gcc C ++程序崩溃时如何自动生成stacktrace?
对于Linux,我们可以使用gcc编译C/C++代码。该编译器使用glibc库。我们可以使用该backtrace()函数来跟踪错误。该函数位于execinfo.h头文件中。在此示例中,我们将使用堆栈跟踪功能显示细分错误。
示例
#include <iostream>
#include <execinfo.h>
#include <signal.h>
#include <cstdlib>
#include <unistd.h>
using namespace std;
void error_handler(int sig) {
void *array[10];
size_t size;
size = backtrace(array, 10); //get the void pointers for all of the entries
cout << "Error: signal "<< sig <<":\n"; //display error signal
backtrace_symbols_fd(array, size, STDERR_FILENO);
exit(1);
}
void invalid_index() {
int *ptr = (int*) - 1;
cout << *ptr << endl; // segmentation error
}
void func1() {
invalid_index();
}
void func2() {
func1();
}
int main(int argc, char **argv) {
signal(SIGSEGV, error_handler); // use handler to print the errors
func2(); // this will call all other function to generate error
}输出结果
Error: signal 11: ./a.out(+0x825)[0x5579a31d7825] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f7689009f20] ./a.out(+0x880)[0x5579a31d7880] ./a.out(+0x8a1)[0x5579a31d78a1] ./a.out(+0x8ad)[0x5579a31d78ad] ./a.out(+0x8d5)[0x5579a31d78d5] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f7688fecb97] ./a.out(+0x71a)[0x5579a31d771a]