122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
/*
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* Copyright (C) 2018 Stefan Schake <stschake@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <backtrace/Backtrace.h>
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#include "util/u_debug.h"
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#include "u_debug_stack.h"
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#include "util/hash_table.h"
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#include "os/os_thread.h"
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static hash_table *symbol_table;
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static mtx_t table_mutex = _MTX_INITIALIZER_NP;
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static const char *
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intern_symbol(const char *symbol)
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{
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if (!symbol_table)
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symbol_table = _mesa_hash_table_create(NULL, NULL, _mesa_key_string_equal);
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uint32_t hash = _mesa_hash_string(symbol);
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hash_entry *entry =
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_mesa_hash_table_search_pre_hashed(symbol_table, hash, symbol);
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if (!entry)
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entry = _mesa_hash_table_insert_pre_hashed(symbol_table, hash, symbol, strdup(symbol));
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return (const char *) entry->data;
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}
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void
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debug_backtrace_capture(debug_stack_frame *backtrace,
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unsigned start_frame,
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unsigned nr_frames)
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{
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Backtrace *bt;
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if (!nr_frames)
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return;
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bt = Backtrace::Create(BACKTRACE_CURRENT_PROCESS,
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BACKTRACE_CURRENT_THREAD);
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if (bt == NULL) {
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for (unsigned i = 0; i < nr_frames; i++)
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backtrace[i].procname = NULL;
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return;
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}
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/* Add one to exclude this call. Unwind already ignores itself. */
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bt->Unwind(start_frame + 1);
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mtx_lock(&table_mutex);
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for (unsigned i = 0; i < nr_frames; i++) {
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const backtrace_frame_data_t* frame = bt->GetFrame(i);
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if (frame) {
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backtrace[i].procname = intern_symbol(frame->func_name.c_str());
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backtrace[i].start_ip = frame->pc;
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backtrace[i].off = frame->func_offset;
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backtrace[i].map = intern_symbol(frame->map.Name().c_str());
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backtrace[i].map_off = frame->rel_pc;
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} else {
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backtrace[i].procname = NULL;
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}
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}
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mtx_unlock(&table_mutex);
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delete bt;
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}
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void
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debug_backtrace_dump(const debug_stack_frame *backtrace,
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unsigned nr_frames)
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{
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for (unsigned i = 0; i < nr_frames; i++) {
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if (backtrace[i].procname)
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debug_printf(
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"%s(+0x%x)\t%012" PRIx64 ": %s+0x%x\n",
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backtrace[i].map,
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backtrace[i].map_off,
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backtrace[i].start_ip,
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backtrace[i].procname,
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backtrace[i].off);
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}
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}
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void
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debug_backtrace_print(FILE *f,
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const debug_stack_frame *backtrace,
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unsigned nr_frames)
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{
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for (unsigned i = 0; i < nr_frames; i++) {
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if (backtrace[i].procname)
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fprintf(f,
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"%s(+0x%x)\t%012" PRIx64 ": %s+0x%x\n",
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backtrace[i].map,
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backtrace[i].map_off,
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backtrace[i].start_ip,
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backtrace[i].procname,
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backtrace[i].off);
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}
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}
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