Vendor import of compiler-rt trunk r306956:vendor/compiler-rt/compiler-rt-trunk-r306956

https://llvm.org/svn/llvm-project/compiler-rt/trunk@306956

1 files changed, 123 insertions, 0 deletions

diff --git a/test/lsan/TestCases/allocator_returns_null.cc b/test/lsan/TestCases/allocator_returns_null.cc
new file mode 100644
index 000000000000..ab2c734e1e58
--- /dev/null
+++ b/test/lsan/TestCases/allocator_returns_null.cc
@@ -0,0 +1,123 @@
+// Test the behavior of malloc/calloc/realloc/new when the allocation size is
+// more than LSan allocator's max allowed one.
+// By default (allocator_may_return_null=0) the process should crash.
+// With allocator_may_return_null=1 the allocator should return 0, except the
+// operator new(), which should crash anyway (operator new(std::nothrow) should
+// return nullptr, indeed).
+//
+// RUN: %clangxx_lsan -O0 %s -o %t
+// RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t malloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-mNULL
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-cCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t calloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-cNULL
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-coCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t calloc-overflow 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-coNULL
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t realloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-rCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t realloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-rNULL
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-mrCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t realloc-after-malloc 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-mrNULL
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t new 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-nCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1 not %run %t new 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-nCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-nnCRASH
+// RUN: %env_lsan_opts=allocator_may_return_null=1     %run %t new-nothrow 2>&1 \
+// RUN:   | FileCheck %s --check-prefix=CHECK-nnNULL
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits>
+#include <new>
+
+int main(int argc, char **argv) {
+  // Disable stderr buffering. Needed on Windows.
+  setvbuf(stderr, NULL, _IONBF, 0);
+
+  assert(argc == 2);
+  const char *action = argv[1];
+  fprintf(stderr, "%s:\n", action);
+
+  // Use max of ASan and LSan allocator limits to cover both "lsan" and
+  // "lsan + asan" configs.
+  static const size_t kMaxAllowedMallocSizePlusOne =
+#if __LP64__ || defined(_WIN64)
+      (1ULL << 40) + 1;
+#else
+      (3UL << 30) + 1;
+#endif
+
+  void *x = 0;
+  if (!strcmp(action, "malloc")) {
+    x = malloc(kMaxAllowedMallocSizePlusOne);
+  } else if (!strcmp(action, "calloc")) {
+    x = calloc((kMaxAllowedMallocSizePlusOne / 4) + 1, 4);
+  } else if (!strcmp(action, "calloc-overflow")) {
+    volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
+    size_t kArraySize = 4096;
+    volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
+    x = calloc(kArraySize, kArraySize2);
+  } else if (!strcmp(action, "realloc")) {
+    x = realloc(0, kMaxAllowedMallocSizePlusOne);
+  } else if (!strcmp(action, "realloc-after-malloc")) {
+    char *t = (char*)malloc(100);
+    *t = 42;
+    x = realloc(t, kMaxAllowedMallocSizePlusOne);
+    assert(*t == 42);
+    free(t);
+  } else if (!strcmp(action, "new")) {
+    x = operator new(kMaxAllowedMallocSizePlusOne);
+  } else if (!strcmp(action, "new-nothrow")) {
+    x = operator new(kMaxAllowedMallocSizePlusOne, std::nothrow);
+  } else {
+    assert(0);
+  }
+
+  // The NULL pointer is printed differently on different systems, while (long)0
+  // is always the same.
+  fprintf(stderr, "x: %zu\n", (size_t)x);
+  free(x);
+
+  return x != 0;
+}
+
+// CHECK-mCRASH: malloc:
+// CHECK-mCRASH: Sanitizer's allocator is terminating the process
+// CHECK-cCRASH: calloc:
+// CHECK-cCRASH: Sanitizer's allocator is terminating the process
+// CHECK-coCRASH: calloc-overflow:
+// CHECK-coCRASH: Sanitizer's allocator is terminating the process
+// CHECK-rCRASH: realloc:
+// CHECK-rCRASH: Sanitizer's allocator is terminating the process
+// CHECK-mrCRASH: realloc-after-malloc:
+// CHECK-mrCRASH: Sanitizer's allocator is terminating the process
+// CHECK-nCRASH: new:
+// CHECK-nCRASH: Sanitizer's allocator is terminating the process
+// CHECK-nnCRASH: new-nothrow:
+// CHECK-nnCRASH: Sanitizer'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
+// CHECK-nnNULL: new-nothrow:
+// CHECK-nnNULL: x: 0