5d991bc351
1. Read .ARM.exidx and .ARM.extab, provides these data to libunwind through AccessMem. 2. In FindProcInfo, search .ARM.exidx for the idx entry of function containing ip. 3. Add structures to store .ARM.exidx info in DebugFrameInfo, and clean up the structure. 4. Add tests to test each unwind information (.eh_frame, .debug_frame, .gnu_debugdata, .ARM.exidx) separately. Bug: http://b/30974693 Test: run backtrace_test. Test: run simpleperf runtest.py. Change-Id: I9377a54379158bd35860efcf0e011423be7350d4
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <libunwind.h>
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#include <stdio.h>
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int test_level_four(int one, int two, int three, int four,
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void (*callback_func)(void*), void* data) {
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if (callback_func != NULL) {
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callback_func(data);
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} else {
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while (1) {
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}
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}
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return one + two + three + four;
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}
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int test_level_three(int one, int two, int three, int four,
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void (*callback_func)(void*), void* data) {
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return test_level_four(one+3, two+6, three+9, four+12, callback_func, data) + 3;
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}
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int test_level_two(int one, int two, int three, int four,
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void (*callback_func)(void*), void* data) {
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return test_level_three(one+2, two+4, three+6, four+8, callback_func, data) + 2;
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}
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int test_level_one(int one, int two, int three, int four,
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void (*callback_func)(void*), void* data) {
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return test_level_two(one+1, two+2, three+3, four+4, callback_func, data) + 1;
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}
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int test_recursive_call(int level, void (*callback_func)(void*), void* data) {
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if (level > 0) {
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return test_recursive_call(level - 1, callback_func, data) + level;
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} else if (callback_func != NULL) {
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callback_func(data);
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} else {
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while (1) {
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}
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}
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return 0;
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}
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typedef struct {
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unw_context_t* unw_context;
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volatile int* exit_flag;
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} GetContextArg;
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static void GetContextAndExit(void* data) {
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GetContextArg* arg = (GetContextArg*)data;
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unw_getcontext(arg->unw_context);
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// Don't touch the stack anymore.
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while (*arg->exit_flag == 0) {
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}
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}
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void test_get_context_and_wait(unw_context_t* unw_context, volatile int* exit_flag) {
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GetContextArg arg;
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arg.unw_context = unw_context;
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arg.exit_flag = exit_flag;
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test_level_one(1, 2, 3, 4, GetContextAndExit, &arg);
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}
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