64 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <string.h>3#include "perf_regs.h"4#include "thread.h"5#include "map.h"6#include "maps.h"7#include "event.h"8#include "debug.h"9#include "tests/tests.h"10 11#define STACK_SIZE 819212 13static 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 = maps__find(thread__maps(thread), (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(map) - 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 45int 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}64