compiler-rt/test/asan/TestCases/Linux/interception_readdir_r_test.cpp

   1 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=316
   2 // XFAIL: android
   3
   4 // RUN: rm -rf %t-dir
   5 // RUN: mkdir -p %t-dir
   6 //
   7 // RUN: %clangxx_asan -O0 %s -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
   8 // RUN: %clangxx_asan -O1 %s -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
   9 // RUN: %clangxx_asan -O2 %s -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  10 // RUN: %clangxx_asan -O3 %s -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  11 //
  12 // RUN: %clangxx_asan -O0 %s -D_FILE_OFFSET_BITS=64 -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  13 // RUN: %clangxx_asan -O1 %s -D_FILE_OFFSET_BITS=64 -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  14 // RUN: %clangxx_asan -O2 %s -D_FILE_OFFSET_BITS=64 -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  15 // RUN: %clangxx_asan -O3 %s -D_FILE_OFFSET_BITS=64 -DTEMP_DIR='"'"%t-dir"'"' -o %t && %run %t 2>&1 | FileCheck %s
  16
  17 #include <dirent.h>
  18 #include <memory.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22
  23
  24 int main() {
  25   // Ensure the readdir_r interceptor doesn't erroneously mark the entire dirent
  26   // as written when the end of the directory pointer is reached.
  27   fputs("test1: reading the " TEMP_DIR " directory...\n", stderr);
  28   DIR *d = opendir(TEMP_DIR);
  29   struct dirent *result = (struct dirent *)(0xfeedbeef);
  30   // We assume the temp dir for this test doesn't have crazy long file names.
  31   char entry_buffer[4096];
  32   memset(entry_buffer, 0xab, sizeof(entry_buffer));
  33   unsigned count = 0;
  34   do {
  35     // Stamp the entry struct to try to trick the interceptor.
  36     ((struct dirent *)entry_buffer)->d_reclen = 9999;
  37     if (readdir_r(d, (struct dirent *)entry_buffer, &result) != 0)
  38       abort();
  39     ++count;
  40   } while (result != NULL);
  41   fprintf(stderr, "read %d entries\n", count);
  42   closedir(d);
  43   // CHECK: test1: reading the {{.*}} directory...
  44   // CHECK-NOT: stack-buffer-overflow
  45   // CHECK: read {{.*}} entries
  46
  47   // Ensure the readdir64_r interceptor doesn't have the bug either.
  48   fputs("test2: reading the " TEMP_DIR " directory...\n", stderr);
  49   d = opendir(TEMP_DIR);
  50   struct dirent64 *result64;
  51   memset(entry_buffer, 0xab, sizeof(entry_buffer));
  52   count = 0;
  53   do {
  54     // Stamp the entry struct to try to trick the interceptor.
  55     ((struct dirent64 *)entry_buffer)->d_reclen = 9999;
  56     if (readdir64_r(d, (struct dirent64 *)entry_buffer, &result64) != 0)
  57       abort();
  58     ++count;
  59   } while (result64 != NULL);
  60   fprintf(stderr, "read %d entries\n", count);
  61   closedir(d);
  62   // CHECK: test2: reading the {{.*}} directory...
  63   // CHECK-NOT: stack-buffer-overflow
  64   // CHECK: read {{.*}} entries
  65 }