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