forked from OSchip/llvm-project
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
// RUN: %clangxx_asan -O0 %s -o %t && %run %t
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// RUN: %clangxx_asan -DPOSITIVE -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdio.h>
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#include <sys/ptrace.h>
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#include <sys/types.h>
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#include <sys/user.h>
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#include <sys/wait.h>
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#include <unistd.h>
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int main(void) {
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pid_t pid;
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pid = fork();
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if (pid == 0) { // child
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ptrace(PTRACE_TRACEME, 0, NULL, NULL);
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execl("/bin/true", "true", NULL);
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} else {
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wait(NULL);
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user_regs_struct regs;
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int res;
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user_regs_struct * volatile pregs = ®s;
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#ifdef POSITIVE
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++pregs;
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#endif
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res = ptrace(PTRACE_GETREGS, pid, NULL, pregs);
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// CHECK: AddressSanitizer: stack-buffer-overflow
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// CHECK: {{.*ptrace.cc:}}[[@LINE-2]]
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assert(!res);
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#if __WORDSIZE == 64
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printf("%zx\n", regs.rip);
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#else
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printf("%lx\n", regs.eip);
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#endif
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user_fpregs_struct fpregs;
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res = ptrace(PTRACE_GETFPREGS, pid, NULL, &fpregs);
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assert(!res);
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printf("%lx\n", (unsigned long)fpregs.cwd);
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#if __WORDSIZE == 32
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user_fpxregs_struct fpxregs;
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res = ptrace(PTRACE_GETFPXREGS, pid, NULL, &fpxregs);
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assert(!res);
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printf("%lx\n", (unsigned long)fpxregs.mxcsr);
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#endif
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ptrace(PTRACE_CONT, pid, NULL, NULL);
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wait(NULL);
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}
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return 0;
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}
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