1#include <string.h>
2#include "perf_regs.h"
3#include "thread.h"
4#include "map.h"
5#include "event.h"
6#include "debug.h"
7#include "tests/tests.h"
8
9#define STACK_SIZE 8192
10
11static int sample_ustack(struct perf_sample *sample,
12			 struct thread *thread, u64 *regs)
13{
14	struct stack_dump *stack = &sample->user_stack;
15	struct map *map;
16	unsigned long sp;
17	u64 stack_size, *buf;
18
19	buf = malloc(STACK_SIZE);
20	if (!buf) {
21		pr_debug("failed to allocate sample uregs data\n");
22		return -1;
23	}
24
25	sp = (unsigned long) regs[PERF_REG_X86_SP];
26
27	map = map_groups__find(thread->mg, MAP__VARIABLE, (u64) sp);
28	if (!map) {
29		pr_debug("failed to get stack map\n");
30		free(buf);
31		return -1;
32	}
33
34	stack_size = map->end - sp;
35	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
36
37	memcpy(buf, (void *) sp, stack_size);
38	stack->data = (char *) buf;
39	stack->size = stack_size;
40	return 0;
41}
42
43int test__arch_unwind_sample(struct perf_sample *sample,
44			     struct thread *thread)
45{
46	struct regs_dump *regs = &sample->user_regs;
47	u64 *buf;
48
49	buf = malloc(sizeof(u64) * PERF_REGS_MAX);
50	if (!buf) {
51		pr_debug("failed to allocate sample uregs data\n");
52		return -1;
53	}
54
55	perf_regs_load(buf);
56	regs->abi  = PERF_SAMPLE_REGS_ABI;
57	regs->regs = buf;
58	regs->mask = PERF_REGS_MASK;
59
60	return sample_ustack(sample, thread, buf);
61}
62