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Breakpad is a library that records crashes in compact "minidump" files. It produce C and C++ stack traces from minidumps. Breakpad can also write minidumps on request for programs that have not crashed.
How to Integrate Google Breakpad library?
Link against libbreakpad_client library.
#include "client/linux/handler/exception_handler.h“
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#include "client/linux/handler/exception_handler.h“ // Include Header file for exception handler static bool dumpCallback(const google_breakpad::MinidumpDescriptor& descriptor, void* context, bool succeeded) { printf("Dump path: %s\n", descriptor.path()); return succeeded; } int main(int argc, char* argv[]) { google_breakpad::MinidumpDescriptor descriptor("/tmp"); google_breakpad::ExceptionHandler eh(descriptor, // Minidump will be saved in /tmp NULL, dumpCallback, //Callback NULL, true, |
Google Breakpad Utilities
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dump_syms ./gpsample_app > gpsample_app.sym, will generate symbol file. |
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It takes a minidump and its corresponding text-format symbols and produce a symbolized stacktrace. minidump_stackwalk minidump.dmp gpsample_app.sym |
Core dump files generated after an uncaught signal in a process (as a SIGSEGV or SIGQUIT), are generated in the base directory where the program was executed, and the core dumps starts with the name as “core” or “core.PID”.
By default size of the core will be zero, To generate the core, we need to set the size of the core to unlimited.
By default, core will be generated in the current directory with the file name "core". We can change the core generating directory from current directory to another by editing the kernel configuration file core pattern(/proc/sys/kernel/core_pattern) in the kernel.
echo "newpattern" > /proc/sys/kernel/core_pattern
Core pattern is helpful in the case if there are couple of core dumps files in one directory and we don't know which program caused it.