mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-08 19:44:10 +08:00
perf callchain: Separate perf_reg_value function in perf_regs object
Making perf_reg_value function global (formely reg_value), because it's going to be used globaly across all code providing the dwarf post unwind feature. Changing its prototype to be generic: -int reg_value(unw_word_t *valp, struct regs_dump *regs, int id) +int perf_reg_value(u64 *valp, struct regs_dump *regs, int id); Changing the valp type from libunwind specific 'unw_word_t' to u64. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Jean Pihet <jean.pihet@linaro.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1389098853-14466-13-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
9ff125d132
commit
c9b951c4d1
@ -538,6 +538,7 @@ ifeq ($(NO_PERF_REGS),0)
|
||||
ifeq ($(ARCH),x86)
|
||||
LIB_H += arch/x86/include/perf_regs.h
|
||||
endif
|
||||
LIB_OBJS += $(OUTPUT)util/perf_regs.o
|
||||
endif
|
||||
|
||||
ifndef NO_LIBNUMA
|
||||
|
19
tools/perf/util/perf_regs.c
Normal file
19
tools/perf/util/perf_regs.c
Normal file
@ -0,0 +1,19 @@
|
||||
#include <errno.h>
|
||||
#include "perf_regs.h"
|
||||
|
||||
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
|
||||
{
|
||||
int i, idx = 0;
|
||||
u64 mask = regs->mask;
|
||||
|
||||
if (!(mask & (1 << id)))
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < id; i++) {
|
||||
if (mask & (1 << i))
|
||||
idx++;
|
||||
}
|
||||
|
||||
*valp = regs->regs[idx];
|
||||
return 0;
|
||||
}
|
@ -1,8 +1,14 @@
|
||||
#ifndef __PERF_REGS_H
|
||||
#define __PERF_REGS_H
|
||||
|
||||
#include "types.h"
|
||||
#include "event.h"
|
||||
|
||||
#ifdef HAVE_PERF_REGS_SUPPORT
|
||||
#include <perf_regs.h>
|
||||
|
||||
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
|
||||
|
||||
#else
|
||||
#define PERF_REGS_MASK 0
|
||||
|
||||
@ -10,5 +16,12 @@ static inline const char *perf_reg_name(int id __maybe_unused)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int perf_reg_value(u64 *valp __maybe_unused,
|
||||
struct regs_dump *regs __maybe_unused,
|
||||
int id __maybe_unused)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif /* HAVE_PERF_REGS_SUPPORT */
|
||||
#endif /* __PERF_REGS_H */
|
||||
|
@ -390,30 +390,13 @@ static int access_dso_mem(struct unwind_info *ui, unw_word_t addr,
|
||||
return !(size == sizeof(*data));
|
||||
}
|
||||
|
||||
static int reg_value(unw_word_t *valp, struct regs_dump *regs, int id)
|
||||
{
|
||||
int i, idx = 0;
|
||||
u64 mask = regs->mask;
|
||||
|
||||
if (!(mask & (1 << id)))
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < id; i++) {
|
||||
if (mask & (1 << i))
|
||||
idx++;
|
||||
}
|
||||
|
||||
*valp = regs->regs[idx];
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int access_mem(unw_addr_space_t __maybe_unused as,
|
||||
unw_word_t addr, unw_word_t *valp,
|
||||
int __write, void *arg)
|
||||
{
|
||||
struct unwind_info *ui = arg;
|
||||
struct stack_dump *stack = &ui->sample->user_stack;
|
||||
unw_word_t start, end;
|
||||
u64 start, end;
|
||||
int offset;
|
||||
int ret;
|
||||
|
||||
@ -423,7 +406,7 @@ static int access_mem(unw_addr_space_t __maybe_unused as,
|
||||
return 0;
|
||||
}
|
||||
|
||||
ret = reg_value(&start, &ui->sample->user_regs, PERF_REG_SP);
|
||||
ret = perf_reg_value(&start, &ui->sample->user_regs, PERF_REG_SP);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
@ -436,8 +419,9 @@ static int access_mem(unw_addr_space_t __maybe_unused as,
|
||||
if (addr < start || addr + sizeof(unw_word_t) >= end) {
|
||||
ret = access_dso_mem(ui, addr, valp);
|
||||
if (ret) {
|
||||
pr_debug("unwind: access_mem %p not inside range %p-%p\n",
|
||||
(void *)addr, (void *)start, (void *)end);
|
||||
pr_debug("unwind: access_mem %p not inside range"
|
||||
" 0x%" PRIx64 "-0x%" PRIx64 "\n",
|
||||
(void *) addr, start, end);
|
||||
*valp = 0;
|
||||
return ret;
|
||||
}
|
||||
@ -446,8 +430,8 @@ static int access_mem(unw_addr_space_t __maybe_unused as,
|
||||
|
||||
offset = addr - start;
|
||||
*valp = *(unw_word_t *)&stack->data[offset];
|
||||
pr_debug("unwind: access_mem addr %p, val %lx, offset %d\n",
|
||||
(void *)addr, (unsigned long)*valp, offset);
|
||||
pr_debug("unwind: access_mem addr %p val %lx, offset %d\n",
|
||||
(void *) addr, (unsigned long)*valp, offset);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -457,6 +441,7 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
|
||||
{
|
||||
struct unwind_info *ui = arg;
|
||||
int id, ret;
|
||||
u64 val;
|
||||
|
||||
/* Don't support write, I suspect we don't need it. */
|
||||
if (__write) {
|
||||
@ -473,12 +458,13 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
|
||||
if (id < 0)
|
||||
return -EINVAL;
|
||||
|
||||
ret = reg_value(valp, &ui->sample->user_regs, id);
|
||||
ret = perf_reg_value(&val, &ui->sample->user_regs, id);
|
||||
if (ret) {
|
||||
pr_err("unwind: can't read reg %d\n", regnum);
|
||||
return ret;
|
||||
}
|
||||
|
||||
*valp = (unw_word_t) val;
|
||||
pr_debug("unwind: reg %d, val %lx\n", regnum, (unsigned long)*valp);
|
||||
return 0;
|
||||
}
|
||||
@ -572,7 +558,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
|
||||
struct machine *machine, struct thread *thread,
|
||||
struct perf_sample *data, int max_stack)
|
||||
{
|
||||
unw_word_t ip;
|
||||
u64 ip;
|
||||
struct unwind_info ui = {
|
||||
.sample = data,
|
||||
.thread = thread,
|
||||
@ -583,7 +569,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
|
||||
if (!data->user_regs.regs)
|
||||
return -EINVAL;
|
||||
|
||||
ret = reg_value(&ip, &data->user_regs, PERF_REG_IP);
|
||||
ret = perf_reg_value(&ip, &data->user_regs, PERF_REG_IP);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user