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 12 static 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 44 int 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