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aa16b81f JO |
1 | #include <string.h> |
2 | #include "perf_regs.h" | |
3 | #include "thread.h" | |
4 | #include "map.h" | |
5 | #include "event.h" | |
6 | #include "tests/tests.h" | |
7 | ||
8 | #define STACK_SIZE 8192 | |
9 | ||
10 | static int sample_ustack(struct perf_sample *sample, | |
11 | struct thread *thread, u64 *regs) | |
12 | { | |
13 | struct stack_dump *stack = &sample->user_stack; | |
14 | struct map *map; | |
15 | unsigned long sp; | |
16 | u64 stack_size, *buf; | |
17 | ||
18 | buf = malloc(STACK_SIZE); | |
19 | if (!buf) { | |
20 | pr_debug("failed to allocate sample uregs data\n"); | |
21 | return -1; | |
22 | } | |
23 | ||
24 | sp = (unsigned long) regs[PERF_REG_X86_SP]; | |
25 | ||
26 | map = map_groups__find(&thread->mg, MAP__FUNCTION, (u64) sp); | |
27 | if (!map) { | |
28 | pr_debug("failed to get stack map\n"); | |
763d7f5f | 29 | free(buf); |
aa16b81f JO |
30 | return -1; |
31 | } | |
32 | ||
33 | stack_size = map->end - sp; | |
34 | stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size; | |
35 | ||
36 | memcpy(buf, (void *) sp, stack_size); | |
37 | stack->data = (char *) buf; | |
38 | stack->size = stack_size; | |
39 | return 0; | |
40 | } | |
41 | ||
42 | int test__arch_unwind_sample(struct perf_sample *sample, | |
43 | struct thread *thread) | |
44 | { | |
45 | struct regs_dump *regs = &sample->user_regs; | |
46 | u64 *buf; | |
47 | ||
48 | buf = malloc(sizeof(u64) * PERF_REGS_MAX); | |
49 | if (!buf) { | |
50 | pr_debug("failed to allocate sample uregs data\n"); | |
51 | return -1; | |
52 | } | |
53 | ||
54 | perf_regs_load(buf); | |
55 | regs->abi = PERF_SAMPLE_REGS_ABI; | |
56 | regs->regs = buf; | |
352ea45a | 57 | regs->mask = PERF_REGS_MASK; |
aa16b81f JO |
58 | |
59 | return sample_ustack(sample, thread, buf); | |
60 | } |