backtrace-helper.c revision 501edd29b823ce1301d2effdd3a9e4b6e2b20b76 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "Corkscrew"
18//#define LOG_NDEBUG 0
19
20#include "backtrace-helper.h"
21
22#include <cutils/log.h>
23
24backtrace_frame_t* add_backtrace_entry(uintptr_t pc, backtrace_frame_t* backtrace,
25        size_t ignore_depth, size_t max_depth,
26        size_t* ignored_frames, size_t* returned_frames) {
27    if (*ignored_frames < ignore_depth) {
28        *ignored_frames += 1;
29        return NULL;
30    }
31    if (*returned_frames >= max_depth) {
32        return NULL;
33    }
34    backtrace_frame_t* frame = &backtrace[*returned_frames];
35    frame->absolute_pc = pc;
36    frame->stack_top = 0;
37    frame->stack_size = 0;
38    *returned_frames += 1;
39    return frame;
40}
41