src/compiler-rt/test/asan/TestCases/Linux/ptrace.cc

   1 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=316
   2 // XFAIL: android
   3 // XFAIL: mips
   4 //
   5 // RUN: %clangxx_asan -O0 %s -o %t && %run %t
   6 // RUN: %clangxx_asan -DPOSITIVE -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   7
   8 #include <assert.h>
   9 #include <stdio.h>
  10 #include <sys/ptrace.h>
  11 #include <sys/types.h>
  12 #include <sys/user.h>
  13 #include <sys/wait.h>
  14 #include <unistd.h>
  15 #include <sys/uio.h> // for iovec
  16 #include <elf.h> // for NT_PRSTATUS
  17 #ifdef __aarch64__
  18 # include <asm/ptrace.h>
  19 #endif
  20
  21 #if defined(__i386__) || defined(__x86_64__)
  22 typedef user_regs_struct   regs_struct;
  23 typedef user_fpregs_struct fpregs_struct;
  24 #if defined(__i386__)
  25 #define REG_IP  eip
  26 #else
  27 #define REG_IP  rip
  28 #endif
  29 #define PRINT_REG_PC(__regs)    printf ("%lx\n", (unsigned long) (__regs.REG_IP))
  30 #define PRINT_REG_FP(__fpregs)  printf ("%lx\n", (unsigned long) (__fpregs.cwd))
  31 #define __PTRACE_FPREQUEST PTRACE_GETFPREGS
  32
  33 #elif defined(__aarch64__)
  34 typedef struct user_pt_regs      regs_struct;
  35 typedef struct user_fpsimd_state fpregs_struct;
  36 #define PRINT_REG_PC(__regs)    printf ("%x\n", (unsigned) (__regs.pc))
  37 #define PRINT_REG_FP(__fpregs)  printf ("%x\n", (unsigned) (__fpregs.fpsr))
  38 #define ARCH_IOVEC_FOR_GETREGSET
  39
  40 #elif defined(__powerpc64__)
  41 typedef struct pt_regs regs_struct;
  42 typedef elf_fpregset_t fpregs_struct;
  43 #define PRINT_REG_PC(__regs)    printf ("%lx\n", (unsigned long) (__regs.nip))
  44 #define PRINT_REG_FP(__fpregs)  printf ("%lx\n", (elf_greg_t)fpregs[32])
  45 #define ARCH_IOVEC_FOR_GETREGSET
  46
  47 #elif defined(__mips__)
  48 typedef struct pt_regs regs_struct;
  49 typedef elf_fpregset_t fpregs_struct;
  50 #define PRINT_REG_PC(__regs)    printf ("%lx\n", (unsigned long) (__regs.cp0_epc))
  51 #define PRINT_REG_FP(__fpregs)  printf ("%lx\n", (elf_greg_t) (__fpregs[32]))
  52 #define __PTRACE_FPREQUEST PTRACE_GETFPREGS
  53
  54 #elif defined(__arm__)
  55 # include <asm/ptrace.h>
  56 # include <sys/procfs.h>
  57 typedef struct pt_regs regs_struct;
  58 typedef char fpregs_struct[ARM_VFPREGS_SIZE];
  59 #define PRINT_REG_PC(__regs)    printf ("%x\n", (unsigned) (__regs.ARM_pc))
  60 #define PRINT_REG_FP(__fpregs)  printf ("%x\n", (unsigned) (__fpregs + 32 * 8))
  61 #define __PTRACE_FPREQUEST PTRACE_GETVFPREGS
  62 #endif
  63
  64
  65 int main(void) {
  66   pid_t pid;
  67   pid = fork();
  68   if (pid == 0) { // child
  69     ptrace(PTRACE_TRACEME, 0, NULL, NULL);
  70     execl("/bin/true", "true", NULL);
  71   } else {
  72     wait(NULL);
  73     regs_struct regs;
  74     regs_struct* volatile pregs = &regs;
  75 #ifdef ARCH_IOVEC_FOR_GETREGSET
  76     struct iovec regset_io;
  77 #endif
  78     int res;
  79
  80 #ifdef POSITIVE
  81     ++pregs;
  82 #endif
  83
  84 #ifdef ARCH_IOVEC_FOR_GETREGSET
  85 # define __PTRACE_REQUEST  PTRACE_GETREGSET
  86 # define __PTRACE_ARGS     (void*)NT_PRSTATUS, (void*)&regset_io
  87     regset_io.iov_base = pregs;
  88     regset_io.iov_len = sizeof(regs_struct);
  89 #else
  90 # define __PTRACE_REQUEST  PTRACE_GETREGS
  91 # define __PTRACE_ARGS     NULL, pregs
  92 #endif
  93     res = ptrace((enum __ptrace_request)__PTRACE_REQUEST, pid, __PTRACE_ARGS);
  94     // CHECK: AddressSanitizer: stack-buffer-overflow
  95     // CHECK: {{.*ptrace.cc:}}[[@LINE-2]]
  96     assert(!res);
  97     PRINT_REG_PC(regs);
  98
  99     fpregs_struct fpregs;
 100 #ifdef ARCH_IOVEC_FOR_GETREGSET
 101 # define __PTRACE_FPREQUEST  PTRACE_GETREGSET
 102 # define __PTRACE_FPARGS     (void*)NT_PRSTATUS, (void*)&regset_io
 103     regset_io.iov_base = &fpregs;
 104     regset_io.iov_len = sizeof(fpregs_struct);
 105     res = ptrace((enum __ptrace_request)PTRACE_GETREGSET, pid, (void*)NT_FPREGSET,
 106                  (void*)&regset_io);
 107 #else
 108 # define __PTRACE_FPARGS     NULL, &fpregs
 109 #endif
 110     res = ptrace((enum __ptrace_request)__PTRACE_FPREQUEST, pid, __PTRACE_FPARGS);
 111     assert(!res);
 112     PRINT_REG_FP(fpregs);
 113
 114 #ifdef __i386__
 115     user_fpxregs_struct fpxregs;
 116     res = ptrace(PTRACE_GETFPXREGS, pid, NULL, &fpxregs);
 117     assert(!res);
 118     printf("%lx\n", (unsigned long)fpxregs.mxcsr);
 119 #endif
 120
 121     ptrace(PTRACE_CONT, pid, NULL, NULL);
 122     wait(NULL);
 123   }
 124   return 0;
 125 }