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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 *backtrace_table;
static mtx_t table_mutex = _MTX_INITIALIZER_NP;
void
debug_backtrace_capture(debug_stack_frame *mesa_backtrace,
unsigned start_frame,
unsigned nr_frames)
{
hash_entry *backtrace_entry;
Backtrace *backtrace;
pid_t tid = gettid();
if (!nr_frames)
return;
/* We keep an Android Backtrace handler around for each thread */
mtx_lock(&table_mutex);
if (!backtrace_table)
backtrace_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
_mesa_key_pointer_equal);
backtrace_entry = _mesa_hash_table_search(backtrace_table, (void*) (uintptr_t)tid);
if (!backtrace_entry) {
backtrace = Backtrace::Create(getpid(), tid);
_mesa_hash_table_insert(backtrace_table, (void*) (uintptr_t)tid, backtrace);
} else {
backtrace = (Backtrace *) backtrace_entry->data;
}
mtx_unlock(&table_mutex);
/* Add one to exclude this call. Unwind already ignores itself. */
backtrace->Unwind(start_frame + 1);
/* Store the Backtrace handler in the first mesa frame for reference.
* Unwind will generally return less frames than nr_frames specified
* but we have no good way of storing the real count otherwise.
* The Backtrace handler only stores the results until the next Unwind,
* but that is how u_debug_stack is used anyway.
*/
mesa_backtrace->function = backtrace;
}
void
debug_backtrace_dump(const debug_stack_frame *mesa_backtrace,
unsigned nr_frames)
{
Backtrace *backtrace = (Backtrace *) mesa_backtrace->function;
size_t i;
if (!nr_frames)
return;
if (nr_frames > backtrace->NumFrames())
nr_frames = backtrace->NumFrames();
for (i = 0; i < nr_frames; i++) {
/* There is no prescribed format and this isn't interpreted further,
* so we simply use the default Android format.
*/
const std::string& frame_line = backtrace->FormatFrameData(i);
debug_printf("%s\n", frame_line.c_str());
}
}
void
debug_backtrace_print(FILE *f,
const debug_stack_frame *mesa_backtrace,
unsigned nr_frames)
{
Backtrace *backtrace = (Backtrace *) mesa_backtrace->function;
size_t i;
if (!nr_frames)
return;
if (nr_frames > backtrace->NumFrames())
nr_frames = backtrace->NumFrames();
for (i = 0; i < nr_frames; i++) {
const std::string& frame_line = backtrace->FormatFrameData(i);
fprintf(f, "%s\n", frame_line.c_str());
}
}
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