1 // SPDX-License-Identifier: GPL-2.0
9 #include "tests/tests.h"
10 #include "arch-tests.h"
12 #define STACK_SIZE 8192
14 static int sample_ustack(struct perf_sample *sample,
15 struct thread *thread, u64 *regs)
17 struct stack_dump *stack = &sample->user_stack;
22 buf = malloc(STACK_SIZE);
24 pr_debug("failed to allocate sample uregs data\n");
28 sp = (unsigned long) regs[PERF_REG_X86_SP];
30 map = maps__find(thread->maps, (u64)sp);
32 pr_debug("failed to get stack map\n");
37 stack_size = map->end - sp;
38 stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
40 memcpy(buf, (void *) sp, stack_size);
41 #ifdef MEMORY_SANITIZER
43 * Copying the stack may copy msan poison, avoid false positives in the
44 * unwinder by removing the poison here.
46 __msan_unpoison(buf, stack_size);
48 stack->data = (char *) buf;
49 stack->size = stack_size;
53 int test__arch_unwind_sample(struct perf_sample *sample,
54 struct thread *thread)
56 struct regs_dump *regs = &sample->user_regs;
59 buf = malloc(sizeof(u64) * PERF_REGS_MAX);
61 pr_debug("failed to allocate sample uregs data\n");
65 #ifdef MEMORY_SANITIZER
67 * Assignments to buf in the assembly function perf_regs_load aren't
68 * seen by memory sanitizer. Zero the memory to convince memory
69 * sanitizer the memory is initialized.
71 memset(buf, 0, sizeof(u64) * PERF_REGS_MAX);
74 regs->abi = PERF_SAMPLE_REGS_ABI;
76 regs->mask = PERF_REGS_MASK;
78 return sample_ustack(sample, thread, buf);