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Message-ID: <1464081629-137191-5-git-send-email-hekuang@huawei.com>
Date: Tue, 24 May 2016 09:20:28 +0000
From: He Kuang <hekuang@...wei.com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
<alexander.shishkin@...ux.intel.com>, <jolsa@...hat.com>,
<wangnan0@...wei.com>, <hekuang@...wei.com>, <jpoimboe@...hat.com>,
<ak@...ux.intel.com>, <eranian@...gle.com>, <namhyung@...nel.org>,
<adrian.hunter@...el.com>, <sukadev@...ux.vnet.ibm.com>,
<masami.hiramatsu.pt@...achi.com>, <tumanova@...ux.vnet.ibm.com>,
<kan.liang@...el.com>, <penberg@...nel.org>, <dsahern@...il.com>
CC: <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 4/5] perf callchain: Support x86 target platform
Support x86(32-bit) cross platform callchain unwind.
Signed-off-by: He Kuang <hekuang@...wei.com>
---
.../perf/arch/x86/include/libunwind/libunwind-arch.h | 18 ++++++++++++++++++
tools/perf/arch/x86/util/unwind-libunwind.c | 19 ++++++++++++++-----
tools/perf/util/Build | 6 ++++++
tools/perf/util/unwind-libunwind_common.c | 6 ++++--
tools/perf/util/unwind.h | 5 +++++
5 files changed, 47 insertions(+), 7 deletions(-)
create mode 100644 tools/perf/arch/x86/include/libunwind/libunwind-arch.h
diff --git a/tools/perf/arch/x86/include/libunwind/libunwind-arch.h b/tools/perf/arch/x86/include/libunwind/libunwind-arch.h
new file mode 100644
index 0000000..be8c675
--- /dev/null
+++ b/tools/perf/arch/x86/include/libunwind/libunwind-arch.h
@@ -0,0 +1,18 @@
+#ifndef _LIBUNWIND_ARCH_H
+#define _LIBUNWIND_ARCH_H
+
+#include <libunwind-x86.h>
+#include <../perf_regs.h>
+#include <../../../../../../arch/x86/include/uapi/asm/perf_regs.h>
+
+#define LIBUNWIND_X86_32
+int libunwind__x86_reg_id(int regnum);
+
+#define LIBUNWIND__ARCH_REG_ID libunwind__x86_reg_id
+
+#include <../../../x86/util/unwind-libunwind.c>
+
+#define UNWT_PREFIX UNW_PASTE(UNW_PASTE(_U, x86), _)
+#define UNWT_OBJ(fn) UNW_PASTE(UNWT_PREFIX, fn)
+
+#endif /* _LIBUNWIND_ARCH_H */
diff --git a/tools/perf/arch/x86/util/unwind-libunwind.c b/tools/perf/arch/x86/util/unwind-libunwind.c
index db25e93..28831d8 100644
--- a/tools/perf/arch/x86/util/unwind-libunwind.c
+++ b/tools/perf/arch/x86/util/unwind-libunwind.c
@@ -1,12 +1,18 @@
#include <errno.h>
+#if defined(LIBUNWIND_X86_32)
+#include <libunwind-x86.h>
+#elif defined(LIBUNWIND_X86_64)
+#include <libunwind-x86_64.h>
+#elif defined(HAVE_LIBUNWIND_LOCAL_SUPPORT)
#include <libunwind.h>
+#endif
#include "perf_regs.h"
#include "../../util/unwind.h"
#include "../../util/debug.h"
-#ifdef HAVE_ARCH_X86_64_SUPPORT
-int libunwind__arch_reg_id(int regnum)
+#if !defined(REMOTE_UNWIND_LIBUNWIND) && defined(HAVE_ARCH_X86_64_SUPPORT)
+int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;
@@ -69,8 +75,11 @@ int libunwind__arch_reg_id(int regnum)
return id;
}
-#else
-int libunwind__arch_reg_id(int regnum)
+#endif
+
+#if !defined(REMOTE_UNWIND_LIBUNWIND) && !defined(HAVE_ARCH_X86_64_SUPPORT) || \
+ defined(LIBUNWIND_X86_32)
+int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;
@@ -109,4 +118,4 @@ int libunwind__arch_reg_id(int regnum)
return id;
}
-#endif /* HAVE_ARCH_X86_64_SUPPORT */
+#endif
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index ce69721..2373130 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -1,3 +1,5 @@
+include ../scripts/Makefile.include
+
libperf-y += alias.o
libperf-y += annotate.o
libperf-y += build-id.o
@@ -101,6 +103,10 @@ libperf-$(CONFIG_DWARF) += dwarf-aux.o
libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind_common.o
+libperf-$(CONFIG_LIBUNWIND_X86) += unwind-libunwind_x86_32.o
+
+$(OUTPUT)util/unwind-libunwind_x86_32.o: util/unwind-libunwind.c arch/x86/util/unwind-libunwind.c
+ $(QUIET_CC)$(CC) $(CFLAGS) -DREMOTE_UNWIND_LIBUNWIND -Iarch/x86/include/libunwind -c -o $@ util/unwind-libunwind.c
libperf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
diff --git a/tools/perf/util/unwind-libunwind_common.c b/tools/perf/util/unwind-libunwind_common.c
index f44833b..619c6c0 100644
--- a/tools/perf/util/unwind-libunwind_common.c
+++ b/tools/perf/util/unwind-libunwind_common.c
@@ -82,9 +82,11 @@ void unwind__get_arch(struct thread *thread, struct map *map)
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);
-#endif
+ register_unwind_libunwind_ops(
+ &_Ux86_unwind_libunwind_ops, thread);
+#else
register_null_unwind_libunwind_ops(thread);
+#endif
use_local_unwind = 0;
}
}
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index e170be7..7dafb6e 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -56,6 +56,11 @@ static inline void unwind__get_arch(struct thread *thread __maybe_unused,
static inline void
register_null_unwind_libunwind_ops(struct thread *thread __maybe_unused) {}
#endif
+
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+extern struct unwind_libunwind_ops _Ux86_unwind_libunwind_ops;
+#endif
+
#else
static inline int
unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
--
1.8.5.2
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