Split memory-related routines out of base/process_util.h into base/process/memory.h.

base/process/memory_unittest.cc

Index: base/process/memory_unittest.cc
diff --git a/base/process/memory_unittest.cc b/base/process/memory_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8022301a98de5dbc992e270c40030581535ce54a
--- /dev/null
+++ b/base/process/memory_unittest.cc
@@ -0,0 +1,379 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include "base/process/memory.h"
+
+#include <limits>
+
+#include "base/compiler_specific.h"
+#include "base/debug/alias.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+#if defined(OS_POSIX)
+#include <errno.h>
+#endif
+#if defined(OS_MACOSX)
+#include <malloc/malloc.h>
+#include "base/process/memory_unittest_mac.h"
+#endif
+#if defined(OS_LINUX)
+#include <glib.h>
+#include <malloc.h>
+#endif
+
+#if defined(OS_WIN)
+// HeapQueryInformation function pointer.
+typedef BOOL (WINAPI* HeapQueryFn)  \
+    (HANDLE, HEAP_INFORMATION_CLASS, PVOID, SIZE_T, PSIZE_T);
+
+const int kConstantInModule = 42;
+
+TEST(ProcessMemoryTest, GetModuleFromAddress) {
+  // Since the unit tests are their own EXE, this should be
+  // equivalent to the EXE's HINSTANCE.
+  //
+  // kConstantInModule is a constant in this file and
+  // therefore within the unit test EXE.
+  EXPECT_EQ(::GetModuleHandle(NULL),
+            base::GetModuleFromAddress(
+                const_cast<int*>(&kConstantInModule)));
+
+  // Any address within the kernel32 module should return
+  // kernel32's HMODULE.  Our only assumption here is that
+  // kernel32 is larger than 4 bytes.
+  HMODULE kernel32 = ::GetModuleHandle(L"kernel32.dll");
+  HMODULE kernel32_from_address =
+      base::GetModuleFromAddress(reinterpret_cast<DWORD*>(kernel32) + 1);
+  EXPECT_EQ(kernel32, kernel32_from_address);
+}
+
+TEST(ProcessMemoryTest, EnableLFH) {
+  ASSERT_TRUE(base::EnableLowFragmentationHeap());
+  if (IsDebuggerPresent()) {
+    // Under these conditions, LFH can't be enabled. There's no point to test
+    // anything.
+    const char* no_debug_env = getenv("_NO_DEBUG_HEAP");
+    if (!no_debug_env || strcmp(no_debug_env, "1"))
+      return;
+  }
+  HMODULE kernel32 = GetModuleHandle(L"kernel32.dll");
+  ASSERT_TRUE(kernel32 != NULL);
+  HeapQueryFn heap_query = reinterpret_cast<HeapQueryFn>(GetProcAddress(
+      kernel32,
+      "HeapQueryInformation"));
+
+  // On Windows 2000, the function is not exported. This is not a reason to
+  // fail but we won't be able to retrieves information about the heap, so we
+  // should stop here.
+  if (heap_query == NULL)
+    return;
+
+  HANDLE heaps[1024] = { 0 };
+  unsigned number_heaps = GetProcessHeaps(1024, heaps);
+  EXPECT_GT(number_heaps, 0u);
+  for (unsigned i = 0; i < number_heaps; ++i) {
+    ULONG flag = 0;
+    SIZE_T length;
+    ASSERT_NE(0, heap_query(heaps[i],
+                            HeapCompatibilityInformation,
+                            &flag,
+                            sizeof(flag),
+                            &length));
+    // If flag is 0, the heap is a standard heap that does not support
+    // look-asides. If flag is 1, the heap supports look-asides. If flag is 2,
+    // the heap is a low-fragmentation heap (LFH). Note that look-asides are not
+    // supported on the LFH.
+
+    // We don't have any documented way of querying the HEAP_NO_SERIALIZE flag.
+    EXPECT_LE(flag, 2u);
+    EXPECT_NE(flag, 1u);
+  }
+}
+#endif  // defined(OS_WIN)
+
+#if defined(OS_MACOSX)
+
+// For the following Mac tests:
+// Note that base::EnableTerminationOnHeapCorruption() is called as part of
+// test suite setup and does not need to be done again, else mach_override
+// will fail.
+
+#if !defined(ADDRESS_SANITIZER)
+// The following code tests the system implementation of malloc() thus no need
+// to test it under AddressSanitizer.
+TEST(ProcessMemoryTest, MacMallocFailureDoesNotTerminate) {
+  // Test that ENOMEM doesn't crash via CrMallocErrorBreak two ways: the exit
+  // code and lack of the error string. The number of bytes is one less than
+  // MALLOC_ABSOLUTE_MAX_SIZE, more than which the system early-returns NULL and
+  // does not call through malloc_error_break(). See the comment at
+  // EnableTerminationOnOutOfMemory() for more information.
+  void* buf = NULL;
+  ASSERT_EXIT(
+      {
+        base::EnableTerminationOnOutOfMemory();
+
+        buf = malloc(std::numeric_limits<size_t>::max() - (2 * PAGE_SIZE) - 1);
+      },
+      testing::KilledBySignal(SIGTRAP),
+      "\\*\\*\\* error: can't allocate region.*"
+          "(Terminating process due to a potential for future heap "
+          "corruption){0}");
+
+  base::debug::Alias(buf);
+}
+#endif  // !defined(ADDRESS_SANITIZER)
+
+TEST(ProcessMemoryTest, MacTerminateOnHeapCorruption) {
+  // Assert that freeing an unallocated pointer will crash the process.
+  char buf[3];
+  asm("" : "=r" (buf));  // Prevent clang from being too smart.
+#if ARCH_CPU_64_BITS
+  // On 64 bit Macs, the malloc system automatically abort()s on heap corruption
+  // but does not output anything.
+  ASSERT_DEATH(free(buf), "");
+#elif defined(ADDRESS_SANITIZER)
+  // AddressSanitizer replaces malloc() and prints a different error message on
+  // heap corruption.
+  ASSERT_DEATH(free(buf), "attempting free on address which "
+      "was not malloc\\(\\)-ed");
+#else
+  ASSERT_DEATH(free(buf), "being freed.*"
+      "\\*\\*\\* set a breakpoint in malloc_error_break to debug.*"
+      "Terminating process due to a potential for future heap corruption");
+#endif  // ARCH_CPU_64_BITS || defined(ADDRESS_SANITIZER)
+}
+
+#endif  // defined(OS_MACOSX)
+
+// Android doesn't implement set_new_handler, so we can't use the
+// OutOfMemoryTest cases.
+// OpenBSD does not support these tests either.
+// AddressSanitizer and ThreadSanitizer define the malloc()/free()/etc.
+// functions so that they don't crash if the program is out of memory, so the
+// OOM tests aren't supposed to work.
+// TODO(vandebo) make this work on Windows too.
+#if !defined(OS_ANDROID) && !defined(OS_OPENBSD) && \
+    !defined(OS_WIN) && \
+    !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER)
+
+#if defined(USE_TCMALLOC)
+extern "C" {
+int tc_set_new_mode(int mode);
+}
+#endif  // defined(USE_TCMALLOC)
+
+class OutOfMemoryDeathTest : public testing::Test {
+ public:
+  OutOfMemoryDeathTest()
+      : value_(NULL),
+        // Make test size as large as possible minus a few pages so
+        // that alignment or other rounding doesn't make it wrap.
+        test_size_(std::numeric_limits<std::size_t>::max() - 12 * 1024),
+        signed_test_size_(std::numeric_limits<ssize_t>::max()) {
+  }
+
+#if defined(USE_TCMALLOC)
+  virtual void SetUp() OVERRIDE {
+    tc_set_new_mode(1);
+  }
+
+  virtual void TearDown() OVERRIDE {
+    tc_set_new_mode(0);
+  }
+#endif  // defined(USE_TCMALLOC)
+
+  void SetUpInDeathAssert() {
+    // Must call EnableTerminationOnOutOfMemory() because that is called from
+    // chrome's main function and therefore hasn't been called yet.
+    // Since this call may result in another thread being created and death
+    // tests shouldn't be started in a multithread environment, this call
+    // should be done inside of the ASSERT_DEATH.
+    base::EnableTerminationOnOutOfMemory();
+  }
+
+  void* value_;
+  size_t test_size_;
+  ssize_t signed_test_size_;
+};
+
+TEST_F(OutOfMemoryDeathTest, New) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = operator new(test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, NewArray) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = new char[test_size_];
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, Malloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc(test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, Realloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = realloc(NULL, test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, Calloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = calloc(1024, test_size_ / 1024L);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, Valloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = valloc(test_size_);
+    }, "");
+}
+
+#if defined(OS_LINUX)
+TEST_F(OutOfMemoryDeathTest, Pvalloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = pvalloc(test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, Memalign) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = memalign(4, test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, ViaSharedLibraries) {
+  // g_try_malloc is documented to return NULL on failure. (g_malloc is the
+  // 'safe' default that crashes if allocation fails). However, since we have
+  // hopefully overridden malloc, even g_try_malloc should fail. This tests
+  // that the run-time symbol resolution is overriding malloc for shared
+  // libraries as well as for our code.
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = g_try_malloc(test_size_);
+    }, "");
+}
+#endif  // OS_LINUX
+
+// Android doesn't implement posix_memalign().
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+TEST_F(OutOfMemoryDeathTest, Posix_memalign) {
+  // Grab the return value of posix_memalign to silence a compiler warning
+  // about unused return values. We don't actually care about the return
+  // value, since we're asserting death.
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      EXPECT_EQ(ENOMEM, posix_memalign(&value_, 8, test_size_));
+    }, "");
+}
+#endif  // defined(OS_POSIX) && !defined(OS_ANDROID)
+
+#if defined(OS_MACOSX)
+
+// Purgeable zone tests
+
+TEST_F(OutOfMemoryDeathTest, MallocPurgeable) {
+  malloc_zone_t* zone = malloc_default_purgeable_zone();
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc_zone_malloc(zone, test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, ReallocPurgeable) {
+  malloc_zone_t* zone = malloc_default_purgeable_zone();
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc_zone_realloc(zone, NULL, test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, CallocPurgeable) {
+  malloc_zone_t* zone = malloc_default_purgeable_zone();
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc_zone_calloc(zone, 1024, test_size_ / 1024L);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, VallocPurgeable) {
+  malloc_zone_t* zone = malloc_default_purgeable_zone();
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc_zone_valloc(zone, test_size_);
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, PosixMemalignPurgeable) {
+  malloc_zone_t* zone = malloc_default_purgeable_zone();
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      value_ = malloc_zone_memalign(zone, 8, test_size_);
+    }, "");
+}
+
+// Since these allocation functions take a signed size, it's possible that
+// calling them just once won't be enough to exhaust memory. In the 32-bit
+// environment, it's likely that these allocation attempts will fail because
+// not enough contiguous address space is available. In the 64-bit environment,
+// it's likely that they'll fail because they would require a preposterous
+// amount of (virtual) memory.
+
+TEST_F(OutOfMemoryDeathTest, CFAllocatorSystemDefault) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      while ((value_ =
+              base::AllocateViaCFAllocatorSystemDefault(signed_test_size_))) {}
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, CFAllocatorMalloc) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      while ((value_ =
+              base::AllocateViaCFAllocatorMalloc(signed_test_size_))) {}
+    }, "");
+}
+
+TEST_F(OutOfMemoryDeathTest, CFAllocatorMallocZone) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      while ((value_ =
+              base::AllocateViaCFAllocatorMallocZone(signed_test_size_))) {}
+    }, "");
+}
+
+#if !defined(ARCH_CPU_64_BITS)
+
+// See process_util_unittest_mac.mm for an explanation of why this test isn't
+// run in the 64-bit environment.
+
+TEST_F(OutOfMemoryDeathTest, PsychoticallyBigObjCObject) {
+  ASSERT_DEATH({
+      SetUpInDeathAssert();
+      while ((value_ = base::AllocatePsychoticallyBigObjCObject())) {}
+    }, "");
+}
+
+#endif  // !ARCH_CPU_64_BITS
+#endif  // OS_MACOSX
+
+#endif  // !defined(OS_ANDROID) && !defined(OS_OPENBSD) &&
+        // !defined(OS_WIN) && !defined(ADDRESS_SANITIZER)