1 // RUN: %clangxx_asan -O0 %s -o %t && %t 2 // RUN: %clangxx_asan -DPOSITIVE -O0 %s -o %t && not %t 2>&1 | FileCheck %s 3 4 #include <assert.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 user_regs_struct * volatile pregs = ®s; 23 #ifdef POSITIVE 24 ++pregs; 25 #endif 26 res = ptrace(PTRACE_GETREGS, pid, NULL, pregs); 27 // CHECK: AddressSanitizer: stack-buffer-overflow 28 // CHECK: {{.*ptrace.cc:}}[[@LINE-2]] 29 assert(!res); 30 #if __WORDSIZE == 64 31 printf("%zx\n", regs.rip); 32 #else 33 printf("%lx\n", regs.eip); 34 #endif 35 36 user_fpregs_struct fpregs; 37 res = ptrace(PTRACE_GETFPREGS, pid, NULL, &fpregs); 38 assert(!res); 39 printf("%lx\n", (unsigned long)fpregs.cwd); 40 41 #if __WORDSIZE == 32 42 user_fpxregs_struct fpxregs; 43 res = ptrace(PTRACE_GETFPXREGS, pid, NULL, &fpxregs); 44 assert(!res); 45 printf("%lx\n", (unsigned long)fpxregs.mxcsr); 46 #endif 47 48 ptrace(PTRACE_CONT, pid, NULL, NULL); 49 wait(NULL); 50 } 51 return 0; 52 } 53
