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