Raspberry Pi optimized backtrace()

Is there any Raspberry Pi optimized/specific backtrace() implementation? I'm using standard backtrace() code but looking forward for more detailed output from my_backtrace function.

void my_backtrace(){      void *stack[10];      int n = backtrace(stack, 10);      std::cout << "Last  frames==" << n << std::endl;      backtrace_symbols_fd(stack, n, STDOUT_FILENO); } 

1 Answers

Answers 1

//--There is list of options: //a) backtrace in combination with abi::__cxa_demangle //b) GDB //c) [libunwind][1], [http://www.nongnu.org/libunwind/docs.html]  //d) libbfd-dev  //e) [backward-cpp][1], [https://github.com/bombela/backward-cpp] //f) [libbacktrace][1], [https://github.com/ErwanLegrand/libbacktrace] //----------------------------------------------- #include <execinfo.h> #include <iostream> #include <sys/types.h> #include <unistd.h> #include <sstream> #include <sys/wait.h> //----------------------------------------------- //Based on GDB //----------------------------------------------- void print_trace_gdb() {     char pid_buf[30];     sprintf(pid_buf, "%d", getpid());     char name_buf[512];     name_buf[readlink("/proc/self/exe", name_buf, 511)]=0;      int child_pid = fork();     if (!child_pid) {                    dup2(2,1); // redirect output to stderr         fprintf(stdout,"stack trace for %s pid=%s\n",name_buf, pid_buf);         execlp("gdb", "gdb", "--batch", "-n", "-ex", "thread", "-ex", "bt", name_buf, pid_buf, NULL);         //if gdb failed to start         abort();     } else {         waitpid(child_pid,NULL,0);     }  }  //-----------------------------------------------  void rec_function(int ii)  {      if ( ii == 0 ) {std::cout << "int value==" << ii << "\n";}      else {rec_function(--ii);}      print_trace_gdb();  }   //-----------------------------------------------  int main() {    int jj=1;    std::cout << "\n---begin test-----\n";    std::cout << "int value==" << jj << "\n";    rec_function(jj);    std::cout << "---end test-----\n"; } 

Output from this code is

---begin test----- int value==1 int value==0 stack trace for /opt/cpp/linux_backtrace_gdb pid=4181 0x00007f878b5ca4ca in waitpid () from /lib/x86_64-linux-gnu/libc.so.6 [Current thread is 1 (process 4181)] #0  0x00007f878b5ca4ca in waitpid () from /lib/x86_64-linux-gnu/libc.so.6 #1  0x0000000000400e69 in print_trace_gdb () at linux_backtrace_gdb.cpp:25 #2  0x0000000000400ed2 in rec_function (ii=0) at linux_backtrace_gdb.cpp:34 #3  0x0000000000400ecd in rec_function (ii=0) at linux_backtrace_gdb.cpp:33 #4  0x0000000000400f29 in main () at linux_backtrace_gdb.cpp:43 stack trace for /opt/cpp/linux_backtrace_gdb pid=4181 0x00007f878b5ca4ca in waitpid () from /lib/x86_64-linux-gnu/libc.so.6 [Current thread is 1 (process 4181)] #0  0x00007f878b5ca4ca in waitpid () from /lib/x86_64-linux-gnu/libc.so.6 #1  0x0000000000400e69 in print_trace_gdb () at linux_backtrace_gdb.cpp:25 #2  0x0000000000400ed2 in rec_function (ii=0) at linux_backtrace_gdb.cpp:34 #3  0x0000000000400f29 in main () at linux_backtrace_gdb.cpp:43 ---end test----- 

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