1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2aa16b81fSJiri Olsa #include <string.h> 3aa16b81fSJiri Olsa #include "perf_regs.h" 4aa16b81fSJiri Olsa #include "thread.h" 5aa16b81fSJiri Olsa #include "map.h" 6c54d241bSArnaldo Carvalho de Melo #include "maps.h" 7aa16b81fSJiri Olsa #include "event.h" 884f5d36fSJiri Olsa #include "debug.h" 9aa16b81fSJiri Olsa #include "tests/tests.h" 10d8b167f9SMatt Fleming #include "arch-tests.h" 11aa16b81fSJiri Olsa 12aa16b81fSJiri Olsa #define STACK_SIZE 8192 13aa16b81fSJiri Olsa 14aa16b81fSJiri Olsa static int sample_ustack(struct perf_sample *sample, 15aa16b81fSJiri Olsa struct thread *thread, u64 *regs) 16aa16b81fSJiri Olsa { 17aa16b81fSJiri Olsa struct stack_dump *stack = &sample->user_stack; 18aa16b81fSJiri Olsa struct map *map; 19aa16b81fSJiri Olsa unsigned long sp; 20aa16b81fSJiri Olsa u64 stack_size, *buf; 21aa16b81fSJiri Olsa 22aa16b81fSJiri Olsa buf = malloc(STACK_SIZE); 23aa16b81fSJiri Olsa if (!buf) { 24aa16b81fSJiri Olsa pr_debug("failed to allocate sample uregs data\n"); 25aa16b81fSJiri Olsa return -1; 26aa16b81fSJiri Olsa } 27aa16b81fSJiri Olsa 28aa16b81fSJiri Olsa sp = (unsigned long) regs[PERF_REG_X86_SP]; 29aa16b81fSJiri Olsa 30fe87797dSArnaldo Carvalho de Melo map = maps__find(thread->maps, (u64)sp); 31aa16b81fSJiri Olsa if (!map) { 32aa16b81fSJiri Olsa pr_debug("failed to get stack map\n"); 33763d7f5fSMasanari Iida free(buf); 34aa16b81fSJiri Olsa return -1; 35aa16b81fSJiri Olsa } 36aa16b81fSJiri Olsa 37aa16b81fSJiri Olsa stack_size = map->end - sp; 38aa16b81fSJiri Olsa stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size; 39aa16b81fSJiri Olsa 40aa16b81fSJiri Olsa memcpy(buf, (void *) sp, stack_size); 41aa16b81fSJiri Olsa stack->data = (char *) buf; 42aa16b81fSJiri Olsa stack->size = stack_size; 43aa16b81fSJiri Olsa return 0; 44aa16b81fSJiri Olsa } 45aa16b81fSJiri Olsa 46aa16b81fSJiri Olsa int test__arch_unwind_sample(struct perf_sample *sample, 47aa16b81fSJiri Olsa struct thread *thread) 48aa16b81fSJiri Olsa { 49aa16b81fSJiri Olsa struct regs_dump *regs = &sample->user_regs; 50aa16b81fSJiri Olsa u64 *buf; 51aa16b81fSJiri Olsa 52aa16b81fSJiri Olsa buf = malloc(sizeof(u64) * PERF_REGS_MAX); 53aa16b81fSJiri Olsa if (!buf) { 54aa16b81fSJiri Olsa pr_debug("failed to allocate sample uregs data\n"); 55aa16b81fSJiri Olsa return -1; 56aa16b81fSJiri Olsa } 57aa16b81fSJiri Olsa 58*0fb0d615SIan Rogers #ifdef MEMORY_SANITIZER 59*0fb0d615SIan Rogers /* 60*0fb0d615SIan Rogers * Assignments to buf in the assembly function perf_regs_load aren't 61*0fb0d615SIan Rogers * seen by memory sanitizer. Zero the memory to convince memory 62*0fb0d615SIan Rogers * sanitizer the memory is initialized. 63*0fb0d615SIan Rogers */ 64*0fb0d615SIan Rogers memset(buf, 0, sizeof(u64) * PERF_REGS_MAX); 65*0fb0d615SIan Rogers #endif 66aa16b81fSJiri Olsa perf_regs_load(buf); 67aa16b81fSJiri Olsa regs->abi = PERF_SAMPLE_REGS_ABI; 68aa16b81fSJiri Olsa regs->regs = buf; 69352ea45aSJiri Olsa regs->mask = PERF_REGS_MASK; 70aa16b81fSJiri Olsa 71aa16b81fSJiri Olsa return sample_ustack(sample, thread, buf); 72aa16b81fSJiri Olsa } 73