Breakpad usage and DMP analysis

breakpad compile

1,breakpad Source download path
https://chromium.googlesource.com/breakpad/breakpad
The latest version requires g++ Support c++11, If g++ I won't support it c++11, You can use a lower version breakpad, Choose... Here 42
2,./configure && make
3, There are few problems encountered during compilation lss file , Download here https://chromium.googlesource.com/linux-syscall-support/
4, If gcc Version is too low , Will be submitted to the -Werror Wait for several unrecognized error messages , At this time, you can Makefile in -Werror Relevant settings are commented out

breakpad Use

1, Include header file
“client/linux/handler/minidump_descriptor.h”
“client/linux/handler/exception_handler.h”
2, google_breakpad::MinidumpDescriptor descriptor("./tmp"); // Appoint minidump File write Directory
google_breakpad::ExceptionHandler eh(descriptor, NULL, breakpad_callback, NULL, true ,-1);

	//  finish writing sth. minidump Callback function after 
	static bool breakpad_callback(const google_breakpad::MinidumpDescriptor& descriptor,
          void* context, bool succeeded) 
    {
    
  			printf("Dump path: %s\n", descriptor.path());
  			return succeeded;
  	}
  	int main()
  	{
    
  		google_breakpad::MinidumpDescriptor descriptor("./tmp"); // Appoint minidump File write Directory 
		google_breakpad::ExceptionHandler eh(descriptor, NULL, breakpad_callback, NULL, true ,-1);
		char *p = NULL;
		*p=1;
		return 0;
  	}

}

dmp analysis

dmp File analysis requires two executable programs , The first is dump_syms, The second is minidump_stackwalk
1,dump_syms A symbol table used to generate executable programs , Such as
./dump_syms main >main.sym
./dump_syms libsecmodel.so > libsecmodel.so.sym
2, according to main.sym obtain version number
perform head main.sym -n 1
obtain MODULE Linux x86_64 0B3BFC770A76BCA18E2ECC7A19DF61DF0 main
Create folder symobols/main/0B3BFC770A76BCA18E2ECC7A19DF61DF0
3, take main.sym Copied to the symobols/main/0B3BFC770A76BCA18E2ECC7A19DF61DF0 Next
4, Suppose the program crashes and generates dmp File for 7f0a5ae5-4ea2-150e-55e9b70e-05c9ae40.dmp
5, Generate readable stack information
minidump_stackwalk 7f0a5ae5-4ea2-150e-55e9b70e-05c9ae40.dmp ./symbols > main.result
Stack information is stored in main.result In file