test/sanitizer_common/TestCases/ptrace.cc

   1 // RUN: %clangxx -O0 %s -o %t && %run %t
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <sys/ptrace.h>
   7 #include <sys/types.h>
   8 #include <sys/user.h>
   9 #include <sys/wait.h>
  10 #include <unistd.h>
  11
  12 int main(void) {
  13   pid_t pid;
  14   pid = fork();
  15   if (pid == 0) { // child
  16     ptrace(PTRACE_TRACEME, 0, NULL, NULL);
  17     execl("/bin/true", "true", NULL);
  18   } else {
  19     wait(NULL);
  20     user_regs_struct regs;
  21     int res;
  22     res = ptrace(PTRACE_GETREGS, pid, NULL, &regs);
  23     assert(!res);
  24     if (regs.rip)
  25       printf("%zx\n", regs.rip);
  26
  27     user_fpregs_struct fpregs;
  28     res = ptrace(PTRACE_GETFPREGS, pid, NULL, &fpregs);
  29     assert(!res);
  30     if (fpregs.mxcsr)
  31       printf("%x\n", fpregs.mxcsr);
  32
  33     siginfo_t siginfo;
  34     res = ptrace(PTRACE_GETSIGINFO, pid, NULL, &siginfo);
  35     assert(!res);
  36     assert(siginfo.si_pid == pid);
  37
  38     ptrace(PTRACE_CONT, pid, NULL, NULL);
  39
  40     wait(NULL);
  41   }
  42   return 0;
  43 }