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-rw-r--r--test/asan/TestCases/allocator_returns_null.cc83
1 files changed, 83 insertions, 0 deletions
diff --git a/test/asan/TestCases/allocator_returns_null.cc b/test/asan/TestCases/allocator_returns_null.cc
new file mode 100644
index 000000000000..59a053c3dcad
--- /dev/null
+++ b/test/asan/TestCases/allocator_returns_null.cc
@@ -0,0 +1,83 @@
+// Test the behavior of malloc/calloc/realloc when the allocation size is huge.
+// By default (allocator_may_return_null=0) the process should crash.
+// With allocator_may_return_null=1 the allocator should return 0.
+//
+// RUN: %clangxx_asan -O0 %s -o %t
+// RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
+// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL
+
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <limits>
+int main(int argc, char **argv) {
+ volatile size_t size = std::numeric_limits<size_t>::max() - 10000;
+ assert(argc == 2);
+ char *x = 0;
+ if (!strcmp(argv[1], "malloc")) {
+ fprintf(stderr, "malloc:\n");
+ x = (char*)malloc(size);
+ }
+ if (!strcmp(argv[1], "calloc")) {
+ fprintf(stderr, "calloc:\n");
+ x = (char*)calloc(size / 4, 4);
+ }
+
+ if (!strcmp(argv[1], "calloc-overflow")) {
+ fprintf(stderr, "calloc-overflow:\n");
+ volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
+ size_t kArraySize = 4096;
+ volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
+ x = (char*)calloc(kArraySize, kArraySize2);
+ }
+
+ if (!strcmp(argv[1], "realloc")) {
+ fprintf(stderr, "realloc:\n");
+ x = (char*)realloc(0, size);
+ }
+ if (!strcmp(argv[1], "realloc-after-malloc")) {
+ fprintf(stderr, "realloc-after-malloc:\n");
+ char *t = (char*)malloc(100);
+ *t = 42;
+ x = (char*)realloc(t, size);
+ assert(*t == 42);
+ free(t);
+ }
+ // The NULL pointer is printed differently on different systems, while (long)0
+ // is always the same.
+ fprintf(stderr, "x: %lx\n", (long)x);
+ free(x);
+ return x != 0;
+}
+// CHECK-mCRASH: malloc:
+// CHECK-mCRASH: AddressSanitizer's allocator is terminating the process
+// CHECK-cCRASH: calloc:
+// CHECK-cCRASH: AddressSanitizer's allocator is terminating the process
+// CHECK-coCRASH: calloc-overflow:
+// CHECK-coCRASH: AddressSanitizer's allocator is terminating the process
+// CHECK-rCRASH: realloc:
+// CHECK-rCRASH: AddressSanitizer's allocator is terminating the process
+// CHECK-mrCRASH: realloc-after-malloc:
+// CHECK-mrCRASH: AddressSanitizer's allocator is terminating the process
+
+// CHECK-mNULL: malloc:
+// CHECK-mNULL: x: 0
+// CHECK-cNULL: calloc:
+// CHECK-cNULL: x: 0
+// CHECK-coNULL: calloc-overflow:
+// CHECK-coNULL: x: 0
+// CHECK-rNULL: realloc:
+// CHECK-rNULL: x: 0
+// CHECK-mrNULL: realloc-after-malloc:
+// CHECK-mrNULL: x: 0