From: He Kuang <hekuang@huawei.com>
To: <peterz@infradead.org>, <mingo@redhat.com>, <acme@kernel.org>,
<alexander.shishkin@linux.intel.com>, <jolsa@redhat.com>,
<wangnan0@huawei.com>, <hekuang@huawei.com>,
<jpoimboe@redhat.com>, <ak@linux.intel.com>, <eranian@google.com>,
<namhyung@kernel.org>, <adrian.hunter@intel.com>,
<sukadev@linux.vnet.ibm.com>, <masami.hiramatsu.pt@hitachi.com>,
<tumanova@linux.vnet.ibm.com>, <kan.liang@intel.com>,
<penberg@kernel.org>, <dsahern@gmail.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: [PATCH v6 08/11] perf tools: Show warnings for unsupported cross-platform unwind
Date: Sat, 28 May 2016 11:59:57 +0000 [thread overview]
Message-ID: <1464436800-39860-9-git-send-email-hekuang@huawei.com> (raw)
In-Reply-To: <1464436800-39860-1-git-send-email-hekuang@huawei.com>
Currently, perf script uses host unwind methods to parse perf.data
callchain info regardless of the target architecture. So we get wrong
result without any warnings when unwinding callchains of x86(32-bit)
on x86(64-bit) machine.
This patch shows warning messages when we do remote unwind x86(32-bit)
on other machines. Same thing for other platforms will be added in
next patches.
Signed-off-by: He Kuang <hekuang@huawei.com>
---
tools/perf/config/Makefile | 8 ++++++++
tools/perf/util/thread.c | 2 +-
tools/perf/util/unwind-libunwind.c | 30 +++++++++++++++++++++++++++++-
tools/perf/util/unwind.h | 5 +++--
4 files changed, 41 insertions(+), 4 deletions(-)
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 3a304a3..e156f76 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -355,6 +355,14 @@ endif
ifndef NO_LIBUNWIND
have_libunwind :=
+
+ ifeq ($(feature-libunwind-x86), 1)
+ $(call detected,CONFIG_LIBUNWIND_X86)
+ CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT
+ LDFLAGS += -lunwind-x86
+ have_libunwind = 1
+ endif
+
ifneq ($(feature-libunwind), 1)
msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
NO_LOCAL_LIBUNWIND := 1
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 045477d..7ffee25 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -203,7 +203,7 @@ void thread__insert_map(struct thread *thread, struct map *map)
map_groups__fixup_overlappings(thread->mg, map, stderr);
map_groups__insert(thread->mg, map);
- unwind__prepare_access(thread);
+ unwind__prepare_access(thread, map);
}
static int thread__clone_map_groups(struct thread *thread,
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 40d0453..037ee72 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -1,8 +1,36 @@
#include "unwind.h"
#include "thread.h"
+#include "session.h"
+#include "debug.h"
+#include "arch/common.h"
-int unwind__prepare_access(struct thread *thread)
+int unwind__prepare_access(struct thread *thread, struct map *map)
{
+ const char *arch;
+ enum dso_type dso_type;
+
+ if (!thread->mg->machine->env)
+ return -1;
+
+ dso_type = dso__type(map->dso, thread->mg->machine);
+ if (dso_type == DSO__TYPE_UNKNOWN)
+ return -1;
+
+ if (thread->addr_space)
+ pr_debug("unwind: thread map already set, 64bit is %d, dso=%s\n",
+ dso_type == DSO__TYPE_64BIT, map->dso->name);
+
+ arch = normalize_arch(thread->mg->machine->env->arch);
+
+ if (!strcmp(arch, "x86")) {
+ if (dso_type != DSO__TYPE_64BIT)
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+ pr_err("unwind: target platform=%s is not implemented\n", arch);
+#else
+ pr_err("unwind: target platform=%s is not supported\n", arch);
+#endif
+ }
+
register_local_unwind_libunwind_ops(thread);
return thread->unwind_libunwind_ops->prepare_access(thread);
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index 0122797..4de423c 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -22,11 +22,12 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
/* libunwind specific */
#ifdef HAVE_LIBUNWIND_SUPPORT
int libunwind__arch_reg_id(int regnum);
-int unwind__prepare_access(struct thread *thread);
+int unwind__prepare_access(struct thread *thread, struct map *map);
void unwind__flush_access(struct thread *thread);
void unwind__finish_access(struct thread *thread);
#else
-static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
+static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
+ struct map *map __maybe_unused)
{
return 0;
}
--
1.8.5.2
next prev parent reply other threads:[~2016-05-28 12:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-28 11:59 [PATCH v6 00/11] Add support for remote unwind He Kuang
2016-05-28 11:59 ` [PATCH v6 01/11] perf tools: Use LIBUNWIND_DIR for remote libunwind feature check He Kuang
2016-05-28 11:59 ` [PATCH v6 02/11] perf tools: Decouple thread->address_space on libunwind He Kuang
2016-05-28 11:59 ` [PATCH v6 03/11] perf tools: Introducing struct unwind_libunwind_ops for local unwind He Kuang
2016-05-30 8:53 ` Jiri Olsa
2016-05-28 11:59 ` [PATCH v6 04/11] perf tools: Move unwind__prepare_access from thread_new into thread__insert_map He Kuang
2016-05-30 8:52 ` Jiri Olsa
2016-05-28 11:59 ` [PATCH v6 05/11] perf tools: Separate local/remote libunwind config He Kuang
2016-05-30 8:52 ` Jiri Olsa
2016-05-28 11:59 ` [PATCH v6 06/11] perf tools: Extract local libunwind code out of unwind-libunwind.c He Kuang
2016-05-28 12:10 ` Wangnan (F)
2016-05-30 3:22 ` [PATCH v6 06/11 1 update 1/2] perf tools: Rename unwind-libunwind.c to unwind-libunwind-local.c He Kuang
2016-05-30 3:22 ` [PATCH v6 06/11 1 update 2/2] perf tools: Extract common API out of unwind-libunwind-local.c He Kuang
2016-05-30 3:24 ` [PATCH v6 06/11] perf tools: Extract local libunwind code out of unwind-libunwind.c Hekuang
2016-05-28 11:59 ` [PATCH v6 07/11] perf tools: Export normalize_arch() function He Kuang
2016-05-28 11:59 ` He Kuang [this message]
2016-05-30 8:53 ` [PATCH v6 08/11] perf tools: Show warnings for unsupported cross-platform unwind Jiri Olsa
2016-05-28 11:59 ` [PATCH v6 09/11] perf tools: Change fixed name of libunwind__arch_reg_id to macro He Kuang
2016-05-28 11:59 ` [PATCH v6 10/11] perf callchain: Support x86 target platform He Kuang
2016-05-30 8:52 ` Jiri Olsa
2016-05-30 8:53 ` Jiri Olsa
2016-05-30 8:53 ` Jiri Olsa
2016-05-30 9:11 ` Hekuang
2016-05-30 9:30 ` Jiri Olsa
2016-05-30 10:58 ` Hekuang
2016-05-30 14:24 ` Jiri Olsa
2016-05-28 12:00 ` [PATCH v6 11/11] perf callchain: Support aarch64 cross-platform He Kuang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1464436800-39860-9-git-send-email-hekuang@huawei.com \
--to=hekuang@huawei.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=dsahern@gmail.com \
--cc=eranian@google.com \
--cc=jolsa@redhat.com \
--cc=jpoimboe@redhat.com \
--cc=kan.liang@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=masami.hiramatsu.pt@hitachi.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=penberg@kernel.org \
--cc=peterz@infradead.org \
--cc=sukadev@linux.vnet.ibm.com \
--cc=tumanova@linux.vnet.ibm.com \
--cc=wangnan0@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).