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[sagit-ice-cold/kernel_xiaomi_msm8998.git] / tools / perf / arch / x86 / tests / dwarf-unwind.c
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__VARIABLE, (u64) sp);
27         if (!map) {
28                 pr_debug("failed to get stack map\n");
29                 free(buf);
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;
57         regs->mask = PERF_REGS_MASK;
58
59         return sample_ustack(sample, thread, buf);
60 }