Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jiri Olsa |
255 |
84.72% |
3 |
20.00% |
| Ian Rogers |
27 |
8.97% |
5 |
33.33% |
| Arnaldo Carvalho de Melo |
13 |
4.32% |
5 |
33.33% |
| Masanari Iida |
5 |
1.66% |
1 |
6.67% |
| Greg Kroah-Hartman |
1 |
0.33% |
1 |
6.67% |
| Total |
301 |
|
15 |
|
// SPDX-License-Identifier: GPL-2.0
#include <string.h>
#include "perf_regs.h"
#include "thread.h"
#include "map.h"
#include "maps.h"
#include "event.h"
#include "debug.h"
#include "tests/tests.h"
#define STACK_SIZE 8192
static int sample_ustack(struct perf_sample *sample,
struct thread *thread, u64 *regs)
{
struct stack_dump *stack = &sample->user_stack;
struct map *map;
unsigned long sp;
u64 stack_size, *buf;
buf = malloc(STACK_SIZE);
if (!buf) {
pr_debug("failed to allocate sample uregs data\n");
return -1;
}
sp = (unsigned long) regs[PERF_REG_X86_SP];
map = maps__find(thread__maps(thread), (u64)sp);
if (!map) {
pr_debug("failed to get stack map\n");
free(buf);
return -1;
}
stack_size = map__end(map) - sp;
map__put(map);
stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
memcpy(buf, (void *) sp, stack_size);
#ifdef MEMORY_SANITIZER
/*
* Copying the stack may copy msan poison, avoid false positives in the
* unwinder by removing the poison here.
*/
__msan_unpoison(buf, stack_size);
#endif
stack->data = (char *) buf;
stack->size = stack_size;
return 0;
}
int test__arch_unwind_sample(struct perf_sample *sample,
struct thread *thread)
{
struct regs_dump *regs = perf_sample__user_regs(sample);
u64 *buf = calloc(PERF_REGS_MAX, sizeof(u64));
if (!buf) {
pr_debug("failed to allocate sample uregs data\n");
return -1;
}
perf_regs_load(buf);
regs->abi = PERF_SAMPLE_REGS_ABI;
regs->regs = buf;
regs->mask = PERF_REGS_MASK;
return sample_ustack(sample, thread, buf);
}