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
   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 #include "utils.h"
  38
  39 int main(int argc, char **argv) {
  40   assert(argc <= 3);
  41   bool test_size_max = argc == 3 && !untag_strcmp(argv[2], "max");
  42
  43   static const size_t kMaxAllowedMallocSize = 1ULL << 40;
  44   static const size_t kChunkHeaderSize = 16;
  45
  46   size_t MallocSize = test_size_max ? std::numeric_limits<size_t>::max()
  47                                     : kMaxAllowedMallocSize;
  48
  49   if (!untag_strcmp(argv[1], "malloc")) {
  50     void *p = malloc(MallocSize);
  51     assert(!p);
  52     p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize);
  53     assert(!p);
  54   } else if (!untag_strcmp(argv[1], "calloc")) {
  55     // Trigger an overflow in calloc.
  56     size_t size = std::numeric_limits<size_t>::max();
  57     void *p = calloc((size / 0x1000) + 1, 0x1000);
  58     assert(!p);
  59   } else if (!untag_strcmp(argv[1], "reallocarray")) {
  60     // Trigger an overflow in reallocarray.
  61     size_t size = std::numeric_limits<size_t>::max();
  62     void *p = __sanitizer_reallocarray(nullptr, (size / 0x1000) + 1, 0x1000);
  63     assert(!p);
  64   } else if (!untag_strcmp(argv[1], "new")) {
  65     void *p = operator new(MallocSize);
  66     assert(!p);
  67   } else if (!untag_strcmp(argv[1], "new-nothrow")) {
  68     void *p = operator new(MallocSize, std::nothrow);
  69     assert(!p);
  70   } else if (!untag_strcmp(argv[1], "usable")) {
  71     // Playing with the actual usable size of a chunk.
  72     void *p = malloc(1007);
  73     assert(p);
  74     size_t size = __sanitizer_get_allocated_size(p);
  75     assert(size >= 1007);
  76     memset(p, 'A', size);
  77     p = realloc(p, 2014);
  78     assert(p);
  79     size = __sanitizer_get_allocated_size(p);
  80     assert(size >= 2014);
  81     memset(p, 'B', size);
  82     free(p);
  83   } else {
  84     assert(0);
  85   }
  86
  87   return 0;
  88 }
  89
  90 // CHECK-max: {{ERROR: HWAddressSanitizer: requested allocation size .* exceeds maximum supported size}}
  91 // CHECK-oom: ERROR: HWAddressSanitizer: allocator is out of memory
  92 // CHECK-calloc: ERROR: HWAddressSanitizer: calloc parameters overflow
  93 // CHECK-reallocarray: ERROR: HWAddressSanitizer: reallocarray parameters overflow