Breakpad工具下载，make
-
下载breakpad 源码，下载ssl包到 breakpad源码的third_party中去。需要翻墙
git clone https://chromium.googlesource.com/linux-syscall-support -
到源码下面编译，然后生成工具 dump_sys, minidump_stackwalk.（在src/processor下面）
./configure && make
make install
项目引用Breakpad工程
-
搭建module，导入breakpad源码，配置CMakeLists.txt
cmake_minimum_required(VERSION 3.4.1) set(BREAKPAD_ROOT ${CMAKE_CURRENT_SOURCE_DIR}) include_directories(${BREAKPAD_ROOT}/src ${BREAKPAD_ROOT}/src/common/android/include) file(GLOB BREAKPAD_SOURCES_COMMON ${BREAKPAD_ROOT}/src/client/linux/crash_generation/crash_generation_client.cc ${BREAKPAD_ROOT}/src/client/linux/dump_writer_common/thread_info.cc ${BREAKPAD_ROOT}/src/client/linux/dump_writer_common/ucontext_reader.cc ${BREAKPAD_ROOT}/src/client/linux/handler/exception_handler.cc ${BREAKPAD_ROOT}/src/client/linux/handler/minidump_descriptor.cc ${BREAKPAD_ROOT}/src/client/linux/log/log.cc ${BREAKPAD_ROOT}/src/client/linux/microdump_writer/microdump_writer.cc ${BREAKPAD_ROOT}/src/client/linux/minidump_writer/linux_dumper.cc ${BREAKPAD_ROOT}/src/client/linux/minidump_writer/linux_ptrace_dumper.cc ${BREAKPAD_ROOT}/src/client/linux/minidump_writer/minidump_writer.cc ${BREAKPAD_ROOT}/src/client/minidump_file_writer.cc ${BREAKPAD_ROOT}/src/common/convert_UTF.c ${BREAKPAD_ROOT}/src/common/md5.cc ${BREAKPAD_ROOT}/src/common/string_conversion.cc ${BREAKPAD_ROOT}/src/common/linux/elfutils.cc ${BREAKPAD_ROOT}/src/common/linux/file_id.cc ${BREAKPAD_ROOT}/src/common/linux/guid_creator.cc ${BREAKPAD_ROOT}/src/common/linux/linux_libc_support.cc ${BREAKPAD_ROOT}/src/common/linux/memory_mapped_file.cc ${BREAKPAD_ROOT}/src/common/linux/safe_readlink.cc ) file(GLOB BREAKPAD_ASM_SOURCE ${BREAKPAD_ROOT}/src/common/android/breakpad_getcontext.S ) set_source_files_properties(${BREAKPAD_ASM_SOURCE} PROPERTIES LANGUAGE C) add_library(breakpad STATIC ${BREAKPAD_SOURCES_COMMON} ${BREAKPAD_ASM_SOURCE}) target_link_libraries(breakpad log) -
初始化 Breakpad库
public class BreakpadInit { static { System.loadLibrary("breakpad-core"); } public static void initBreakpad(String path){ initBreakpadNative(path); } private static native void initBreakpadNative(String path); }
native：
bool DumpCallback(const google_breakpad::MinidumpDescriptor &descriptor,
void *context,
bool succeeded) {
ALOGD("===============crrrrash================");
ALOGD("Dump path: %s\n", descriptor.path());
return succeeded;
}
extern "C"
JNIEXPORT void JNICALL
Java_com_sample_breakpad_BreakpadInit_initBreakpadNative(JNIEnv *env, jclass type, jstring path_) {
const char *path = env->GetStringUTFChars(path_, 0);
google_breakpad::MinidumpDescriptor descriptor(path);
static google_breakpad::ExceptionHandler eh(descriptor, NULL, DumpCallback, NULL, true, -1);
env->ReleaseStringUTFChars(path_, path);
}
JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved) {
JNIEnv *env;
if (vm->GetEnv((void **) &env, JNI_VERSION_1_6) != JNI_OK) {
return JNI_ERR;
}
return JNI_VERSION_1_6;
}
-
项目工程中，把奔溃写入到sdcard里：
/** * 一般来说，crash捕获初始化都会放到Application中，这里主要是为了大家有机会可以把崩溃文件输 *出到sdcard中做进一步的分析 */ private void initBreakPad() { if (externalReportPath == null) { externalReportPath = new File(getFilesDir(), "crashDump"); if (!externalReportPath.exists()) { externalReportPath.mkdirs(); } } BreakpadInit.initBreakpad(externalReportPath.getAbsolutePath()); } @Override public void onRequestPermissionsResult( int requestCode, String[] permissions, int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); initExternalReportPath(); } private void initExternalReportPath() { externalReportPath = new File(Environment.getExternalStorageDirectory(), "crashDump"); if (!externalReportPath.exists()) { externalReportPath.mkdirs(); } }
分析
1.将sdcard中保存下来的crashDump的文件保存到本地：
$:> adb pull /sdcard/crashDump /Users/***/Desktop
- 首先把dump文件转化成text文件，采用的工具是Breakpad中的minidump工具。
./tools/mac/minidump_stackwalk crashDump/***.dmp >crashLog.txt
-
打开text文件看到详细的crash日志，如下
Operating system: Android 0.0.0 Linux 3.4.0-g7717f76 #1 SMP PREEMPT Wed Nov 4 21:42:24 UTC 2015 armv7l CPU: arm ARMv7 Qualcomm Krait features: swp,half,thumb,fastmult,vfpv2,edsp,neon,vfpv3,tls,vfpv4,idiva,idivt 4 CPUs GPU: UNKNOWN Crash reason: SIGSEGV /SEGV_MAPERR Crash address: 0x0 Process uptime: not available Thread 0 (crashed)//crash 发生时候的线程 0 libcrash-lib.so + 0x76e//发生 crash 的位置和寄存器信息 r0 = 0x00000000 r1 = 0x00000001 r2 = 0xbea9b1fc r3 = 0xb4d96a80 r4 = 0x6f94d378 r5 = 0x12c0ec00 r6 = 0x12dca6a0 r7 = 0xbea9b1e8 r8 = 0x12d63680 r9 = 0xb4db6500 r10 = 0x12d0bf20 r12 = 0xb3b1afd8 fp = 0x00000000 sp = 0xbea9b1d4 lr = 0xb3b1778b pc = 0xb3b1776e Found by: given as instruction pointer in context 1 dalvik-main space (deleted) + 0x1cf0de sp = 0xbea9b1ec pc = 0x12dcf0e0 Found by: stack scanning 2 base.odex + 0x441137 sp = 0xbea9b1f0 pc = 0xa2159139 Found by: stack scanning 3 dalvik-LinearAlloc (deleted) + 0x8bae sp = 0xbea9b1f4 pc = 0xb0732bb0 Found by: stack scanning 4 dalvik-main space (deleted) + 0x5397e sp = 0xbea9b200 pc = 0x12c53980 Found by: stack scanning 5 dalvik-main space (deleted) + 0xebfe sp = 0xbea9b248 pc = 0x12c0ec00 Found by: stack scanning 6 dalvik-main space (deleted) + 0x1ca69e sp = 0xbea9b24c pc = 0x12dca6a0 Found by: stack scanning 7 dalvik-main space (deleted) + 0x1cf0de sp = 0xbea9b250 pc = 0x12dcf0e0 Found by: stack scanning 8 dalvik-main space (deleted) + 0x16367e sp = 0xbea9b254 pc = 0x12d63680 Found by: stack scanning 9 dalvik-main space (deleted) + 0x10bf1e sp = 0xbea9b258 pc = 0x12d0bf20 Found by: stack scanning 10 base.odex + 0x440cb5 sp = 0xbea9b260 pc = 0xa2158cb7 Found by: stack scanning -
符号解析，可以使用 ndk 中提供的
addr2line来根据地址进行一个符号反解的过程,该工具在$NDK_HOME/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-addr2line
注意：此处要注意一下平台，如果是 arm64位的 so，解析是需要使用 aarch64-linux-android-4.9下的工具链
xiuchengdeMBP:crashDump xiuchengyin$ /Users/xiuchengyin/Library/Android/sdk/ndk-bundle/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin/aarch64-linux-android-addr2line -f -C -e libcrash-lib.so 0x76e
Crash()
/Users/xiuchengyin/Documents/AndroidJK/Chapter01/sample/src/main/cpp/crash.cpp:10
xiuchengdeMBP:crashDump xiuchengyin$
这样就可以看到 具体奔溃的代码行数了。
我只是做个笔记，文章参考：time.geekbang.org/column/arti…
