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-rw-r--r--libbacktrace/backtrace_test.cpp695
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diff --git a/libbacktrace/backtrace_test.cpp b/libbacktrace/backtrace_test.cpp
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+++ b/libbacktrace/backtrace_test.cpp
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+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ptrace.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
+#include <UniquePtr.h>
+
+#include <cutils/atomic.h>
+#include <gtest/gtest.h>
+
+#include <vector>
+
+#include "thread_utils.h"
+
+// Number of microseconds per milliseconds.
+#define US_PER_MSEC 1000
+
+// Number of nanoseconds in a second.
+#define NS_PER_SEC 1000000000ULL
+
+// Number of simultaneous dumping operations to perform.
+#define NUM_THREADS 20
+
+// Number of simultaneous threads running in our forked process.
+#define NUM_PTRACE_THREADS 5
+
+struct thread_t {
+ pid_t tid;
+ int32_t state;
+ pthread_t threadId;
+};
+
+struct dump_thread_t {
+ thread_t thread;
+ Backtrace* backtrace;
+ int32_t* now;
+ int32_t done;
+};
+
+extern "C" {
+// Prototypes for functions in the test library.
+int test_level_one(int, int, int, int, void (*)(void*), void*);
+
+int test_recursive_call(int, void (*)(void*), void*);
+}
+
+uint64_t NanoTime() {
+ struct timespec t = { 0, 0 };
+ clock_gettime(CLOCK_MONOTONIC, &t);
+ return static_cast<uint64_t>(t.tv_sec * NS_PER_SEC + t.tv_nsec);
+}
+
+void DumpFrames(Backtrace* backtrace) {
+ if (backtrace->NumFrames() == 0) {
+ printf(" No frames to dump\n");
+ return;
+ }
+
+ for (size_t i = 0; i < backtrace->NumFrames(); i++) {
+ printf(" %s\n", backtrace->FormatFrameData(i).c_str());
+ }
+}
+
+void WaitForStop(pid_t pid) {
+ uint64_t start = NanoTime();
+
+ siginfo_t si;
+ while (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) < 0 && (errno == EINTR || errno == ESRCH)) {
+ if ((NanoTime() - start) > NS_PER_SEC) {
+ printf("The process did not get to a stopping point in 1 second.\n");
+ break;
+ }
+ usleep(US_PER_MSEC);
+ }
+}
+
+bool ReadyLevelBacktrace(Backtrace* backtrace) {
+ // See if test_level_four is in the backtrace.
+ bool found = false;
+ for (Backtrace::const_iterator it = backtrace->begin(); it != backtrace->end(); ++it) {
+ if (it->func_name == "test_level_four") {
+ found = true;
+ break;
+ }
+ }
+
+ return found;
+}
+
+void VerifyLevelDump(Backtrace* backtrace) {
+ ASSERT_GT(backtrace->NumFrames(), static_cast<size_t>(0));
+ ASSERT_LT(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES));
+
+ // Look through the frames starting at the highest to find the
+ // frame we want.
+ size_t frame_num = 0;
+ for (size_t i = backtrace->NumFrames()-1; i > 2; i--) {
+ if (backtrace->GetFrame(i)->func_name == "test_level_one") {
+ frame_num = i;
+ break;
+ }
+ }
+ ASSERT_LT(static_cast<size_t>(0), frame_num);
+ ASSERT_LE(static_cast<size_t>(3), frame_num);
+
+ ASSERT_EQ(backtrace->GetFrame(frame_num)->func_name, "test_level_one");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-1)->func_name, "test_level_two");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-2)->func_name, "test_level_three");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-3)->func_name, "test_level_four");
+}
+
+void VerifyLevelBacktrace(void*) {
+ UniquePtr<Backtrace> backtrace(
+ Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyLevelDump(backtrace.get());
+}
+
+bool ReadyMaxBacktrace(Backtrace* backtrace) {
+ return (backtrace->NumFrames() == MAX_BACKTRACE_FRAMES);
+}
+
+void VerifyMaxDump(Backtrace* backtrace) {
+ ASSERT_EQ(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES));
+ // Verify that the last frame is our recursive call.
+ ASSERT_EQ(backtrace->GetFrame(MAX_BACKTRACE_FRAMES-1)->func_name,
+ "test_recursive_call");
+}
+
+void VerifyMaxBacktrace(void*) {
+ UniquePtr<Backtrace> backtrace(
+ Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyMaxDump(backtrace.get());
+}
+
+void ThreadSetState(void* data) {
+ thread_t* thread = reinterpret_cast<thread_t*>(data);
+ android_atomic_acquire_store(1, &thread->state);
+ volatile int i = 0;
+ while (thread->state) {
+ i++;
+ }
+}
+
+void VerifyThreadTest(pid_t tid, void (*VerifyFunc)(Backtrace*)) {
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), tid));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyFunc(backtrace.get());
+}
+
+bool WaitForNonZero(int32_t* value, uint64_t seconds) {
+ uint64_t start = NanoTime();
+ do {
+ if (android_atomic_acquire_load(value)) {
+ return true;
+ }
+ } while ((NanoTime() - start) < seconds * NS_PER_SEC);
+ return false;
+}
+
+TEST(libbacktrace, local_trace) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, VerifyLevelBacktrace, NULL), 0);
+}
+
+void VerifyIgnoreFrames(
+ Backtrace* bt_all, Backtrace* bt_ign1,
+ Backtrace* bt_ign2, const char* cur_proc) {
+ EXPECT_EQ(bt_all->NumFrames(), bt_ign1->NumFrames() + 1);
+ EXPECT_EQ(bt_all->NumFrames(), bt_ign2->NumFrames() + 2);
+
+ // Check all of the frames are the same > the current frame.
+ bool check = (cur_proc == NULL);
+ for (size_t i = 0; i < bt_ign2->NumFrames(); i++) {
+ if (check) {
+ EXPECT_EQ(bt_ign2->GetFrame(i)->pc, bt_ign1->GetFrame(i+1)->pc);
+ EXPECT_EQ(bt_ign2->GetFrame(i)->sp, bt_ign1->GetFrame(i+1)->sp);
+ EXPECT_EQ(bt_ign2->GetFrame(i)->stack_size, bt_ign1->GetFrame(i+1)->stack_size);
+
+ EXPECT_EQ(bt_ign2->GetFrame(i)->pc, bt_all->GetFrame(i+2)->pc);
+ EXPECT_EQ(bt_ign2->GetFrame(i)->sp, bt_all->GetFrame(i+2)->sp);
+ EXPECT_EQ(bt_ign2->GetFrame(i)->stack_size, bt_all->GetFrame(i+2)->stack_size);
+ }
+ if (!check && bt_ign2->GetFrame(i)->func_name == cur_proc) {
+ check = true;
+ }
+ }
+}
+
+void VerifyLevelIgnoreFrames(void*) {
+ UniquePtr<Backtrace> all(
+ Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(all.get() != NULL);
+ ASSERT_TRUE(all->Unwind(0));
+
+ UniquePtr<Backtrace> ign1(
+ Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(ign1.get() != NULL);
+ ASSERT_TRUE(ign1->Unwind(1));
+
+ UniquePtr<Backtrace> ign2(
+ Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(ign2.get() != NULL);
+ ASSERT_TRUE(ign2->Unwind(2));
+
+ VerifyIgnoreFrames(all.get(), ign1.get(), ign2.get(), "VerifyLevelIgnoreFrames");
+}
+
+TEST(libbacktrace, local_trace_ignore_frames) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, VerifyLevelIgnoreFrames, NULL), 0);
+}
+
+TEST(libbacktrace, local_max_trace) {
+ ASSERT_NE(test_recursive_call(MAX_BACKTRACE_FRAMES+10, VerifyMaxBacktrace, NULL), 0);
+}
+
+void VerifyProcTest(pid_t pid, pid_t tid, bool share_map,
+ bool (*ReadyFunc)(Backtrace*),
+ void (*VerifyFunc)(Backtrace*)) {
+ pid_t ptrace_tid;
+ if (tid < 0) {
+ ptrace_tid = pid;
+ } else {
+ ptrace_tid = tid;
+ }
+ uint64_t start = NanoTime();
+ bool verified = false;
+ do {
+ usleep(US_PER_MSEC);
+ if (ptrace(PTRACE_ATTACH, ptrace_tid, 0, 0) == 0) {
+ // Wait for the process to get to a stopping point.
+ WaitForStop(ptrace_tid);
+
+ UniquePtr<BacktraceMap> map;
+ if (share_map) {
+ map.reset(BacktraceMap::Create(pid));
+ }
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(pid, tid, map.get()));
+ ASSERT_TRUE(backtrace->Unwind(0));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ if (ReadyFunc(backtrace.get())) {
+ VerifyFunc(backtrace.get());
+ verified = true;
+ }
+
+ ASSERT_TRUE(ptrace(PTRACE_DETACH, ptrace_tid, 0, 0) == 0);
+ }
+ // If 5 seconds have passed, then we are done.
+ } while (!verified && (NanoTime() - start) <= 5 * NS_PER_SEC);
+ ASSERT_TRUE(verified);
+}
+
+TEST(libbacktrace, ptrace_trace) {
+ pid_t pid;
+ if ((pid = fork()) == 0) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, NULL, NULL), 0);
+ exit(1);
+ }
+ VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, false, ReadyLevelBacktrace, VerifyLevelDump);
+
+ kill(pid, SIGKILL);
+ int status;
+ ASSERT_EQ(waitpid(pid, &status, 0), pid);
+}
+
+TEST(libbacktrace, ptrace_trace_shared_map) {
+ pid_t pid;
+ if ((pid = fork()) == 0) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, NULL, NULL), 0);
+ exit(1);
+ }
+
+ VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, true, ReadyLevelBacktrace, VerifyLevelDump);
+
+ kill(pid, SIGKILL);
+ int status;
+ ASSERT_EQ(waitpid(pid, &status, 0), pid);
+}
+
+TEST(libbacktrace, ptrace_max_trace) {
+ pid_t pid;
+ if ((pid = fork()) == 0) {
+ ASSERT_NE(test_recursive_call(MAX_BACKTRACE_FRAMES+10, NULL, NULL), 0);
+ exit(1);
+ }
+ VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, false, ReadyMaxBacktrace, VerifyMaxDump);
+
+ kill(pid, SIGKILL);
+ int status;
+ ASSERT_EQ(waitpid(pid, &status, 0), pid);
+}
+
+void VerifyProcessIgnoreFrames(Backtrace* bt_all) {
+ UniquePtr<Backtrace> ign1(Backtrace::Create(bt_all->Pid(), BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(ign1.get() != NULL);
+ ASSERT_TRUE(ign1->Unwind(1));
+
+ UniquePtr<Backtrace> ign2(Backtrace::Create(bt_all->Pid(), BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(ign2.get() != NULL);
+ ASSERT_TRUE(ign2->Unwind(2));
+
+ VerifyIgnoreFrames(bt_all, ign1.get(), ign2.get(), NULL);
+}
+
+TEST(libbacktrace, ptrace_ignore_frames) {
+ pid_t pid;
+ if ((pid = fork()) == 0) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, NULL, NULL), 0);
+ exit(1);
+ }
+ VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, false, ReadyLevelBacktrace, VerifyProcessIgnoreFrames);
+
+ kill(pid, SIGKILL);
+ int status;
+ ASSERT_EQ(waitpid(pid, &status, 0), pid);
+}
+
+// Create a process with multiple threads and dump all of the threads.
+void* PtraceThreadLevelRun(void*) {
+ EXPECT_NE(test_level_one(1, 2, 3, 4, NULL, NULL), 0);
+ return NULL;
+}
+
+void GetThreads(pid_t pid, std::vector<pid_t>* threads) {
+ // Get the list of tasks.
+ char task_path[128];
+ snprintf(task_path, sizeof(task_path), "/proc/%d/task", pid);
+
+ DIR* tasks_dir = opendir(task_path);
+ ASSERT_TRUE(tasks_dir != NULL);
+ struct dirent* entry;
+ while ((entry = readdir(tasks_dir)) != NULL) {
+ char* end;
+ pid_t tid = strtoul(entry->d_name, &end, 10);
+ if (*end == '\0') {
+ threads->push_back(tid);
+ }
+ }
+ closedir(tasks_dir);
+}
+
+TEST(libbacktrace, ptrace_threads) {
+ pid_t pid;
+ if ((pid = fork()) == 0) {
+ for (size_t i = 0; i < NUM_PTRACE_THREADS; i++) {
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+ pthread_t thread;
+ ASSERT_TRUE(pthread_create(&thread, &attr, PtraceThreadLevelRun, NULL) == 0);
+ }
+ ASSERT_NE(test_level_one(1, 2, 3, 4, NULL, NULL), 0);
+ exit(1);
+ }
+
+ // Check to see that all of the threads are running before unwinding.
+ std::vector<pid_t> threads;
+ uint64_t start = NanoTime();
+ do {
+ usleep(US_PER_MSEC);
+ threads.clear();
+ GetThreads(pid, &threads);
+ } while ((threads.size() != NUM_PTRACE_THREADS + 1) &&
+ ((NanoTime() - start) <= 5 * NS_PER_SEC));
+ ASSERT_EQ(threads.size(), static_cast<size_t>(NUM_PTRACE_THREADS + 1));
+
+ ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
+ WaitForStop(pid);
+ for (std::vector<int>::const_iterator it = threads.begin(); it != threads.end(); ++it) {
+ // Skip the current forked process, we only care about the threads.
+ if (pid == *it) {
+ continue;
+ }
+ VerifyProcTest(pid, *it, false, ReadyLevelBacktrace, VerifyLevelDump);
+ }
+ ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
+
+ kill(pid, SIGKILL);
+ int status;
+ ASSERT_EQ(waitpid(pid, &status, 0), pid);
+}
+
+void VerifyLevelThread(void*) {
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), gettid()));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyLevelDump(backtrace.get());
+}
+
+TEST(libbacktrace, thread_current_level) {
+ ASSERT_NE(test_level_one(1, 2, 3, 4, VerifyLevelThread, NULL), 0);
+}
+
+void VerifyMaxThread(void*) {
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), gettid()));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyMaxDump(backtrace.get());
+}
+
+TEST(libbacktrace, thread_current_max) {
+ ASSERT_NE(test_recursive_call(MAX_BACKTRACE_FRAMES+10, VerifyMaxThread, NULL), 0);
+}
+
+void* ThreadLevelRun(void* data) {
+ thread_t* thread = reinterpret_cast<thread_t*>(data);
+
+ thread->tid = gettid();
+ EXPECT_NE(test_level_one(1, 2, 3, 4, ThreadSetState, data), 0);
+ return NULL;
+}
+
+TEST(libbacktrace, thread_level_trace) {
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+ thread_t thread_data = { 0, 0, 0 };
+ pthread_t thread;
+ ASSERT_TRUE(pthread_create(&thread, &attr, ThreadLevelRun, &thread_data) == 0);
+
+ // Wait up to 2 seconds for the tid to be set.
+ ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
+
+ // Save the current signal action and make sure it is restored afterwards.
+ struct sigaction cur_action;
+ ASSERT_TRUE(sigaction(SIGURG, NULL, &cur_action) == 0);
+
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), thread_data.tid));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyLevelDump(backtrace.get());
+
+ // Tell the thread to exit its infinite loop.
+ android_atomic_acquire_store(0, &thread_data.state);
+
+ // Verify that the old action was restored.
+ struct sigaction new_action;
+ ASSERT_TRUE(sigaction(SIGURG, NULL, &new_action) == 0);
+ EXPECT_EQ(cur_action.sa_sigaction, new_action.sa_sigaction);
+ EXPECT_EQ(cur_action.sa_flags, new_action.sa_flags);
+}
+
+TEST(libbacktrace, thread_ignore_frames) {
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+ thread_t thread_data = { 0, 0, 0 };
+ pthread_t thread;
+ ASSERT_TRUE(pthread_create(&thread, &attr, ThreadLevelRun, &thread_data) == 0);
+
+ // Wait up to 2 seconds for the tid to be set.
+ ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
+
+ UniquePtr<Backtrace> all(Backtrace::Create(getpid(), thread_data.tid));
+ ASSERT_TRUE(all.get() != NULL);
+ ASSERT_TRUE(all->Unwind(0));
+
+ UniquePtr<Backtrace> ign1(Backtrace::Create(getpid(), thread_data.tid));
+ ASSERT_TRUE(ign1.get() != NULL);
+ ASSERT_TRUE(ign1->Unwind(1));
+
+ UniquePtr<Backtrace> ign2(Backtrace::Create(getpid(), thread_data.tid));
+ ASSERT_TRUE(ign2.get() != NULL);
+ ASSERT_TRUE(ign2->Unwind(2));
+
+ VerifyIgnoreFrames(all.get(), ign1.get(), ign2.get(), NULL);
+
+ // Tell the thread to exit its infinite loop.
+ android_atomic_acquire_store(0, &thread_data.state);
+}
+
+void* ThreadMaxRun(void* data) {
+ thread_t* thread = reinterpret_cast<thread_t*>(data);
+
+ thread->tid = gettid();
+ EXPECT_NE(test_recursive_call(MAX_BACKTRACE_FRAMES+10, ThreadSetState, data), 0);
+ return NULL;
+}
+
+TEST(libbacktrace, thread_max_trace) {
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+ thread_t thread_data = { 0, 0, 0 };
+ pthread_t thread;
+ ASSERT_TRUE(pthread_create(&thread, &attr, ThreadMaxRun, &thread_data) == 0);
+
+ // Wait for the tid to be set.
+ ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
+
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), thread_data.tid));
+ ASSERT_TRUE(backtrace.get() != NULL);
+ ASSERT_TRUE(backtrace->Unwind(0));
+
+ VerifyMaxDump(backtrace.get());
+
+ // Tell the thread to exit its infinite loop.
+ android_atomic_acquire_store(0, &thread_data.state);
+}
+
+void* ThreadDump(void* data) {
+ dump_thread_t* dump = reinterpret_cast<dump_thread_t*>(data);
+ while (true) {
+ if (android_atomic_acquire_load(dump->now)) {
+ break;
+ }
+ }
+
+ // The status of the actual unwind will be checked elsewhere.
+ dump->backtrace = Backtrace::Create(getpid(), dump->thread.tid);
+ dump->backtrace->Unwind(0);
+
+ android_atomic_acquire_store(1, &dump->done);
+
+ return NULL;
+}
+
+TEST(libbacktrace, thread_multiple_dump) {
+ // Dump NUM_THREADS simultaneously.
+ std::vector<thread_t> runners(NUM_THREADS);
+ std::vector<dump_thread_t> dumpers(NUM_THREADS);
+
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ for (size_t i = 0; i < NUM_THREADS; i++) {
+ // Launch the runners, they will spin in hard loops doing nothing.
+ runners[i].tid = 0;
+ runners[i].state = 0;
+ ASSERT_TRUE(pthread_create(&runners[i].threadId, &attr, ThreadMaxRun, &runners[i]) == 0);
+ }
+
+ // Wait for tids to be set.
+ for (std::vector<thread_t>::iterator it = runners.begin(); it != runners.end(); ++it) {
+ ASSERT_TRUE(WaitForNonZero(&it->state, 10));
+ }
+
+ // Start all of the dumpers at once, they will spin until they are signalled
+ // to begin their dump run.
+ int32_t dump_now = 0;
+ for (size_t i = 0; i < NUM_THREADS; i++) {
+ dumpers[i].thread.tid = runners[i].tid;
+ dumpers[i].thread.state = 0;
+ dumpers[i].done = 0;
+ dumpers[i].now = &dump_now;
+
+ ASSERT_TRUE(pthread_create(&dumpers[i].thread.threadId, &attr, ThreadDump, &dumpers[i]) == 0);
+ }
+
+ // Start all of the dumpers going at once.
+ android_atomic_acquire_store(1, &dump_now);
+
+ for (size_t i = 0; i < NUM_THREADS; i++) {
+ ASSERT_TRUE(WaitForNonZero(&dumpers[i].done, 10));
+
+ // Tell the runner thread to exit its infinite loop.
+ android_atomic_acquire_store(0, &runners[i].state);
+
+ ASSERT_TRUE(dumpers[i].backtrace != NULL);
+ VerifyMaxDump(dumpers[i].backtrace);
+
+ delete dumpers[i].backtrace;
+ dumpers[i].backtrace = NULL;
+ }
+}
+
+// This test is for UnwindMaps that should share the same map cursor when
+// multiple maps are created for the current process at the same time.
+TEST(libbacktrace, simultaneous_maps) {
+ BacktraceMap* map1 = BacktraceMap::Create(getpid());
+ BacktraceMap* map2 = BacktraceMap::Create(getpid());
+ BacktraceMap* map3 = BacktraceMap::Create(getpid());
+
+ Backtrace* back1 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map1);
+ EXPECT_TRUE(back1->Unwind(0));
+ delete back1;
+ delete map1;
+
+ Backtrace* back2 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map2);
+ EXPECT_TRUE(back2->Unwind(0));
+ delete back2;
+ delete map2;
+
+ Backtrace* back3 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map3);
+ EXPECT_TRUE(back3->Unwind(0));
+ delete back3;
+ delete map3;
+}
+
+TEST(libbacktrace, format_test) {
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD));
+ ASSERT_TRUE(backtrace.get() != NULL);
+
+ backtrace_frame_data_t frame;
+ frame.num = 1;
+ frame.pc = 2;
+ frame.sp = 0;
+ frame.stack_size = 0;
+ frame.map = NULL;
+ frame.func_offset = 0;
+
+ backtrace_map_t map;
+ map.start = 0;
+ map.end = 0;
+
+ // Check no map set.
+ frame.num = 1;
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000000000002 <unknown>",
+#else
+ EXPECT_EQ("#01 pc 00000002 <unknown>",
+#endif
+ backtrace->FormatFrameData(&frame));
+
+ // Check map name empty, but exists.
+ frame.map = &map;
+ map.start = 1;
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000000000001 <unknown>",
+#else
+ EXPECT_EQ("#01 pc 00000001 <unknown>",
+#endif
+ backtrace->FormatFrameData(&frame));
+
+
+ // Check relative pc is set and map name is set.
+ frame.pc = 0x12345679;
+ frame.map = &map;
+ map.name = "MapFake";
+ map.start = 1;
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake",
+#else
+ EXPECT_EQ("#01 pc 12345678 MapFake",
+#endif
+ backtrace->FormatFrameData(&frame));
+
+ // Check func_name is set, but no func offset.
+ frame.func_name = "ProcFake";
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake (ProcFake)",
+#else
+ EXPECT_EQ("#01 pc 12345678 MapFake (ProcFake)",
+#endif
+ backtrace->FormatFrameData(&frame));
+
+ // Check func_name is set, and func offset is non-zero.
+ frame.func_offset = 645;
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake (ProcFake+645)",
+#else
+ EXPECT_EQ("#01 pc 12345678 MapFake (ProcFake+645)",
+#endif
+ backtrace->FormatFrameData(&frame));
+}
generated by cgit v1.1 at 2025-08-15 19:18:36 +0000