474afff229
Missed this typo that enh pointed out. Bug: 8410085 Change-Id: Ic636ae218fc153bc5e3b1a0fdc2f7161980e5eec
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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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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*
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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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*/
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#ifndef _BACKTRACE_H
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#define _BACKTRACE_H
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#include <sys/types.h>
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#include <stdbool.h>
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#include <inttypes.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAX_BACKTRACE_FRAMES 64
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typedef struct backtrace_map_info {
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struct backtrace_map_info* next;
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uintptr_t start;
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uintptr_t end;
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bool is_readable;
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bool is_writable;
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bool is_executable;
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char name[];
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} backtrace_map_info_t;
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typedef struct {
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uintptr_t pc; /* The absolute pc. */
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uintptr_t sp; /* The top of the stack. */
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size_t stack_size; /* The size of the stack, zero indicate an unknown stack size. */
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const char* map_name; /* The name of the map to which this pc belongs, NULL indicates the pc doesn't belong to a known map. */
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uintptr_t map_offset; /* pc relative to the start of the map, only valid if map_name is not NULL. */
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char* proc_name; /* The function name associated with this pc, NULL if not found. */
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uintptr_t proc_offset; /* pc relative to the start of the procedure, only valid if proc_name is not NULL. */
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} backtrace_frame_data_t;
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typedef struct {
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backtrace_frame_data_t frames[MAX_BACKTRACE_FRAMES];
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size_t num_frames;
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pid_t tid;
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backtrace_map_info_t* map_info_list;
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void* private_data;
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} backtrace_t;
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/* Gather the backtrace data for tid and fill in the backtrace structure.
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* If tid < 0, then gather the backtrace for the current thread.
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*/
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bool backtrace_get_data(backtrace_t* backtrace, pid_t tid);
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/* Free any memory associated with the backtrace structure. */
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void backtrace_free_data(backtrace_t* backtrace);
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/* Read data at a specific address for a process. */
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bool backtrace_read_word(
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const backtrace_t* backtrace, uintptr_t ptr, uint32_t* value);
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/* Get information about the map associated with a pc. If NULL is
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* returned, then map_start is not set.
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*/
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const char* backtrace_get_map_info(
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const backtrace_t* backtrace, uintptr_t pc, uintptr_t* map_start);
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/* Get the procedure name and offest given the pc. If NULL is returned,
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* then proc_offset is not set. The returned string is allocated using
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* malloc and must be freed by the caller.
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*/
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char* backtrace_get_proc_name(
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const backtrace_t* backtrace, uintptr_t pc, uintptr_t* proc_offset);
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/* Loads memory map from /proc/<tid>/maps. If tid < 0, then load the memory
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* map for the current process.
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*/
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backtrace_map_info_t* backtrace_create_map_info_list(pid_t tid);
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/* Frees memory associated with the map list. */
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void backtrace_destroy_map_info_list(backtrace_map_info_t* map_info_list);
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/* Finds the memory map that contains the specified pc. */
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const backtrace_map_info_t* backtrace_find_map_info(
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const backtrace_map_info_t* map_info_list, uintptr_t pc);
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/* Create a formatted line of backtrace information for a single frame. */
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void backtrace_format_frame_data(
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const backtrace_frame_data_t* frame, size_t frame_num, char *buf, size_t buf_size);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _BACKTRACE_H */
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