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// Copyright 2015 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/fxcrt/fx_memory.h"
#include <limits>
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const size_t kMaxByteAlloc = std::numeric_limits<size_t>::max();
const size_t kMaxIntAlloc = kMaxByteAlloc / sizeof(int);
const size_t kOverflowIntAlloc = kMaxIntAlloc + 100;
const size_t kWidth = 640;
const size_t kOverflowIntAlloc2D = kMaxIntAlloc / kWidth + 10;
} // namespace
TEST(fxcrt, FX_AllocZero) {
uint8_t* ptr = FX_Alloc(uint8_t, 0);
uint8_t* ptr2 = FX_Alloc(uint8_t, 0);
EXPECT_TRUE(ptr); // Malloc(0) is distinguishable from OOM.
EXPECT_NE(ptr, ptr2); // Each malloc(0) is distinguishable.
FX_Free(ptr2);
FX_Free(ptr);
}
// TODO(tsepez): re-enable OOM tests if we can find a way to
// prevent it from hosing the bots.
TEST(fxcrt, DISABLED_FX_AllocOOM) {
EXPECT_DEATH_IF_SUPPORTED((void)FX_Alloc(int, kMaxIntAlloc), "");
int* ptr = FX_Alloc(int, 1);
EXPECT_TRUE(ptr);
EXPECT_DEATH_IF_SUPPORTED((void)FX_Realloc(int, ptr, kMaxIntAlloc), "");
FX_Free(ptr);
}
TEST(fxcrt, FX_AllocOverflow) {
// |ptr| needs to be defined and used to avoid Clang optimizes away the
// FX_Alloc() statement overzealously for optimized builds.
int* ptr = nullptr;
EXPECT_DEATH_IF_SUPPORTED(ptr = FX_Alloc(int, kOverflowIntAlloc), "") << ptr;
ptr = FX_Alloc(int, 1);
EXPECT_TRUE(ptr);
EXPECT_DEATH_IF_SUPPORTED((void)FX_Realloc(int, ptr, kOverflowIntAlloc), "");
FX_Free(ptr);
}
TEST(fxcrt, FX_AllocOverflow2D) {
// |ptr| needs to be defined and used to avoid Clang optimizes away the
// FX_Alloc() statement overzealously for optimized builds.
int* ptr = nullptr;
EXPECT_DEATH_IF_SUPPORTED(ptr = FX_Alloc2D(int, kWidth, kOverflowIntAlloc2D),
"")
<< ptr;
}
TEST(fxcrt, DISABLED_FX_TryAllocOOM) {
EXPECT_FALSE(FX_TryAlloc(int, kMaxIntAlloc));
int* ptr = FX_Alloc(int, 1);
EXPECT_TRUE(ptr);
EXPECT_FALSE(FX_TryRealloc(int, ptr, kMaxIntAlloc));
FX_Free(ptr);
}
#if !defined(COMPILER_GCC)
TEST(fxcrt, FX_TryAllocOverflow) {
// |ptr| needs to be defined and used to avoid Clang optimizes away the
// calloc() statement overzealously for optimized builds.
int* ptr = (int*)calloc(sizeof(int), kOverflowIntAlloc);
EXPECT_FALSE(ptr) << ptr;
ptr = FX_Alloc(int, 1);
EXPECT_TRUE(ptr);
*ptr = 1492; // Arbitrary sentinel.
EXPECT_FALSE(FX_TryRealloc(int, ptr, kOverflowIntAlloc));
EXPECT_EQ(1492, *ptr);
FX_Free(ptr);
}
#endif
TEST(fxcrt, DISABLED_FXMEM_DefaultOOM) {
EXPECT_FALSE(FXMEM_DefaultAlloc(kMaxByteAlloc));
void* ptr = FXMEM_DefaultAlloc(1);
EXPECT_TRUE(ptr);
EXPECT_FALSE(FXMEM_DefaultRealloc(ptr, kMaxByteAlloc));
FXMEM_DefaultFree(ptr);
}
TEST(fxcrt, FXAlign) {
static_assert(std::numeric_limits<size_t>::max() % 2 == 1,
"numeric limit must be odd for this test");
size_t s0 = 0;
size_t s1 = 1;
size_t s2 = 2;
size_t sbig = std::numeric_limits<size_t>::max() - 2;
EXPECT_EQ(0u, FxAlignToBoundary<2>(s0));
EXPECT_EQ(2u, FxAlignToBoundary<2>(s1));
EXPECT_EQ(2u, FxAlignToBoundary<2>(s2));
EXPECT_EQ(std::numeric_limits<size_t>::max() - 1, FxAlignToBoundary<2>(sbig));
int i0 = 0;
int i511 = 511;
int i512 = 512;
int ineg = -513;
EXPECT_EQ(0, FxAlignToBoundary<512>(i0));
EXPECT_EQ(512, FxAlignToBoundary<512>(i511));
EXPECT_EQ(512, FxAlignToBoundary<512>(i512));
EXPECT_EQ(-512, FxAlignToBoundary<512>(ineg));
}
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