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perf callchain: Support x86 target platform 

Support x86(32-bit) cross platform callchain unwind.

Signed-off-by: He Kuang <hekuang@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1464924803-22214-14-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
He Kuang 2016-06-03 03:33:22 +00:00 committed by Arnaldo Carvalho de Melo
parent 19473e7ba8
commit 52ffe0ff02
5 changed files with 63 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/arch/x86/util/unwind-libunwind.c
View File

@ -1,12 +1,14 @@
#ifndef REMOTE_UNWIND_LIBUNWIND
#include <errno.h>
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
#include "../../util/debug.h"
#endif
#ifdef HAVE_ARCH_X86_64_SUPPORT
int libunwind__arch_reg_id(int regnum)
int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;
@ -70,7 +72,7 @@ int libunwind__arch_reg_id(int regnum)
return id;
}
#else
int libunwind__arch_reg_id(int regnum)
int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;

8
tools/perf/config/Makefile
View File

@ -354,6 +354,14 @@ 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

1
tools/perf/util/Build
View File

@ -101,6 +101,7 @@ libperf-$(CONFIG_DWARF) += dwarf-aux.o
libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
libperf-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
libperf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o

37
tools/perf/util/libunwind/x86_32.c Normal file
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@ -0,0 +1,37 @@
/*
* This file setups defines to compile arch specific binary from the
* generic one.
*
* The function 'LIBUNWIND__ARCH_REG_ID' name is set according to arch
* name and the defination of this function is included directly from
* 'arch/x86/util/unwind-libunwind.c', to make sure that this function
* is defined no matter what arch the host is.
*
* Finally, the arch specific unwind methods are exported which will
* be assigned to each x86 thread.
*/
#define REMOTE_UNWIND_LIBUNWIND
#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__x86_reg_id(regnum)
#include "unwind.h"
#include "debug.h"
#include "libunwind-x86.h"
#include <../../../../arch/x86/include/uapi/asm/perf_regs.h>
/* HAVE_ARCH_X86_64_SUPPORT is used in'arch/x86/util/unwind-libunwind.c'
* for x86_32, we undef it to compile code for x86_32 only.
*/
#undef HAVE_ARCH_X86_64_SUPPORT
#include "../../arch/x86/util/unwind-libunwind.c"
/* Explicitly define NO_LIBUNWIND_DEBUG_FRAME, because non-ARM has no
* dwarf_find_debug_frame() function.
*/
#ifndef NO_LIBUNWIND_DEBUG_FRAME
#define NO_LIBUNWIND_DEBUG_FRAME
#endif
#include "util/unwind-libunwind-local.c"
struct unwind_libunwind_ops *
x86_32_unwind_libunwind_ops = &_unwind_libunwind_ops;

15
tools/perf/util/unwind-libunwind.c
View File

@ -5,6 +5,7 @@
#include "arch/common.h"
struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
static void unwind__register_ops(struct thread *thread,
struct unwind_libunwind_ops *ops)
@ -16,6 +17,7 @@ int unwind__prepare_access(struct thread *thread, struct map *map)
{
const char *arch;
enum dso_type dso_type;
struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
if (thread->addr_space) {
pr_debug("unwind: thread map already set, dso=%s\n",
@ -32,9 +34,18 @@ int unwind__prepare_access(struct thread *thread, struct map *map)
return 0;
arch = normalize_arch(thread->mg->machine->env->arch);
pr_debug("unwind: target platform=%s\n", arch);
if (!strcmp(arch, "x86")) {
if (dso_type != DSO__TYPE_64BIT)
ops = x86_32_unwind_libunwind_ops;
}
if (!ops) {
pr_err("unwind: target platform=%s is not supported\n", arch);
return -1;
}
out_register:
unwind__register_ops(thread, local_unwind_libunwind_ops);
unwind__register_ops(thread, ops);
return thread->unwind_libunwind_ops->prepare_access(thread);
}