Merge branch 'akpm' (patches from Andrew)
[sfrench/cifs-2.6.git] / tools / perf / arch / arm64 / tests / dwarf-unwind.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <string.h>
3 #include "perf_regs.h"
4 #include "thread.h"
5 #include "map.h"
6 #include "map_groups.h"
7 #include "event.h"
8 #include "debug.h"
9 #include "tests/tests.h"
10
11 #define STACK_SIZE 8192
12
13 static int sample_ustack(struct perf_sample *sample,
14                 struct thread *thread, u64 *regs)
15 {
16         struct stack_dump *stack = &sample->user_stack;
17         struct map *map;
18         unsigned long sp;
19         u64 stack_size, *buf;
20
21         buf = malloc(STACK_SIZE);
22         if (!buf) {
23                 pr_debug("failed to allocate sample uregs data\n");
24                 return -1;
25         }
26
27         sp = (unsigned long) regs[PERF_REG_ARM64_SP];
28
29         map = map_groups__find(thread->mg, (u64)sp);
30         if (!map) {
31                 pr_debug("failed to get stack map\n");
32                 free(buf);
33                 return -1;
34         }
35
36         stack_size = map->end - sp;
37         stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
38
39         memcpy(buf, (void *) sp, stack_size);
40         stack->data = (char *) buf;
41         stack->size = stack_size;
42         return 0;
43 }
44
45 int test__arch_unwind_sample(struct perf_sample *sample,
46                 struct thread *thread)
47 {
48         struct regs_dump *regs = &sample->user_regs;
49         u64 *buf;
50
51         buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
52         if (!buf) {
53                 pr_debug("failed to allocate sample uregs data\n");
54                 return -1;
55         }
56
57         perf_regs_load(buf);
58         regs->abi  = PERF_SAMPLE_REGS_ABI;
59         regs->regs = buf;
60         regs->mask = PERF_REGS_MASK;
61
62         return sample_ustack(sample, thread, buf);
63 }