From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Xu Date: Fri, 8 Nov 2019 20:00:18 +0800 Subject: [LTP] [PATCH v5 1/2] syscalls/prctl08: New test for prctl() with PR_{SET, GET}_TIMERSLACK In-Reply-To: <20191107130543.GD22352@rei.lan> References: <20191107130543.GD22352@rei.lan> Message-ID: <1573214419-15435-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it Signed-off-by: Yang Xu --- include/lapi/prctl.h | 5 + runtest/syscalls | 1 + testcases/kernel/syscalls/prctl/.gitignore | 1 + testcases/kernel/syscalls/prctl/prctl08.c | 139 +++++++++++++++++++++ 4 files changed, 146 insertions(+) create mode 100644 testcases/kernel/syscalls/prctl/prctl08.c diff --git a/include/lapi/prctl.h b/include/lapi/prctl.h index 8ee492259..0b4e196c3 100644 --- a/include/lapi/prctl.h +++ b/include/lapi/prctl.h @@ -19,6 +19,11 @@ # define PR_SET_SECCOMP 22 #endif +#ifndef PR_SET_TIMERSLACK +# define PR_SET_TIMERSLACK 29 +# define PR_GET_TIMERSLACK 30 +#endif + #ifndef PR_SET_CHILD_SUBREAPER # define PR_SET_CHILD_SUBREAPER 36 # define PR_GET_CHILD_SUBREAPER 37 diff --git a/runtest/syscalls b/runtest/syscalls index 12d3e0d3b..fee91f909 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -879,6 +879,7 @@ prctl04 prctl04 prctl05 prctl05 prctl06 prctl06 prctl07 prctl07 +prctl08 prctl08 pread01 pread01 pread01_64 pread01_64 diff --git a/testcases/kernel/syscalls/prctl/.gitignore b/testcases/kernel/syscalls/prctl/.gitignore index 2178db366..fe36a8e0f 100644 --- a/testcases/kernel/syscalls/prctl/.gitignore +++ b/testcases/kernel/syscalls/prctl/.gitignore @@ -6,3 +6,4 @@ /prctl06 /prctl06_execve /prctl07 +/prctl08 diff --git a/testcases/kernel/syscalls/prctl/prctl08.c b/testcases/kernel/syscalls/prctl/prctl08.c new file mode 100644 index 000000000..fd8ccb6ad --- /dev/null +++ b/testcases/kernel/syscalls/prctl/prctl08.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2019 FUJITSU LIMITED. All rights reserved. + * Author: Yang Xu + * + * Test PR_GET_TIMERSLACK and PR_SET_TIMERSLACK of prctl(2). + * 1)Each thread has two associated timer slack values: a "default" + * value, and a "current" value. PR_SET_TIMERSLACK sets the "current" + * timer slack value for the calling thread. + * 2)When a new thread is created, the two timer slack values are made + * the same as the "current" value of the creating thread. + * 3)The maximum timer slack value is ULONG_MAX. On 32bit machines, it + * is a valid value(about 4s). On 64bit machines, it is about 500 years + * and no person will set this over 4s. prctl return value is int, so + * we test themaximum value is INT_MAX. + * 4)we also check current value via /proc/self/timerslack_ns if it is + * supported. + */ + +#include +#include +#include +#include +#include +#include "lapi/syscalls.h" +#include "lapi/prctl.h" +#include "tst_test.h" + +#define PROC_TIMERSLACK_PATH "/proc/self/timerslack_ns" + +static void check_reset_timerslack(char *message); +static void check_get_timerslack(char *message, unsigned long value); +static void check_inherit_timerslack(char *message, unsigned long value); +static unsigned long origin_value; + +static struct tcase { + void (*func_check)(); + unsigned long setvalue; + unsigned long expvalue; + char message[50]; +} tcases[] = { + {check_reset_timerslack, 0, 50000, "Reset"}, + {check_get_timerslack, 1, 1, "Min"}, + {check_get_timerslack, 70000, 70000, "Middle"}, + {check_get_timerslack, INT_MAX, INT_MAX, "Max"}, + {check_inherit_timerslack, 70000, 70000, "Child process"}, +}; + +static int proc_flag = 1; + +static void check_reset_timerslack(char *message) +{ + check_get_timerslack(message, origin_value); +} + +static void check_proc_timerslack(char *message, unsigned long value) +{ + unsigned long proc_value; + + SAFE_FILE_SCANF(PROC_TIMERSLACK_PATH, "%lu", &proc_value); + if (proc_value == value) + tst_res(TPASS, "%s %s got %lu expectedly", + message, PROC_TIMERSLACK_PATH, proc_value); + else + tst_res(TFAIL, "%s %s expected %lu got %lu", + message, PROC_TIMERSLACK_PATH, value, proc_value); +} + +static void check_get_timerslack(char *message, unsigned long value) +{ + TEST(prctl(PR_GET_TIMERSLACK)); + if ((unsigned long)TST_RET == value) + tst_res(TPASS, "%s prctl(PR_GET_TIMERSLACK) got %lu expectedly", + message, value); + else + tst_res(TFAIL, "%s prctl(PR_GET_TIMERSLACK) expected %lu got %lu", + message, value, TST_RET); + + if (proc_flag) + check_proc_timerslack(message, value); + +} + +static void check_inherit_timerslack(char *message, unsigned long value) +{ + int pid; + unsigned long current_value; + unsigned long default_value; + + pid = SAFE_FORK(); + if (pid == 0) { + current_value = prctl(PR_GET_TIMERSLACK); + prctl(PR_SET_TIMERSLACK, 0); + default_value = prctl(PR_GET_TIMERSLACK); + if (current_value == value && default_value == value) + tst_res(TPASS, + "%s two timer slack values are made the same as the current value(%lu) of the creating thread.", + message, value); + else + tst_res(TFAIL, + "%s current_value is %lu, default value is %lu, the parent current value is %lu", + message, current_value, default_value, value); + } + +} + +static void verify_prctl(unsigned int n) +{ + struct tcase *tc = &tcases[n]; + + TEST(prctl(PR_SET_TIMERSLACK, tc->setvalue)); + if (TST_RET == -1) { + tst_res(TFAIL | TTERRNO, "prctl(PR_SET_TIMERSLACK, %lu) failed", + tc->setvalue); + return; + } + + tst_res(TPASS, "prctl(PR_SET_TIMERSLACK, %lu) succeed", tc->setvalue); + tc->func_check(tc->message, tc->expvalue); +} + +static void setup(void) +{ + if (access(PROC_TIMERSLACK_PATH, F_OK) == -1) { + tst_res(TCONF, "proc doesn't support timerslack_ns interface"); + proc_flag = 0; + } + + TEST(prctl(PR_GET_TIMERSLACK)); + origin_value = TST_RET; + tst_res(TINFO, "current timerslack value is %lu", origin_value); +} + +static struct tst_test test = { + .setup = setup, + .test = verify_prctl, + .tcnt = ARRAY_SIZE(tcases), + .forks_child = 1, +}; -- 2.18.0