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// 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.
#include "courgette/encoded_program.h"
#include <stddef.h>
#include <stdint.h>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "courgette/disassembler.h"
#include "courgette/streams.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
using courgette::EncodedProgram;
struct AddressSpec {
int32_t index;
courgette::RVA rva;
};
// Creates a simple new program with given addresses. The orders of elements
// in |abs32_specs| and |rel32_specs| are important.
scoped_ptr<EncodedProgram> CreateTestProgram(AddressSpec* abs32_specs,
size_t num_abs32_specs,
AddressSpec* rel32_specs,
size_t num_rel32_specs) {
scoped_ptr<EncodedProgram> program(new EncodedProgram());
uint32_t base = 0x00900000;
program->set_image_base(base);
for (size_t i = 0; i < num_abs32_specs; ++i) {
EXPECT_TRUE(program->DefineAbs32Label(abs32_specs[i].index,
abs32_specs[i].rva));
}
for (size_t i = 0; i < num_rel32_specs; ++i) {
EXPECT_TRUE(program->DefineRel32Label(rel32_specs[i].index,
rel32_specs[i].rva));
}
program->EndLabels();
EXPECT_TRUE(program->AddOrigin(0)); // Start at base.
for (size_t i = 0; i < num_abs32_specs; ++i)
EXPECT_TRUE(program->AddAbs32(abs32_specs[i].index));
for (size_t i = 0; i < num_rel32_specs; ++i)
EXPECT_TRUE(program->AddRel32(rel32_specs[i].index));
return program;
}
bool CompareSink(const uint8_t expected[],
size_t num_expected,
courgette::SinkStream* ss) {
size_t n = ss->Length();
if (num_expected != n)
return false;
const uint8_t* buffer = ss->Buffer();
return memcmp(&expected[0], buffer, n) == 0;
}
} // namespace
// Create a simple program with a few addresses and references and
// check that the bits produced are as expected.
TEST(EncodedProgramTest, Test) {
// ABS32 index 7 == base + 4.
AddressSpec abs32_specs[] = {{7, 4}};
// REL32 index 5 == base + 0.
AddressSpec rel32_specs[] = {{5, 0}};
scoped_ptr<EncodedProgram> program(
CreateTestProgram(abs32_specs, arraysize(abs32_specs),
rel32_specs, arraysize(rel32_specs)));
// Serialize and deserialize.
courgette::SinkStreamSet sinks;
EXPECT_TRUE(program->WriteTo(&sinks));
program.reset();
courgette::SinkStream sink;
bool can_collect = sinks.CopyTo(&sink);
EXPECT_TRUE(can_collect);
const void* buffer = sink.Buffer();
size_t length = sink.Length();
courgette::SourceStreamSet sources;
bool can_get_source_streams = sources.Init(buffer, length);
EXPECT_TRUE(can_get_source_streams);
scoped_ptr<EncodedProgram> encoded2(new EncodedProgram());
bool can_read = encoded2->ReadFrom(&sources);
EXPECT_TRUE(can_read);
// Finally, try to assemble.
courgette::SinkStream assembled;
bool can_assemble = encoded2->AssembleTo(&assembled);
EXPECT_TRUE(can_assemble);
encoded2.reset();
const uint8_t golden[] = {
0x04, 0x00, 0x90,
0x00, // ABS32 to base + 4
0xF8, 0xFF, 0xFF,
0xFF // REL32 from next line to base + 2
};
EXPECT_TRUE(CompareSink(golden, arraysize(golden), &assembled));
}
// A larger test with multiple addresses. We encode the program and check the
// contents of the address streams.
TEST(EncodedProgramTest, TestWriteAddress) {
// Absolute addresses by index: [_, _, _, 2, _, 23, _, 11].
AddressSpec abs32_specs[] = {{7, 11}, {3, 2}, {5, 23}};
// Relative addresses by index: [16, 7, _, 32].
AddressSpec rel32_specs[] = {{0, 16}, {3, 32}, {1, 7}};
scoped_ptr<EncodedProgram> program(
CreateTestProgram(abs32_specs, arraysize(abs32_specs),
rel32_specs, arraysize(rel32_specs)));
courgette::SinkStreamSet sinks;
EXPECT_TRUE(program->WriteTo(&sinks));
program.reset();
// Check addresses in sinks.
const uint8_t golden_abs32_indexes[] = {
0x03, 0x07, 0x03, 0x05 // 3 indexes: [7, 3, 5].
};
EXPECT_TRUE(CompareSink(golden_abs32_indexes,
arraysize(golden_abs32_indexes),
sinks.stream(courgette::kStreamAbs32Indexes)));
const uint8_t golden_rel32_indexes[] = {
0x03, 0x00, 0x03, 0x01 // 3 indexes: [0, 3, 1].
};
EXPECT_TRUE(CompareSink(golden_rel32_indexes,
arraysize(golden_rel32_indexes),
sinks.stream(courgette::kStreamRel32Indexes)));
// Addresses: [_, _, _, 2, _, 23, _, 11].
// Padded: [0, 0, 0, 2, 2, 23, 23, 11].
// Delta: [0, 0, 0, 2, 0, 21, 0, -12].
// Hex: [0, 0, 0, 0x02, 0, 0x15, 0, 0xFFFFFFF4].
// Complement neg: [0, 0, 0, 0x02, 0, 0x15, 0, (0x0B)].
// Varint32 Signed: [0, 0, 0, 0x04, 0, 0x2A, 0, 0x17].
const uint8_t golden_abs32_addresses[] = {
0x08, // 8 address deltas.
0x00, 0x00, 0x00, 0x04, 0x00, 0x2A, 0x00, 0x17,
};
EXPECT_TRUE(CompareSink(golden_abs32_addresses,
arraysize(golden_abs32_addresses),
sinks.stream(courgette::kStreamAbs32Addresses)));
// Addresses: [16, 7, _, 32].
// Padded: [16, 7, 7, 32].
// Delta: [16, -9, 0, 25].
// Hex: [0x10, 0xFFFFFFF7, 0, 0x19].
// Complement Neg: [0x10, (0x08), 0, 0x19].
// Varint32 Signed: [0x20, 0x11, 0, 0x32].
const uint8_t golden_rel32_addresses[] = {
0x04, // 4 address deltas.
0x20, 0x11, 0x00, 0x32,
};
EXPECT_TRUE(CompareSink(golden_rel32_addresses,
arraysize(golden_rel32_addresses),
sinks.stream(courgette::kStreamRel32Addresses)));
}
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