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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "courgette/assembly_program.h"
#include "courgette/courgette.h"
#include "courgette/encoded_program.h"
#include "courgette/image_utils.h"
#include "courgette/streams.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace courgette {
namespace {
class AdjustmentMethodTest : public testing::Test {
public:
void Test1() const;
private:
void SetUp() {
}
void TearDown() {
}
// Returns one of two similar simple programs. These differ only in Label
// assignment, so it is possible to make them look identical.
std::unique_ptr<AssemblyProgram> MakeProgram(int kind) const {
auto prog = std::make_unique<AssemblyProgram>(EXE_WIN_32_X86, 0x00400000);
RVA kRvaA = 0x00410000;
RVA kRvaB = 0x00410004;
std::vector<RVA> abs32_rvas;
abs32_rvas.push_back(kRvaA);
abs32_rvas.push_back(kRvaB);
std::vector<RVA> rel32_rvas; // Stub.
TrivialRvaVisitor abs32_visitor(abs32_rvas);
TrivialRvaVisitor rel32_visitor(rel32_rvas);
prog->PrecomputeLabels(&abs32_visitor, &rel32_visitor);
Label* labelA = prog->FindAbs32Label(kRvaA);
Label* labelB = prog->FindAbs32Label(kRvaB);
InstructionGenerator gen = base::BindRepeating(
[](Label* labelA, Label* labelB,
InstructionReceptor* receptor) -> CheckBool {
EXPECT_TRUE(receptor->EmitAbs32(labelA));
EXPECT_TRUE(receptor->EmitAbs32(labelA));
EXPECT_TRUE(receptor->EmitAbs32(labelB));
EXPECT_TRUE(receptor->EmitAbs32(labelA));
EXPECT_TRUE(receptor->EmitAbs32(labelA));
EXPECT_TRUE(receptor->EmitAbs32(labelB));
return true;
},
labelA, labelB);
EXPECT_TRUE(prog->AnnotateLabels(gen));
EXPECT_EQ(6U, prog->abs32_label_annotations().size());
EXPECT_EQ(0U, prog->rel32_label_annotations().size());
if (kind == 0) {
labelA->index_ = 0;
labelB->index_ = 1;
} else {
labelA->index_ = 1;
labelB->index_ = 0;
}
prog->AssignRemainingIndexes();
return prog;
}
std::unique_ptr<AssemblyProgram> MakeProgramA() const {
return MakeProgram(0);
}
std::unique_ptr<AssemblyProgram> MakeProgramB() const {
return MakeProgram(1);
}
// Returns a string that is the serialized version of |program| annotations.
std::string Serialize(AssemblyProgram* program) const {
std::ostringstream oss;
for (const Label* label : program->abs32_label_annotations())
oss << "(" << label->rva_ << "," << label->index_ << ")";
oss << ";";
for (const Label* label : program->rel32_label_annotations())
oss << "(" << label->rva_ << "," << label->index_ << ")";
EXPECT_GT(oss.str().length(), 1U); // Ensure results are non-trivial.
return oss.str();
}
};
void AdjustmentMethodTest::Test1() const {
std::unique_ptr<AssemblyProgram> prog1 = MakeProgramA();
std::unique_ptr<AssemblyProgram> prog2 = MakeProgramB();
std::string s1 = Serialize(prog1.get());
std::string s2 = Serialize(prog2.get());
// Don't use EXPECT_EQ because strings are unprintable.
EXPECT_FALSE(s1 == s2); // Unadjusted A and B differ.
std::unique_ptr<AssemblyProgram> prog5 = MakeProgramA();
std::unique_ptr<AssemblyProgram> prog6 = MakeProgramB();
Status can_adjust = Adjust(*prog5, prog6.get());
EXPECT_EQ(C_OK, can_adjust);
std::string s5 = Serialize(prog5.get());
std::string s6 = Serialize(prog6.get());
EXPECT_TRUE(s1 == s5); // Adjustment did not change A (prog5)
EXPECT_TRUE(s5 == s6); // Adjustment did change B into A
}
TEST_F(AdjustmentMethodTest, All) {
Test1();
}
} // namespace
} // namespace courgette