compiler-rt/test/hwasan/TestCases/sizes.cpp

   1 // This test requires operator new to be intercepted by the hwasan runtime,
   2 // so we need to avoid linking against libc++.
   3 // RUN: %clangxx_hwasan %s -nostdlib++ -lstdc++ -o %t || %clangxx_hwasan %s -o %t
   4 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1          | FileCheck %s --check-prefix=CHECK-max
   5 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t malloc 2>&1
   6 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc max 2>&1      | FileCheck %s --check-prefix=CHECK-max
   7 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t malloc max 2>&1
   8 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1          | FileCheck %s --check-prefix=CHECK-calloc
   9 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t calloc 2>&1
  10 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t reallocarray 2>&1    | FileCheck %s --check-prefix=CHECK-reallocarray
  11 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t reallocarray 2>&1
  12 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new 2>&1             | FileCheck %s --check-prefix=CHECK-max
  13 // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new 2>&1             | FileCheck %s --check-prefix=CHECK-oom
  14 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new max 2>&1         | FileCheck %s --check-prefix=CHECK-max
  15 // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new max 2>&1         | FileCheck %s --check-prefix=CHECK-oom
  16 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1     | FileCheck %s --check-prefix=CHECK-max
  17 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t new-nothrow 2>&1
  18 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow max 2>&1 | FileCheck %s --check-prefix=CHECK-max
  19 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t new-nothrow max 2>&1
  20 // RUN:                                                 %run %t usable 2>&1
  21
  22 // Tests for various edge cases related to sizes, notably the maximum size the
  23 // allocator can allocate. Tests that an integer overflow in the parameters of
  24 // calloc is caught.
  25
  26 #include <assert.h>
  27 #include <malloc.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <limits>
  32 #include <new>
  33
  34 #include <sanitizer/allocator_interface.h>
  35 #include <sanitizer/hwasan_interface.h>
  36
  37 int main(int argc, char **argv) {
  38   assert(argc <= 3);
  39   bool test_size_max = argc == 3 && !strcmp(argv[2], "max");
  40
  41   static const size_t kMaxAllowedMallocSize = 1ULL << 40;
  42   static const size_t kChunkHeaderSize = 16;
  43
  44   size_t MallocSize = test_size_max ? std::numeric_limits<size_t>::max()
  45                                     : (kMaxAllowedMallocSize + 1);
  46
  47   if (!strcmp(argv[1], "malloc")) {
  48     void *p = malloc(MallocSize);
  49     assert(!p);
  50   } else if (!strcmp(argv[1], "calloc")) {
  51     // Trigger an overflow in calloc.
  52     size_t size = std::numeric_limits<size_t>::max();
  53     void *p = calloc((size / 0x1000) + 1, 0x1000);
  54     assert(!p);
  55   } else if (!strcmp(argv[1], "reallocarray")) {
  56     // Trigger an overflow in reallocarray.
  57     size_t size = std::numeric_limits<size_t>::max();
  58     void *p = __sanitizer_reallocarray(nullptr, (size / 0x1000) + 1, 0x1000);
  59     assert(!p);
  60   } else if (!strcmp(argv[1], "new")) {
  61     void *p = operator new(MallocSize);
  62     assert(!p);
  63   } else if (!strcmp(argv[1], "new-nothrow")) {
  64     void *p = operator new(MallocSize, std::nothrow);
  65     assert(!p);
  66   } else if (!strcmp(argv[1], "usable")) {
  67     // Playing with the actual usable size of a chunk.
  68     void *p = malloc(1007);
  69     assert(p);
  70     size_t size = __sanitizer_get_allocated_size(p);
  71     assert(size >= 1007);
  72     memset(p, 'A', size);
  73     p = realloc(p, 2014);
  74     assert(p);
  75     size = __sanitizer_get_allocated_size(p);
  76     assert(size >= 2014);
  77     memset(p, 'B', size);
  78     free(p);
  79   } else {
  80     assert(0);
  81   }
  82
  83   return 0;
  84 }
  85
  86 // CHECK-max: {{ERROR: HWAddressSanitizer: requested allocation size .* exceeds maximum supported size}}
  87 // CHECK-oom: ERROR: HWAddressSanitizer: out of memory: allocator is trying to allocate
  88 // CHECK-calloc: ERROR: HWAddressSanitizer: calloc parameters overflow
  89 // CHECK-reallocarray: ERROR: HWAddressSanitizer: reallocarray parameters overflow