1 // SPDX-License-Identifier: GPL-2.0
9 #include "tests/tests.h"
11 #define STACK_SIZE 8192
13 static int sample_ustack(struct perf_sample *sample,
14 struct thread *thread, u64 *regs)
16 struct stack_dump *stack = &sample->user_stack;
21 buf = malloc(STACK_SIZE);
23 pr_debug("failed to allocate sample uregs data\n");
27 sp = (unsigned long) regs[PERF_REG_X86_SP];
29 map = maps__find(thread->maps, (u64)sp);
31 pr_debug("failed to get stack map\n");
36 stack_size = map->end - sp;
37 stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
39 memcpy(buf, (void *) sp, stack_size);
40 #ifdef MEMORY_SANITIZER
42 * Copying the stack may copy msan poison, avoid false positives in the
43 * unwinder by removing the poison here.
45 __msan_unpoison(buf, stack_size);
47 stack->data = (char *) buf;
48 stack->size = stack_size;
52 int test__arch_unwind_sample(struct perf_sample *sample,
53 struct thread *thread)
55 struct regs_dump *regs = &sample->user_regs;
58 buf = malloc(sizeof(u64) * PERF_REGS_MAX);
60 pr_debug("failed to allocate sample uregs data\n");
64 #ifdef MEMORY_SANITIZER
66 * Assignments to buf in the assembly function perf_regs_load aren't
67 * seen by memory sanitizer. Zero the memory to convince memory
68 * sanitizer the memory is initialized.
70 memset(buf, 0, sizeof(u64) * PERF_REGS_MAX);
73 regs->abi = PERF_SAMPLE_REGS_ABI;
75 regs->mask = PERF_REGS_MASK;
77 return sample_ustack(sample, thread, buf);