ae7b91b680
This change enables debuggerd to provide backtraces with function names in tombstone files and log messages. It does this by reading the image file that the address is found in, and parsing the dynamic symbol table to try to extract the symbol corresponding to the given address. This works best when "-Wl,-export-dynamic" is added to the LDFLAGS of each library and executable, because this will cause all symbols to be added to the dynamic symbol table. If this flag is not present, it will still work, but it will only be able to identify functions which are part of the external API of the library/executable. Change-Id: I618baaff9ed9143b7d1a1f302224e9f21d2b0626
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* system/debuggerd/utility.h
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**
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** Copyright 2008, 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 __utility_h
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#define __utility_h
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#include <stddef.h>
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#include <stdbool.h>
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#include "symbol_table.h"
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#ifndef PT_ARM_EXIDX
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#define PT_ARM_EXIDX 0x70000001 /* .ARM.exidx segment */
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#endif
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#define STACK_CONTENT_DEPTH 32
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typedef struct mapinfo {
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struct mapinfo *next;
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unsigned start;
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unsigned end;
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unsigned exidx_start;
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unsigned exidx_end;
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struct symbol_table *symbols;
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char name[];
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} mapinfo;
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/* Get a word from pid using ptrace. The result is the return value. */
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extern int get_remote_word(int pid, void *src);
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/* Handy routine to read aggregated data from pid using ptrace. The read
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* values are written to the dest locations directly.
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*/
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extern void get_remote_struct(int pid, void *src, void *dst, size_t size);
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/* Find the containing map for the pc */
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const mapinfo *pc_to_mapinfo (mapinfo *mi, unsigned pc, unsigned *rel_pc);
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/* Map a pc address to the name of the containing ELF file */
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const char *map_to_name(mapinfo *mi, unsigned pc, const char* def);
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/* Log information onto the tombstone */
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extern void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...);
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#endif
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