将gdb 用作函数跟踪器 (Function Tracer) 参考: http://dustymabe.com/2012/10/14/trace-function-calls-using-gdb/ 可以使用下面的脚本来把 gdb 作为一个函数跟踪器。 #!/bin/sh # Make a function call trace using GDB. This is stupid, but it s
telescope 0xb7d88000 40 tracecall -- Trace function calls made by the program tracecall tracecall "cpy,printf" tracecall "-puts,fflush" traceinst -- Trace specific instructions executed by the program traceinst 20 traceinst "cmp,xor" unptrace -- Disable anti-ptrace detection unptrace utils ...
void do_tracee( void ) { printf( "tracee process %ld\n", (long)getpid() ); if (ptrace( PTRACE_TRACEME, 0, NULL, NULL )) { perror( "tracee error!" ); return; } execve( "test", NULL, NULL); // test 是一个可执行程序 } int main() { pid_t child; child = fork(); if ...
calltrace is a gdb plugin to track flow of function calls and returns in a style similar to DTrace flowindent, but with an output that can be manipulated using (emacs) orgmode. - bx/calltrace
当application通过syscall进入内核之后(这里略过了gdb通过ptrace设置SYSCALL_WORK_SYSCALL_TRACE的路径),会通过该调用链触发ptrace_report_syscall_entry。ptrace_report_syscall_entry函数会发送SIGTRAP信号,调试器会捕捉到该信号并做后续处理。 也就是说:gdb实现该功能,主要是依赖内核提供的功能。
以这种方式直接运行时,首先,gdb解析a.out文件的符号。接下来我们输入 run 命令,gdb通过 fork() 一个新进程,然后通过 ptrace(PTRACE_TRACEME, 0, NULL, NULL); 设置traceme模式。最后执行 exec 启动加载要调试的文件。 attach pid 在调试PWN题时,通过attach pid来追踪要调试的进程。gdb...
tracecall -- Trace function calls made by the program tracecall tracecall "cpy,printf" tracecall "-puts,fflush" traceinst -- Trace specific instructions executed by the program traceinst 20 traceinst "cmp,xor" unptrace -- Disable anti-ptrace detection unptrace utils -- Miscelaneous uti...
calls to vfork thbreak -- Set a temporary hardware assisted breakpoint trace -- Set a tracepoint at specified line or function watch -- Set a watchpoint for an expression Command class: data agent-printf -- Agent-printf "printf format string" append -- Append target code/data to a ...
(cuda-gdb) info cuda launch trace Lvl Kernel Dev Grid Status GridDim BlockDim Invocation *0 3 0 -7 Active (32,1,1) (16,1,1) kernel3(c=5) 1 2 0 -5 Terminated (240,1,1) (128,1,1) kernel2(b=3) 2 10 2 Active (240,1,1) (128,1,1) kernel1(a=1) A kernel that ...
(cuda-gdb) info cuda launch trace Lvl Kernel Dev Grid Status GridDim BlockDim Invocation *0 3 0 -7 Active (32,1,1) (16,1,1) kernel3(c=5) 1 2 0 -5 Terminated (240,1,1) (128,1,1) kernel2(b=3) 2 10 2 Active (240,1,1) (128,1,1) kernel1(a=1) A kernel that ...