kopia lustrzana https://github.com/espressif/esp-idf
123 wiersze
4.1 KiB
C
123 wiersze
4.1 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "sdkconfig.h"
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#include "esp_types.h"
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#include "esp_attr.h"
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#include "esp_err.h"
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#include "esp_debug_helpers.h"
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#include "soc/soc_memory_layout.h"
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#include "soc/cpu.h"
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#include "esp_private/panic_internal.h"
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#include "esp_private/stack_mirror.h"
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#include "xtensa/xtensa_context.h"
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#include "sdkconfig.h"
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#include "esp_rom_sys.h"
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bool IRAM_ATTR esp_backtrace_get_next_frame(esp_backtrace_frame_t *frame)
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{
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//Use frame(i-1)'s BS area located below frame(i)'s sp to get frame(i-1)'s sp and frame(i-2)'s pc
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void *base_save = (void *)frame->sp; //Base save area consists of 4 words under SP
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frame->pc = frame->next_pc;
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frame->next_pc = *((uint32_t *)(base_save - 16)); //If next_pc = 0, indicates frame(i-1) is the last frame on the stack
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frame->sp = *((uint32_t *)(base_save - 12));
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//Return true if both sp and pc of frame(i-1) are sane, false otherwise
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return (esp_stack_ptr_is_sane(frame->sp) && esp_ptr_executable((void*)esp_cpu_process_stack_pc(frame->pc)));
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}
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static void IRAM_ATTR print_entry(uint32_t pc, uint32_t sp, bool panic)
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{
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if (panic) {
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panic_print_str(" 0x");
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panic_print_hex(pc);
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panic_print_str(":0x");
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panic_print_hex(sp);
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} else {
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esp_rom_printf(" 0x%08X:0x%08X", pc, sp);
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}
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}
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static void IRAM_ATTR print_str(const char* str, bool panic)
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{
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if (panic) {
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panic_print_str(str);
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} else {
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esp_rom_printf(str);
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}
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}
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esp_err_t IRAM_ATTR esp_backtrace_print_from_frame(int depth, const esp_backtrace_frame_t* frame, bool panic)
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{
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//Check arguments
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if (depth <= 0) {
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return ESP_ERR_INVALID_ARG;
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}
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//Initialize stk_frame with first frame of stack
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esp_backtrace_frame_t stk_frame = { 0 };
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memcpy(&stk_frame, frame, sizeof(esp_backtrace_frame_t));
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print_str("\r\n\r\nBacktrace:", panic);
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print_entry(esp_cpu_process_stack_pc(stk_frame.pc), stk_frame.sp, panic);
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//Check if first frame is valid
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bool corrupted = !(esp_stack_ptr_is_sane(stk_frame.sp) &&
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(esp_ptr_executable((void *)esp_cpu_process_stack_pc(stk_frame.pc)) ||
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/* Ignore the first corrupted PC in case of InstrFetchProhibited */
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(stk_frame.exc_frame && ((XtExcFrame *)stk_frame.exc_frame)->exccause == EXCCAUSE_INSTR_PROHIBITED)));
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uint32_t i = (depth <= 0) ? INT32_MAX : depth;
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while (i-- > 0 && stk_frame.next_pc != 0 && !corrupted) {
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if (!esp_backtrace_get_next_frame(&stk_frame)) { //Get previous stack frame
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corrupted = true;
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}
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print_entry(esp_cpu_process_stack_pc(stk_frame.pc), stk_frame.sp, panic);
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}
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//Print backtrace termination marker
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esp_err_t ret = ESP_OK;
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if (corrupted) {
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print_str(" |<-CORRUPTED", panic);
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#ifndef CONFIG_COMPILER_STACK_MIRROR
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print_str("\r\nTurn on Stack Mirroring to avoid corruption", panic);
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#endif
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ret = ESP_FAIL;
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} else if (stk_frame.next_pc != 0) { //Backtrace continues
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print_str(" |<-CONTINUES", panic);
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}
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print_str("\r\n\r\n", panic);
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return ret;
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}
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esp_err_t IRAM_ATTR esp_backtrace_print(int depth)
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{
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//Initialize stk_frame with first frame of stack
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esp_backtrace_frame_t start = { 0 };
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esp_backtrace_get_start(&(start.pc), &(start.sp), &(start.next_pc));
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esp_err_t err = esp_backtrace_print_from_frame(depth, &start, false);
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#if CONFIG_COMPILER_STACK_MIRROR
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if (err != ESP_OK) {
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stack_mirror_print_backtrace(false);
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}
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#endif
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return err;
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}
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