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#include "arch-tests.h"
9
10#define STACK_SIZE 8192
11
12static int sample_ustack(struct perf_sample *sample,
13			 struct thread *thread, u64 *regs)
14{
15	struct stack_dump *stack = &sample->user_stack;
16	struct map *map;
17	unsigned long sp;
18	u64 stack_size, *buf;
19
20	buf = malloc(STACK_SIZE);
21	if (!buf) {
22		pr_debug("failed to allocate sample uregs data\n");
23		return -1;
24	}
25
26	sp = (unsigned long) regs[PERF_REG_X86_SP];
27
28	map = map_groups__find(thread->mg, MAP__VARIABLE, (u64) sp);
29	if (!map) {
30		pr_debug("failed to get stack map\n");
31		free(buf);
32		return -1;
33	}
34
35	stack_size = map->end - sp;
36	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
37
38	memcpy(buf, (void *) sp, stack_size);
39	stack->data = (char *) buf;
40	stack->size = stack_size;
41	return 0;
42}
43
44int test__arch_unwind_sample(struct perf_sample *sample,
45			     struct thread *thread)
46{
47	struct regs_dump *regs = &sample->user_regs;
48	u64 *buf;
49
50	buf = malloc(sizeof(u64) * PERF_REGS_MAX);
51	if (!buf) {
52		pr_debug("failed to allocate sample uregs data\n");
53		return -1;
54	}
55
56	perf_regs_load(buf);
57	regs->abi  = PERF_SAMPLE_REGS_ABI;
58	regs->regs = buf;
59	regs->mask = PERF_REGS_MASK;
60
61	return sample_ustack(sample, thread, buf);
62}
63