all] Error 2
make: Leaving directory '/git/linux/tools/perf'
[root@jouet ubuntu]# 

Re: container test for cross building s390 tools failing

[Thomas-Mich Richter]

On 12/13/2017 05:31 PM, Arnaldo Carvalho de Melo wrote:
> Hi, noticed this with my perf/core branch, will investigate later.
> 
> [root@jouet ubuntu]# cat /tmp/dm.log.JAK3XV/ubuntu\:16.04-x-s390 
> ubuntu:16.04-x-s390
> Downloading http://192.168.124.1/perf/perf-4.15.0-rc3.tar.xz...
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
>                                  Dload  Upload   Total   Spent    Left  Speed
> 100 1237k  100 1237k    0     0   236M      0 --:--:-- --:--:-- --:--:--  402M
> make: Entering directory '/git/linux/tools/perf'
>   BUILD:   Doing 'make -j4' parallel build
>   HOSTCC   /tmp/build/perf/fixdep.o
>   HOSTLD   /tmp/build/perf/fixdep-in.o
>   LINK     /tmp/build/perf/fixdep
> sh: 1: command: Illegal option -c
> 
> Auto-detecting system features:
> ...                         dwarf: [ on  ]
> ...            dwarf_getlocations: [ on  ]
> ...                         glibc: [ on  ]
> ...                          gtk2: [ OFF ]
> ...                      libaudit: [ OFF ]
> ...                        libbfd: [ OFF ]
> ...                        libelf: [ on  ]
> ...                       libnuma: [ OFF ]
> ...        numa_num_possible_cpus: [ OFF ]
> ...                       libperl: [ OFF ]
> ...                     libpython: [ OFF ]
> ...                      libslang: [ OFF ]
> ...                     libcrypto: [ OFF ]
> ...                     libunwind: [ OFF ]
> ...            libdw-dwarf-unwind: [ on  ]
> ...                          zlib: [ on  ]
> ...                          lzma: [ OFF ]
> ...                     get_cpuid: [ OFF ]
> ...                           bpf: [ on  ]
> 
> Makefile.config:414: No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev
> Makefile.config:537: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
> Makefile.config:548: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev
> Makefile.config:563: slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev
> Makefile.config:577: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
> Makefile.config:604: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
> Makefile.config:630: No python interpreter was found: disables Python support - please install python-devel/python-dev
> Makefile.config:699: No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling
> Makefile.config:728: No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev
> Makefile.config:741: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
> Makefile.config:818: No alternatives command found, you need to set JDIR= to point to the root of your Java directory
>   GEN      /tmp/build/perf/common-cmds.h
>   PERF_VERSION = 4.15.rc3.g5e73c6
>   MKDIR    /tmp/build/perf/fd/
>   CC       /tmp/build/perf/fd/array.o
>   CC       /tmp/build/perf/event-parse.o
>   CC       /tmp/build/perf/exec-cmd.o
>   CC       /tmp/build/perf/libbpf.o
>   LD       /tmp/build/perf/fd/libapi-in.o
>   CC       /tmp/build/perf/help.o
>   MKDIR    /tmp/build/perf/fs/
>   CC       /tmp/build/perf/fs/fs.o
>   CC       /tmp/build/perf/bpf.o
>   MKDIR    /tmp/build/perf/fs/
>   CC       /tmp/build/perf/fs/tracing_path.o
>   LD       /tmp/build/perf/libbpf-in.o
>   LINK     /tmp/build/perf/libbpf.a
>   CC       /tmp/build/perf/pager.o
>   LD       /tmp/build/perf/fs/libapi-in.o
>   CC       /tmp/build/perf/cpu.o
>   CC       /tmp/build/perf/debug.o
>   CC       /tmp/build/perf/str_error_r.o
>   CC       /tmp/build/perf/event-plugin.o
>   LD       /tmp/build/perf/libapi-in.o
>   AR       /tmp/build/perf/libapi.a
>   MKDIR    /tmp/build/perf/pmu-events/
>   HOSTCC   /tmp/build/perf/pmu-events/json.o
>   CC       /tmp/build/perf/parse-options.o
>   CC       /tmp/build/perf/trace-seq.o
>   CC       /tmp/build/perf/parse-filter.o
>   CC       /tmp/build/perf/parse-utils.o
>   CC       /tmp/build/perf/kbuffer-parse.o
>   MKDIR    /tmp/build/perf/pmu-events/
>   HOSTCC   /tmp/build/perf/pmu-events/jsmn.o
>   HOSTCC   /tmp/build/perf/pmu-events/jevents.o
>   LD       /tmp/build/perf/libtraceevent-in.o
>   LINK     /tmp/build/perf/libtraceevent.a
>   CC       /tmp/build/perf/run-command.o
>   CC       /tmp/build/perf/plugin_jbd2.o
>   CC       /tmp/build/perf/sigchain.o
>   HOSTLD   /tmp/build/perf/pmu-events/jevents-in.o
>   GEN      perf-archive
>   CC       /tmp/build/perf/subcmd-config.o
>   GEN      perf-with-kcore
>   LD       /tmp/build/perf/plugin_jbd2-in.o
>   MKDIR    /tmp/build/perf/util/
>   CC       /tmp/build/perf/util/annotate.o
>   CC       /tmp/build/perf/plugin_hrtimer.o
>   CC       /tmp/build/perf/plugin_kmem.o
>   LD       /tmp/build/perf/plugin_kmem-in.o
>   LD       /tmp/build/perf/libsubcmd-in.o
>   LD       /tmp/build/perf/plugin_hrtimer-in.o
>   CC       /tmp/build/perf/plugin_kvm.o
>   AR       /tmp/build/perf/libsubcmd.a
>   CC       /tmp/build/perf/builtin-bench.o
> In file included from util/perf_regs.h:27:0,
>                  from util/event.h:11,
>                  from util/symbol.h:16,
>                  from util/sort.h:12,
>                  from util/annotate.c:14:
> /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> compilation terminated.
>   CC       /tmp/build/perf/builtin-annotate.o
> mv: cannot stat '/tmp/build/perf/util/.annotate.o.tmp': No such file or directory
> /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/util/annotate.o' failed
> make[4]: *** [/tmp/build/perf/util/annotate.o] Error 1
> /git/linux/tools/build/Makefile.build:139: recipe for target 'util' failed
> make[3]: *** [util] Error 2
> Makefile.perf:619: recipe for target '/tmp/build/perf/libperf-in.o' failed
> make[2]: *** [/tmp/build/perf/libperf-in.o] Error 2
> make[2]: *** Waiting for unfinished jobs....
>   CC       /tmp/build/perf/builtin-config.o
> In file included from util/perf_regs.h:27:0,
>                  from util/event.h:11,
>                  from util/symbol.h:16,
>                  from builtin-annotate.c:16:
> /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> In file included from util/perf_regs.h:27:0,
>                  from util/event.h:11,
>                  from util/debug.h:9,
>                  from builtin-config.c:15:
> /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> compilation terminated.
> compilation terminated.
> mv: cannot stat '/tmp/build/perf/.builtin-config.o.tmp': No such file or directory
> /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-config.o' failed
> make[3]: *** [/tmp/build/perf/builtin-config.o] Error 1
> make[3]: *** Waiting for unfinished jobs....
> mv: cannot stat '/tmp/build/perf/.builtin-annotate.o.tmp': No such file or directory
> /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-annotate.o' failed
> make[3]: *** [/tmp/build/perf/builtin-annotate.o] Error 1
>   CC       /tmp/build/perf/plugin_mac80211.o
>   CC       /tmp/build/perf/plugin_sched_switch.o
>   LD       /tmp/build/perf/plugin_sched_switch-in.o
>   LD       /tmp/build/perf/plugin_mac80211-in.o
>   LD       /tmp/build/perf/plugin_kvm-in.o
>   CC       /tmp/build/perf/plugin_xen.o
>   CC       /tmp/build/perf/plugin_scsi.o
>   CC       /tmp/build/perf/plugin_function.o
> Makefile.perf:495: recipe for target '/tmp/build/perf/perf-in.o' failed
> make[2]: *** [/tmp/build/perf/perf-in.o] Error 2
>   CC       /tmp/build/perf/plugin_cfg80211.o
>   LD       /tmp/build/perf/plugin_xen-in.o
>   LD       /tmp/build/perf/plugin_function-in.o
>   LINK     /tmp/build/perf/plugin_jbd2.so
>   LINK     /tmp/build/perf/plugin_hrtimer.so
>   LD       /tmp/build/perf/plugin_scsi-in.o
>   LINK     /tmp/build/perf/plugin_kmem.so
>   LINK     /tmp/build/perf/plugin_kvm.so
>   LD       /tmp/build/perf/plugin_cfg80211-in.o
>   LINK     /tmp/build/perf/plugin_mac80211.so
>   LINK     /tmp/build/perf/plugin_sched_switch.so
>   LINK     /tmp/build/perf/plugin_function.so
>   LINK     /tmp/build/perf/plugin_xen.so
>   LINK     /tmp/build/perf/plugin_scsi.so
>   LINK     /tmp/build/perf/plugin_cfg80211.so
> Makefile.perf:209: recipe for target 'sub-make' failed
> make[1]: *** [sub-make] Error 2
> Makefile:69: recipe for target 'all' failed
> make: *** [all] Error 2
> make: Leaving directory '/git/linux/tools/perf'
> [root@jouet ubuntu]# 
> 

Maybe I miss something.

I just downloded the latest linux-4.15.0-rc3 and built the kernel and the perf tool on an s390x LPAR
without any errors:

[root@s35lp76 perf]# git tag|fgrep 4.15
v4.15-rc1
v4.15-rc2
v4.15-rc3
[root@s35lp76 perf]# pwd
/root/linux2/tools/perf
[root@s35lp76 perf]# make
  BUILD:   Doing 'make -j1' parallel build
Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'

Auto-detecting system features:
...                         dwarf: [ on  ]
...            dwarf_getlocations: [ on  ]
...                         glibc: [ on  ]
...                          gtk2: [ OFF ]
...                      libaudit: [ on  ]
...                        libbfd: [ on  ]
...                        libelf: [ on  ]
...                       libnuma: [ on  ]
...        numa_num_possible_cpus: [ on  ]
...                       libperl: [ on  ]
...                     libpython: [ on  ]
...                      libslang: [ on  ]
...                     libcrypto: [ on  ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ on  ]
...                          zlib: [ on  ]
...                          lzma: [ on  ]
...                     get_cpuid: [ OFF ]
...                           bpf: [ on  ]

Makefile.config:566: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
Makefile.config:817: No openjdk development package found, please install JDK package
[root@s35lp76 perf]#

The perf build went smoothly and when I type 'make'
again, the build process does not complain about missing files.

-- 
Thomas Richter, Dept 3303, IBM LTC Boeblingen Germany
--
Vorsitzende des Aufsichtsrats: Martina Koederitz 
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294

Re: container test for cross building s390 tools failing

[Arnaldo Carvalho de Melo]

Em Thu, Dec 14, 2017 at 02:26:56PM +0100, Thomas-Mich Richter escreveu:
> On 12/13/2017 05:31 PM, Arnaldo Carvalho de Melo wrote:
> > Hi, noticed this with my perf/core branch, will investigate later.

> > [root@jouet ubuntu]# cat /tmp/dm.log.JAK3XV/ubuntu\:16.04-x-s390 
> > ubuntu:16.04-x-s390
> > Downloading http://192.168.124.1/perf/perf-4.15.0-rc3.tar.xz...
> >   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
> >                                  Dload  Upload   Total   Spent    Left  Speed
> > 100 1237k  100 1237k    0     0   236M      0 --:--:-- --:--:-- --:--:--  402M
> > make: Entering directory '/git/linux/tools/perf'
> >   BUILD:   Doing 'make -j4' parallel build
> >   HOSTCC   /tmp/build/perf/fixdep.o
<SNIP>
> >   CC       /tmp/build/perf/builtin-bench.o
> > In file included from util/perf_regs.h:27:0,
> >                  from util/event.h:11,
> >                  from util/symbol.h:16,
> >                  from util/sort.h:12,
> >                  from util/annotate.c:14:
> > /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> > compilation terminated.
> >   CC       /tmp/build/perf/builtin-annotate.o
> > mv: cannot stat '/tmp/build/perf/util/.annotate.o.tmp': No such file or directory
> > /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/util/annotate.o' failed
> > make[4]: *** [/tmp/build/perf/util/annotate.o] Error 1
> > /git/linux/tools/build/Makefile.build:139: recipe for target 'util' failed
> > make[3]: *** [util] Error 2
> > Makefile.perf:619: recipe for target '/tmp/build/perf/libperf-in.o' failed
> > make[2]: *** [/tmp/build/perf/libperf-in.o] Error 2
> > make[2]: *** Waiting for unfinished jobs....
> >   CC       /tmp/build/perf/builtin-config.o
> > In file included from util/perf_regs.h:27:0,
> >                  from util/event.h:11,
> >                  from util/symbol.h:16,
> >                  from builtin-annotate.c:16:
> > /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> > In file included from util/perf_regs.h:27:0,
> >                  from util/event.h:11,
> >                  from util/debug.h:9,
> >                  from builtin-config.c:15:
> > /git/linux/tools/perf/arch/s390/include/perf_regs.h:6:62: fatal error: ../../../../arch/s390/include/uapi/asm/perf_regs.h: No such file or directory
> > compilation terminated.
> > compilation terminated.
> > mv: cannot stat '/tmp/build/perf/.builtin-config.o.tmp': No such file or directory
> > /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-config.o' failed
> > make[3]: *** [/tmp/build/perf/builtin-config.o] Error 1
> > make[3]: *** Waiting for unfinished jobs....
> > mv: cannot stat '/tmp/build/perf/.builtin-annotate.o.tmp': No such file or directory
> > /git/linux/tools/build/Makefile.build:96: recipe for target '/tmp/build/perf/builtin-annotate.o' failed
> > make[3]: *** [/tmp/build/perf/builtin-annotate.o] Error 1
> >   CC       /tmp/build/perf/plugin_mac80211.o
<SNIP>
> > Makefile.perf:495: recipe for target '/tmp/build/perf/perf-in.o' failed
> > make[2]: *** [/tmp/build/perf/perf-in.o] Error 2
> >   CC       /tmp/build/perf/plugin_cfg80211.o
<SNIP>
> > Makefile.perf:209: recipe for target 'sub-make' failed
> > make[1]: *** [sub-make] Error 2
> > Makefile:69: recipe for target 'all' failed
> > make: *** [all] Error 2
> > make: Leaving directory '/git/linux/tools/perf'
> > [root@jouet ubuntu]# 
 
> Maybe I miss something.
 
> I just downloded the latest linux-4.15.0-rc3 and built the kernel and the perf tool on an s390x LPAR
> without any errors:
 
> [root@s35lp76 perf]# git tag|fgrep 4.15
> v4.15-rc1
> v4.15-rc2
> v4.15-rc3
> [root@s35lp76 perf]# pwd
> /root/linux2/tools/perf
> [root@s35lp76 perf]# make
>   BUILD:   Doing 'make -j1' parallel build
> Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
> Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
> 
> Auto-detecting system features:
> ...                         dwarf: [ on  ]
> ...            dwarf_getlocations: [ on  ]
> ...                         glibc: [ on  ]
> ...                          gtk2: [ OFF ]
> ...                      libaudit: [ on  ]
> ...                        libbfd: [ on  ]
> ...                        libelf: [ on  ]
> ...                       libnuma: [ on  ]
> ...        numa_num_possible_cpus: [ on  ]
> ...                       libperl: [ on  ]
> ...                     libpython: [ on  ]
> ...                      libslang: [ on  ]
> ...                     libcrypto: [ on  ]
> ...                     libunwind: [ OFF ]
> ...            libdw-dwarf-unwind: [ on  ]
> ...                          zlib: [ on  ]
> ...                          lzma: [ on  ]
> ...                     get_cpuid: [ OFF ]
> ...                           bpf: [ on  ]
 
> Makefile.config:566: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
> Makefile.config:817: No openjdk development package found, please install JDK package
> [root@s35lp76 perf]#
 
> The perf build went smoothly and when I type 'make'
> again, the build process does not complain about missing files.

Right, when you build tools/perf inside a checked out copy of the kernel
sources, you'll be able to access files outside tools/ and everything
will build just fine.

But tools/ living code shouldn't access anything outside tools/, so when
you do:

[acme@jouet perf]$ make help | grep perf
  perf-tar-src-pkg    - Build perf-4.15.0-rc3.tar source tarball
  perf-targz-src-pkg  - Build perf-4.15.0-rc3.tar.gz source tarball
  perf-tarbz2-src-pkg - Build perf-4.15.0-rc3.tar.bz2 source tarball
  perf-tarxz-src-pkg  - Build perf-4.15.0-rc3.tar.xz source tarball
[acme@jouet perf]$

And grab the resulting tarball (just run ls -lart), extract it, say,
under /tmp/, or in some other machine, and try to build it, it'll fail.

I've fixed this already, please check:

https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/commit/?h=perf/core&id=642d3d0964efb216c2823af78147c46913f26804

Doing it this way will also warn us when something changes in the files
used by tools/perf/ that may be of interest to tooling, just like with
the other tools/{arch,include/lib}/ files we copied from the kernel
sources.

- Arnaldo