f83c04156c
Currently, libunwind operations are fixed, and they are chosen according to the host architecture. This will lead to a problem that if a thread is run as x86_32 on a x86_64 machine, perf will use libunwind methods for x86_64 to parse the callchain and get wrong results. This patch changes the fixed methods of libunwind operations to be thread/map related, and each thread can have individual libunwind operations. Local libunwind methods are registered as default value. Signed-off-by: He Kuang <hekuang@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> 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/1464924803-22214-4-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
#ifndef __UNWIND_H
|
|
#define __UNWIND_H
|
|
|
|
#include <linux/types.h>
|
|
#include "event.h"
|
|
#include "symbol.h"
|
|
#include "thread.h"
|
|
|
|
struct unwind_entry {
|
|
struct map *map;
|
|
struct symbol *sym;
|
|
u64 ip;
|
|
};
|
|
|
|
typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
|
|
|
|
struct unwind_libunwind_ops {
|
|
int (*prepare_access)(struct thread *thread);
|
|
void (*flush_access)(struct thread *thread);
|
|
void (*finish_access)(struct thread *thread);
|
|
int (*get_entries)(unwind_entry_cb_t cb, void *arg,
|
|
struct thread *thread,
|
|
struct perf_sample *data, int max_stack);
|
|
};
|
|
|
|
#ifdef HAVE_DWARF_UNWIND_SUPPORT
|
|
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
|
|
struct thread *thread,
|
|
struct perf_sample *data, int max_stack);
|
|
/* libunwind specific */
|
|
#ifdef HAVE_LIBUNWIND_SUPPORT
|
|
int libunwind__arch_reg_id(int regnum);
|
|
int unwind__prepare_access(struct thread *thread);
|
|
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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
|
|
static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
|
|
#endif
|
|
#else
|
|
static inline int
|
|
unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
|
|
void *arg __maybe_unused,
|
|
struct thread *thread __maybe_unused,
|
|
struct perf_sample *data __maybe_unused,
|
|
int max_stack __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
|
|
static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
|
|
#endif /* HAVE_DWARF_UNWIND_SUPPORT */
|
|
#endif /* __UNWIND_H */
|