compiler-rt/test/scudo/sizes.cpp

   1 // RUN: %clangxx_scudo %s -lstdc++ -o %t
   2 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t malloc 2>&1      | FileCheck %s --check-prefix=CHECK-max
   3 // RUN: %env_scudo_opts=allocator_may_return_null=1     %run %t malloc 2>&1
   4 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t calloc 2>&1      | FileCheck %s --check-prefix=CHECK-calloc
   5 // RUN: %env_scudo_opts=allocator_may_return_null=1     %run %t calloc 2>&1
   6 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new 2>&1         | FileCheck %s --check-prefix=CHECK-max
   7 // RUN: %env_scudo_opts=allocator_may_return_null=1 not %run %t new 2>&1         | FileCheck %s --check-prefix=CHECK-oom
   8 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max
   9 // RUN: %env_scudo_opts=allocator_may_return_null=1     %run %t new-nothrow 2>&1
  10 // RUN:                                                 %run %t usable 2>&1
  11
  12 // Tests for various edge cases related to sizes, notably the maximum size the
  13 // allocator can allocate. Tests that an integer overflow in the parameters of
  14 // calloc is caught.
  15
  16 #include <assert.h>
  17 #include <malloc.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20
  21 #include <limits>
  22 #include <new>
  23
  24 #include <sanitizer/allocator_interface.h>
  25
  26 int main(int argc, char **argv) {
  27   assert(argc == 2);
  28
  29 #if __LP64__ || defined(_WIN64)
  30   static const size_t kMaxAllowedMallocSize = 1ULL << 40;
  31   static const size_t kChunkHeaderSize = 16;
  32 #else
  33   static const size_t kMaxAllowedMallocSize = 2UL << 30;
  34   static const size_t kChunkHeaderSize = 8;
  35 #endif
  36
  37   if (!strcmp(argv[1], "malloc")) {
  38     void *p = malloc(kMaxAllowedMallocSize);
  39     assert(!p);
  40     p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize);
  41     assert(!p);
  42   } else if (!strcmp(argv[1], "calloc")) {
  43     // Trigger an overflow in calloc.
  44     size_t size = std::numeric_limits<size_t>::max();
  45     void *p = calloc((size / 0x1000) + 1, 0x1000);
  46     assert(!p);
  47   } else if (!strcmp(argv[1], "new")) {
  48     void *p = operator new(kMaxAllowedMallocSize);
  49     assert(!p);
  50   } else if (!strcmp(argv[1], "new-nothrow")) {
  51     void *p = operator new(kMaxAllowedMallocSize, std::nothrow);
  52     assert(!p);
  53   } else if (!strcmp(argv[1], "usable")) {
  54     // Playing with the actual usable size of a chunk.
  55     void *p = malloc(1007);
  56     assert(p);
  57     size_t size = __sanitizer_get_allocated_size(p);
  58     assert(size >= 1007);
  59     memset(p, 'A', size);
  60     p = realloc(p, 2014);
  61     assert(p);
  62     size = __sanitizer_get_allocated_size(p);
  63     assert(size >= 2014);
  64     memset(p, 'B', size);
  65     free(p);
  66   } else {
  67     assert(0);
  68   }
  69
  70   return 0;
  71 }
  72
  73 // CHECK-max: {{Scudo ERROR: requested allocation size .* exceeds maximum supported size}}
  74 // CHECK-oom: Scudo ERROR: allocator is out of memory
  75 // CHECK-calloc: Scudo ERROR: calloc parameters overflow