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// Copyright (c) 2011, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// memory_range_unittest.cc: Unit tests for google_breakpad::MemoryRange.
#include "breakpad_googletest_includes.h"
#include "common/memory_range.h"
using google_breakpad::MemoryRange;
using testing::Message;
namespace {
const uint32_t kBuffer[10] = { 0 };
const size_t kBufferSize = sizeof(kBuffer);
const uint8_t* kBufferPointer = reinterpret_cast<const uint8_t*>(kBuffer);
// Test vectors for verifying Covers, GetData, and Subrange.
const struct {
bool valid;
size_t offset;
size_t length;
} kSubranges[] = {
{ true, 0, 0 },
{ true, 0, 2 },
{ true, 0, kBufferSize },
{ true, 2, 0 },
{ true, 2, 4 },
{ true, 2, kBufferSize - 2 },
{ true, kBufferSize - 1, 1 },
{ false, kBufferSize, 0 },
{ false, kBufferSize, static_cast<size_t>(-1) },
{ false, kBufferSize + 1, 0 },
{ false, static_cast<size_t>(-1), 2 },
{ false, 1, kBufferSize },
{ false, kBufferSize - 1, 2 },
{ false, 0, static_cast<size_t>(-1) },
{ false, 1, static_cast<size_t>(-1) },
};
const size_t kNumSubranges = sizeof(kSubranges) / sizeof(kSubranges[0]);
// Test vectors for verifying GetArrayElement.
const struct {
size_t offset;
size_t size;
size_t index;
const void* const pointer;
} kElements[] = {
// Valid array elemenets
{ 0, 1, 0, kBufferPointer },
{ 0, 1, 1, kBufferPointer + 1 },
{ 0, 1, kBufferSize - 1, kBufferPointer + kBufferSize - 1 },
{ 0, 2, 1, kBufferPointer + 2 },
{ 0, 4, 2, kBufferPointer + 8 },
{ 0, 4, 9, kBufferPointer + 36 },
{ kBufferSize - 1, 1, 0, kBufferPointer + kBufferSize - 1 },
// Invalid array elemenets
{ 0, 1, kBufferSize, NULL },
{ 0, 4, 10, NULL },
{ kBufferSize - 1, 1, 1, NULL },
{ kBufferSize - 1, 2, 0, NULL },
{ kBufferSize, 1, 0, NULL },
};
const size_t kNumElements = sizeof(kElements) / sizeof(kElements[0]);
} // namespace
TEST(MemoryRangeTest, DefaultConstructor) {
MemoryRange range;
EXPECT_EQ(NULL, range.data());
EXPECT_EQ(0U, range.length());
}
TEST(MemoryRangeTest, ConstructorWithDataAndLength) {
MemoryRange range(kBuffer, kBufferSize);
EXPECT_EQ(kBufferPointer, range.data());
EXPECT_EQ(kBufferSize, range.length());
}
TEST(MemoryRangeTest, Reset) {
MemoryRange range;
range.Reset();
EXPECT_EQ(NULL, range.data());
EXPECT_EQ(0U, range.length());
range.Set(kBuffer, kBufferSize);
EXPECT_EQ(kBufferPointer, range.data());
EXPECT_EQ(kBufferSize, range.length());
range.Reset();
EXPECT_EQ(NULL, range.data());
EXPECT_EQ(0U, range.length());
}
TEST(MemoryRangeTest, Set) {
MemoryRange range;
range.Set(kBuffer, kBufferSize);
EXPECT_EQ(kBufferPointer, range.data());
EXPECT_EQ(kBufferSize, range.length());
range.Set(NULL, 0);
EXPECT_EQ(NULL, range.data());
EXPECT_EQ(0U, range.length());
}
TEST(MemoryRangeTest, SubrangeOfEmptyMemoryRange) {
MemoryRange range;
MemoryRange subrange = range.Subrange(0, 10);
EXPECT_EQ(NULL, subrange.data());
EXPECT_EQ(0U, subrange.length());
}
TEST(MemoryRangeTest, SubrangeAndGetData) {
MemoryRange range(kBuffer, kBufferSize);
for (size_t i = 0; i < kNumSubranges; ++i) {
bool valid = kSubranges[i].valid;
size_t sub_offset = kSubranges[i].offset;
size_t sub_length = kSubranges[i].length;
SCOPED_TRACE(Message() << "offset=" << sub_offset
<< ", length=" << sub_length);
MemoryRange subrange = range.Subrange(sub_offset, sub_length);
if (valid) {
EXPECT_TRUE(range.Covers(sub_offset, sub_length));
EXPECT_EQ(kBufferPointer + sub_offset,
range.GetData(sub_offset, sub_length));
EXPECT_EQ(kBufferPointer + sub_offset, subrange.data());
EXPECT_EQ(sub_length, subrange.length());
} else {
EXPECT_FALSE(range.Covers(sub_offset, sub_length));
EXPECT_EQ(NULL, range.GetData(sub_offset, sub_length));
EXPECT_EQ(NULL, subrange.data());
EXPECT_EQ(0U, subrange.length());
}
}
}
TEST(MemoryRangeTest, GetDataWithTemplateType) {
MemoryRange range(kBuffer, kBufferSize);
const char* char_pointer = range.GetData<char>(0);
EXPECT_EQ(reinterpret_cast<const char*>(kBufferPointer), char_pointer);
const int* int_pointer = range.GetData<int>(0);
EXPECT_EQ(reinterpret_cast<const int*>(kBufferPointer), int_pointer);
}
TEST(MemoryRangeTest, GetArrayElement) {
MemoryRange range(kBuffer, kBufferSize);
for (size_t i = 0; i < kNumElements; ++i) {
size_t element_offset = kElements[i].offset;
size_t element_size = kElements[i].size;
unsigned element_index = kElements[i].index;
const void* const element_pointer = kElements[i].pointer;
SCOPED_TRACE(Message() << "offset=" << element_offset
<< ", size=" << element_size
<< ", index=" << element_index);
EXPECT_EQ(element_pointer, range.GetArrayElement(
element_offset, element_size, element_index));
}
}
TEST(MemoryRangeTest, GetArrayElmentWithTemplateType) {
MemoryRange range(kBuffer, kBufferSize);
const char* char_pointer = range.GetArrayElement<char>(0, 0);
EXPECT_EQ(reinterpret_cast<const char*>(kBufferPointer), char_pointer);
const int* int_pointer = range.GetArrayElement<int>(0, 0);
EXPECT_EQ(reinterpret_cast<const int*>(kBufferPointer), int_pointer);
}
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