394 lines
15 KiB
C++
394 lines
15 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include <cinttypes>
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#include <cstring>
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#include <functional>
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#include <catch.hpp>
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#include "common/bit_util.h"
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#include "common/common_types.h"
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#include "frontend/disassembler/disassembler.h"
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#include "interface/interface.h"
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#include "rand_int.h"
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#include "skyeye_interpreter/dyncom/arm_dyncom_interpreter.h"
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#include "skyeye_interpreter/skyeye_common/armstate.h"
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struct WriteRecord {
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size_t size;
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u32 address;
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u64 data;
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};
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static bool operator==(const WriteRecord& a, const WriteRecord& b) {
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return std::tie(a.size, a.address, a.data) == std::tie(b.size, b.address, b.data);
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}
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static std::array<u32, 3000> code_mem{};
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static std::vector<WriteRecord> write_records;
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static bool IsReadOnlyMemory(u32 vaddr);
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static u8 MemoryRead8(u32 vaddr);
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static u16 MemoryRead16(u32 vaddr);
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static u32 MemoryRead32(u32 vaddr);
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static u64 MemoryRead64(u32 vaddr);
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static void MemoryWrite8(u32 vaddr, u8 value);
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static void MemoryWrite16(u32 vaddr, u16 value);
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static void MemoryWrite32(u32 vaddr, u32 value);
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static void MemoryWrite64(u32 vaddr, u64 value);
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static void InterpreterFallback(u32 pc, Dynarmic::Jit* jit);
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static Dynarmic::UserCallbacks GetUserCallbacks();
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static bool IsReadOnlyMemory(u32 vaddr) {
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return vaddr < code_mem.size();
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}
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static u8 MemoryRead8(u32 vaddr) {
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return static_cast<u8>(vaddr);
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}
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static u16 MemoryRead16(u32 vaddr) {
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return static_cast<u16>(vaddr);
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}
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static u32 MemoryRead32(u32 vaddr) {
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if (vaddr < code_mem.size() * sizeof(u32)) {
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size_t index = vaddr / sizeof(u32);
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return code_mem[index];
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}
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return vaddr;
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}
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static u64 MemoryRead64(u32 vaddr) {
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return vaddr;
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}
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static void MemoryWrite8(u32 vaddr, u8 value){
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write_records.push_back({8, vaddr, value});
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}
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static void MemoryWrite16(u32 vaddr, u16 value){
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write_records.push_back({16, vaddr, value});
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}
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static void MemoryWrite32(u32 vaddr, u32 value){
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write_records.push_back({32, vaddr, value});
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}
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static void MemoryWrite64(u32 vaddr, u64 value){
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write_records.push_back({64, vaddr, value});
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}
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static void InterpreterFallback(u32 pc, Dynarmic::Jit* jit) {
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ARMul_State interp_state{USER32MODE};
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interp_state.user_callbacks = GetUserCallbacks();
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interp_state.NumInstrsToExecute = 1;
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interp_state.Reg = jit->Regs();
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interp_state.Cpsr = jit->Cpsr();
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interp_state.Reg[15] = pc;
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InterpreterClearCache();
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InterpreterMainLoop(&interp_state);
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bool T = Dynarmic::Common::Bit<5>(interp_state.Cpsr);
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interp_state.Reg[15] &= T ? 0xFFFFFFFE : 0xFFFFFFFC;
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jit->Regs() = interp_state.Reg;
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jit->Cpsr() = interp_state.Cpsr;
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}
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static void Fail() {
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FAIL();
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}
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static Dynarmic::UserCallbacks GetUserCallbacks() {
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Dynarmic::UserCallbacks user_callbacks{};
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user_callbacks.InterpreterFallback = &InterpreterFallback;
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user_callbacks.CallSVC = (bool (*)(u32)) &Fail;
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user_callbacks.IsReadOnlyMemory = &IsReadOnlyMemory;
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user_callbacks.MemoryRead8 = &MemoryRead8;
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user_callbacks.MemoryRead16 = &MemoryRead16;
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user_callbacks.MemoryRead32 = &MemoryRead32;
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user_callbacks.MemoryRead64 = &MemoryRead64;
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user_callbacks.MemoryWrite8 = &MemoryWrite8;
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user_callbacks.MemoryWrite16 = &MemoryWrite16;
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user_callbacks.MemoryWrite32 = &MemoryWrite32;
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user_callbacks.MemoryWrite64 = &MemoryWrite64;
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return user_callbacks;
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}
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struct InstructionGenerator final {
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public:
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InstructionGenerator(const char* format, std::function<bool(u32)> is_valid = [](u32){ return true; }) : is_valid(is_valid) {
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REQUIRE(strlen(format) == 32);
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for (int i = 0; i < 32; i++) {
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const u32 bit = 1 << (31 - i);
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switch (format[i]) {
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case '0':
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mask |= bit;
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break;
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case '1':
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bits |= bit;
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mask |= bit;
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break;
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default:
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// Do nothing
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break;
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}
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}
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}
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u32 Generate() const {
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u32 inst;
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do {
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u32 random = RandInt<u32>(0, 0xFFFF);
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inst = bits | (random & ~mask);
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} while (!is_valid(inst));
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return inst;
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}
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u32 Bits() { return bits; }
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u32 Mask() { return mask; }
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private:
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u32 bits = 0;
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u32 mask = 0;
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std::function<bool(u32)> is_valid;
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};
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static bool DoesBehaviorMatch(const ARMul_State& interp, const Dynarmic::Jit& jit, const std::vector<WriteRecord>& interp_write_records, const std::vector<WriteRecord>& jit_write_records) {
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const auto interp_regs = interp.Reg;
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const auto jit_regs = jit.Regs();
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return std::equal(interp_regs.begin(), interp_regs.end(), jit_regs.begin(), jit_regs.end())
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&& interp.Cpsr == jit.Cpsr()
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&& interp_write_records == jit_write_records;
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}
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void FuzzJitArm(const size_t instruction_count, const size_t instructions_to_execute_count, const size_t run_count, const std::function<u32()> instruction_generator) {
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// Prepare memory
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code_mem.fill(0xEAFFFFFE); // b +#0
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// Prepare test subjects
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ARMul_State interp{USER32MODE};
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interp.user_callbacks = GetUserCallbacks();
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Dynarmic::Jit jit{GetUserCallbacks()};
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for (size_t run_number = 0; run_number < run_count; run_number++) {
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interp.instruction_cache.clear();
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InterpreterClearCache();
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jit.ClearCache(false);
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// Setup initial state
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std::array<u32, 16> initial_regs;
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std::generate_n(initial_regs.begin(), 15, []{ return RandInt<u32>(0, 0xFFFFFFFF); });
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initial_regs[15] = 0;
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interp.Cpsr = 0x000001D0;
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interp.Reg = initial_regs;
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jit.Cpsr() = 0x000001D0;
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jit.Regs() = initial_regs;
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std::generate_n(code_mem.begin(), instruction_count, instruction_generator);
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// Run interpreter
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write_records.clear();
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interp.NumInstrsToExecute = static_cast<unsigned>(instructions_to_execute_count);
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InterpreterMainLoop(&interp);
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auto interp_write_records = write_records;
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{
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bool T = Dynarmic::Common::Bit<5>(interp.Cpsr);
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interp.Reg[15] &= T ? 0xFFFFFFFE : 0xFFFFFFFC;
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}
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// Run jit
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write_records.clear();
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jit.Run(static_cast<unsigned>(instructions_to_execute_count));
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auto jit_write_records = write_records;
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// Compare
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if (!DoesBehaviorMatch(interp, jit, interp_write_records, jit_write_records)) {
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printf("Failed at execution number %zu\n", run_number);
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printf("\nInstruction Listing: \n");
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for (size_t i = 0; i < instruction_count; i++) {
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printf("%s\n", Dynarmic::Arm::DisassembleArm(code_mem[i]).c_str());
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}
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printf("\nInitial Register Listing: \n");
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for (int i = 0; i <= 15; i++) {
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printf("%4i: %08x\n", i, initial_regs[i]);
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}
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printf("\nFinal Register Listing: \n");
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printf(" interp jit\n");
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for (int i = 0; i <= 15; i++) {
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printf("%4i: %08x %08x %s\n", i, interp.Reg[i], jit.Regs()[i], interp.Reg[i] != jit.Regs()[i] ? "*" : "");
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}
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printf("CPSR: %08x %08x %s\n", interp.Cpsr, jit.Cpsr(), interp.Cpsr != jit.Cpsr() ? "*" : "");
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#ifdef _MSC_VER
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__debugbreak();
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#endif
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FAIL();
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}
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if (run_number % 10 == 0) printf("%zu\r", run_number);
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}
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}
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TEST_CASE("Fuzz ARM data processing instructions", "[JitX64]") {
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const std::array<InstructionGenerator, 16> imm_instructions = {
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{
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InstructionGenerator("cccc0010101Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010100Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010000Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0011110Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc00110111nnnn0000rrrrvvvvvvvv"),
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InstructionGenerator("cccc00110101nnnn0000rrrrvvvvvvvv"),
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InstructionGenerator("cccc0010001Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0011101S0000ddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0011111S0000ddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0011100Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010011Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010111Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010110Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc0010010Snnnnddddrrrrvvvvvvvv"),
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InstructionGenerator("cccc00110011nnnn0000rrrrvvvvvvvv"),
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InstructionGenerator("cccc00110001nnnn0000rrrrvvvvvvvv"),
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}
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};
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const std::array<InstructionGenerator, 16> reg_instructions = {
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{
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InstructionGenerator("cccc0000101Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000100Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000000Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0001110Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc00010111nnnn0000vvvvvrr0mmmm"),
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InstructionGenerator("cccc00010101nnnn0000vvvvvrr0mmmm"),
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InstructionGenerator("cccc0000001Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0001101S0000ddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0001111S0000ddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0001100Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000011Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000111Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000110Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc0000010Snnnnddddvvvvvrr0mmmm"),
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InstructionGenerator("cccc00010011nnnn0000vvvvvrr0mmmm"),
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InstructionGenerator("cccc00010001nnnn0000vvvvvrr0mmmm"),
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}
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};
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const std::array<InstructionGenerator, 16> rsr_instructions = {
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{
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InstructionGenerator("cccc0000101Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000100Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000000Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0001110Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc00010111nnnn0000ssss0rr1mmmm"),
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InstructionGenerator("cccc00010101nnnn0000ssss0rr1mmmm"),
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InstructionGenerator("cccc0000001Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0001101S0000ddddssss0rr1mmmm"),
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InstructionGenerator("cccc0001111S0000ddddssss0rr1mmmm"),
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InstructionGenerator("cccc0001100Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000011Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000111Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000110Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc0000010Snnnnddddssss0rr1mmmm"),
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InstructionGenerator("cccc00010011nnnn0000ssss0rr1mmmm"),
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InstructionGenerator("cccc00010001nnnn0000ssss0rr1mmmm"),
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}
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};
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auto instruction_select = [&](bool Rd_can_be_r15) -> auto {
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return [&, Rd_can_be_r15]() -> u32 {
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size_t instruction_set = RandInt<size_t>(0, 2);
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u32 cond = 0xE;
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// Have a one-in-twenty-five chance of actually having a cond.
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if (RandInt(1, 25) == 1) {
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cond = RandInt<u32>(0x0, 0xD);
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}
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u32 S = RandInt<u32>(0, 1);
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switch (instruction_set) {
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case 0: {
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InstructionGenerator instruction = imm_instructions[RandInt<size_t>(0, imm_instructions.size() - 1)];
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u32 Rd = RandInt<u32>(0, Rd_can_be_r15 ? 15 : 14);
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if (Rd == 15) S = false;
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u32 Rn = RandInt<u32>(0, 15);
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u32 shifter_operand = RandInt<u32>(0, 0xFFF);
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u32 assemble_randoms = (shifter_operand << 0) | (Rd << 12) | (Rn << 16) | (S << 20) | (cond << 28);
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return instruction.Bits() | (assemble_randoms & ~instruction.Mask());
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}
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case 1: {
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InstructionGenerator instruction = reg_instructions[RandInt<size_t>(0, reg_instructions.size() - 1)];
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u32 Rd = RandInt<u32>(0, Rd_can_be_r15 ? 15 : 14);
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if (Rd == 15) S = false;
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u32 Rn = RandInt<u32>(0, 15);
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u32 shifter_operand = RandInt<u32>(0, 0xFFF);
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u32 assemble_randoms =
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(shifter_operand << 0) | (Rd << 12) | (Rn << 16) | (S << 20) | (cond << 28);
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return instruction.Bits() | (assemble_randoms & ~instruction.Mask());
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}
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case 2: {
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InstructionGenerator instruction = rsr_instructions[RandInt<size_t>(0, rsr_instructions.size() - 1)];
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u32 Rd = RandInt<u32>(0, 14); // Rd can never be 15.
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u32 Rn = RandInt<u32>(0, 14);
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u32 Rs = RandInt<u32>(0, 14);
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int rotate = RandInt<int>(0, 3);
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u32 Rm = RandInt<u32>(0, 14);
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u32 assemble_randoms =
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(Rm << 0) | (rotate << 5) | (Rs << 8) | (Rd << 12) | (Rn << 16) | (S << 20) | (cond << 28);
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return instruction.Bits() | (assemble_randoms & ~instruction.Mask());
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}
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}
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return 0;
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};
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};
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SECTION("short blocks") {
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FuzzJitArm(5, 6, 10000, instruction_select(/*Rd_can_be_r15=*/false));
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}
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SECTION("long blocks") {
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FuzzJitArm(1024, 1025, 200, instruction_select(/*Rd_can_be_r15=*/false));
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}
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SECTION("R15") {
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FuzzJitArm(1, 1, 10000, instruction_select(/*Rd_can_be_r15=*/true));
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}
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}
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TEST_CASE("Fuzz ARM reversal instructions", "[JitX64]") {
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const auto is_valid = [](u32 instr) -> bool {
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// R15 is UNPREDICTABLE
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return Dynarmic::Common::Bits<0, 3>(instr) != 0b1111 && Dynarmic::Common::Bits<12, 15>(instr) != 0b1111;
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};
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const std::array<InstructionGenerator, 3> reg_instructions = {
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{
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InstructionGenerator("cccc011010111111dddd11110011mmmm", is_valid),
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InstructionGenerator("cccc011010111111dddd11111011mmmm", is_valid),
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InstructionGenerator("cccc011011111111dddd11111011mmmm", is_valid),
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}
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};
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SECTION("REV tests") {
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FuzzJitArm(1, 1, 10000, [®_instructions]() -> u32 {
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return reg_instructions[0].Generate();
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});
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}
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SECTION("REV16 tests") {
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FuzzJitArm(1, 1, 10000, [®_instructions]() -> u32 {
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return reg_instructions[1].Generate();
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});
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}
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SECTION("REVSH tests") {
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FuzzJitArm(1, 1, 10000, [®_instructions]() -> u32 {
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return reg_instructions[2].Generate();
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});
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}
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}
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