// Copyright 2018 the V8 project 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 "test/cctest/cctest.h" #include "src/assembler-inl.h" #include "src/handles-inl.h" #include "src/isolate.h" #include "src/macro-assembler-inl.h" #include "src/simulator.h" #include "src/snapshot/macros.h" #include "src/snapshot/snapshot.h" // To generate the binary files for the test function, enable this section and // run GenerateTestFunctionData once on each arch. #define GENERATE_TEST_FUNCTION_DATA false namespace v8 { namespace internal { namespace test_isolate_independent_builtins { #ifdef V8_EMBEDDED_BUILTINS UNINITIALIZED_TEST(VerifyBuiltinsIsolateIndependence) { FLAG_stress_off_heap_code = false; // Disable off-heap trampolines. v8::Isolate::CreateParams create_params; create_params.array_buffer_allocator = CcTest::array_buffer_allocator(); v8::Isolate* v8_isolate = v8::Isolate::New(create_params); { v8::Isolate::Scope isolate_scope(v8_isolate); v8::internal::Isolate* isolate = reinterpret_cast(v8_isolate); HandleScope handle_scope(isolate); Snapshot::EnsureAllBuiltinsAreDeserialized(isolate); // TODO(jgruber,v8:6666): Investigate CONST_POOL and VENEER_POOL kinds. // CONST_POOL is currently relevant on {arm,arm64,mips,mips64,ppc,s390}. // Rumors are it will also become relevant on x64. My // understanding is that we should be fine if we ensure it // doesn't contain heap constants and we use pc-relative // addressing. // VENEER_POOL is arm64-only. From what I've seen, jumps are pc-relative // and stay within the same code object and thus should be // isolate-independent. // Build a white-list of all isolate-independent RelocInfo entry kinds. constexpr int all_real_modes_mask = (1 << (RelocInfo::LAST_REAL_RELOC_MODE + 1)) - 1; constexpr int mode_mask = all_real_modes_mask & ~RelocInfo::ModeMask(RelocInfo::COMMENT) & ~RelocInfo::ModeMask(RelocInfo::INTERNAL_REFERENCE) & ~RelocInfo::ModeMask(RelocInfo::INTERNAL_REFERENCE_ENCODED) & ~RelocInfo::ModeMask(RelocInfo::CONST_POOL) & ~RelocInfo::ModeMask(RelocInfo::VENEER_POOL); STATIC_ASSERT(RelocInfo::LAST_REAL_RELOC_MODE == RelocInfo::VENEER_POOL); STATIC_ASSERT(RelocInfo::ModeMask(RelocInfo::COMMENT) == (1 << RelocInfo::COMMENT)); STATIC_ASSERT( mode_mask == (RelocInfo::ModeMask(RelocInfo::CODE_TARGET) | RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) | RelocInfo::ModeMask(RelocInfo::WASM_CONTEXT_REFERENCE) | RelocInfo::ModeMask(RelocInfo::WASM_FUNCTION_TABLE_SIZE_REFERENCE) | RelocInfo::ModeMask(RelocInfo::WASM_GLOBAL_HANDLE) | RelocInfo::ModeMask(RelocInfo::WASM_CALL) | RelocInfo::ModeMask(RelocInfo::JS_TO_WASM_CALL) | RelocInfo::ModeMask(RelocInfo::RUNTIME_ENTRY) | RelocInfo::ModeMask(RelocInfo::EXTERNAL_REFERENCE))); constexpr bool kVerbose = false; bool found_mismatch = false; for (int i = 0; i < Builtins::builtin_count; i++) { Code* code = isolate->builtins()->builtin(i); if (kVerbose) { printf("%s %s\n", Builtins::KindNameOf(i), isolate->builtins()->name(i)); } bool is_isolate_independent = true; for (RelocIterator it(code, mode_mask); !it.done(); it.next()) { is_isolate_independent = false; #ifdef ENABLE_DISASSEMBLER if (kVerbose) { RelocInfo::Mode mode = it.rinfo()->rmode(); printf(" %s\n", RelocInfo::RelocModeName(mode)); } #endif } // Relaxed condition only checks whether the isolate-independent list is // valid, not whether it is complete. This is to avoid constant work // updating the list. bool should_be_isolate_independent = Builtins::IsIsolateIndependent(i); if (should_be_isolate_independent && !is_isolate_independent) { found_mismatch = true; printf("%s %s expected: %d, is: %d\n", Builtins::KindNameOf(i), isolate->builtins()->name(i), should_be_isolate_independent, is_isolate_independent); } } CHECK(!found_mismatch); } v8_isolate->Dispose(); } // V8_CC_MSVC is true for both MSVC and clang on windows. clang can handle // __asm__-style inline assembly but MSVC cannot, and thus we need a more // precise compiler detection that can distinguish between the two. clang on // windows sets both __clang__ and _MSC_VER, MSVC sets only _MSC_VER. #if defined(_MSC_VER) && !defined(__clang__) #define V8_COMPILER_IS_MSVC #endif #ifndef V8_COMPILER_IS_MSVC #if GENERATE_TEST_FUNCTION_DATA // Arch-specific defines. #if V8_TARGET_ARCH_IA32 #define TEST_FUNCTION_FILE "f-ia32.bin" #elif V8_TARGET_ARCH_X64 && _WIN64 #define TEST_FUNCTION_FILE "f-x64-win.bin" #elif V8_TARGET_ARCH_X64 #define TEST_FUNCTION_FILE "f-x64.bin" #elif V8_TARGET_ARCH_ARM64 #define TEST_FUNCTION_FILE "f-arm64.bin" #elif V8_TARGET_ARCH_ARM #define TEST_FUNCTION_FILE "f-arm.bin" #elif V8_TARGET_ARCH_PPC #define TEST_FUNCTION_FILE "f-ppc.bin" #elif V8_TARGET_ARCH_MIPS #define TEST_FUNCTION_FILE "f-mips.bin" #elif V8_TARGET_ARCH_MIPS64 #define TEST_FUNCTION_FILE "f-mips64.bin" #elif V8_TARGET_ARCH_S390 #define TEST_FUNCTION_FILE "f-s390.bin" #else #error "Unknown architecture." #endif #define __ masm. TEST(GenerateTestFunctionData) { CcTest::InitializeVM(); Isolate* isolate = CcTest::i_isolate(); HandleScope scope(isolate); #if V8_TARGET_ARCH_IA32 v8::internal::byte buffer[256]; Assembler masm(isolate, buffer, sizeof(buffer)); __ mov(eax, Operand(esp, 4)); __ add(eax, Operand(esp, 8)); __ ret(0); #elif V8_TARGET_ARCH_X64 size_t allocated; byte* buffer = AllocateAssemblerBuffer(&allocated); Assembler masm(isolate, buffer, static_cast(allocated)); #ifdef _WIN64 static const Register arg1 = rcx; static const Register arg2 = rdx; #else static const Register arg1 = rdi; static const Register arg2 = rsi; #endif __ movq(rax, arg2); __ addq(rax, arg1); __ ret(0); #elif V8_TARGET_ARCH_ARM64 MacroAssembler masm(isolate, nullptr, 0, v8::internal::CodeObjectRequired::kYes); __ Add(x0, x0, x1); __ Ret(); #elif V8_TARGET_ARCH_ARM Assembler masm(isolate, nullptr, 0); __ add(r0, r0, Operand(r1)); __ mov(pc, Operand(lr)); #elif V8_TARGET_ARCH_PPC Assembler masm(isolate, nullptr, 0); __ function_descriptor(); __ add(r3, r3, r4); __ blr(); #elif V8_TARGET_ARCH_MIPS MacroAssembler masm(isolate, nullptr, 0, v8::internal::CodeObjectRequired::kYes); __ addu(v0, a0, a1); __ jr(ra); __ nop(); #elif V8_TARGET_ARCH_MIPS64 MacroAssembler masm(isolate, nullptr, 0, v8::internal::CodeObjectRequired::kYes); __ addu(v0, a0, a1); __ jr(ra); __ nop(); #elif V8_TARGET_ARCH_S390 Assembler masm(isolate, nullptr, 0); __ agr(r2, r3); __ b(r14); #else // Unknown architecture. #error "Unknown architecture." #endif // Target architecture. CodeDesc desc; masm.GetCode(isolate, &desc); std::ofstream of(TEST_FUNCTION_FILE, std::ios::out | std::ios::binary); of.write(reinterpret_cast(desc.buffer), desc.instr_size); } #undef __ #endif // GENERATE_TEST_FUNCTION_DATA #if V8_TARGET_ARCH_IA32 #define FUNCTION_BYTES \ ".byte 0x8b, 0x44, 0x24, 0x04, 0x03, 0x44, 0x24, 0x08, 0xc3\n" #elif V8_TARGET_ARCH_X64 && _WIN64 #define FUNCTION_BYTES ".byte 0x48, 0x8b, 0xc2, 0x48, 0x03, 0xc1, 0xc3\n" #elif V8_TARGET_ARCH_X64 #define FUNCTION_BYTES ".byte 0x48, 0x8b, 0xc6, 0x48, 0x03, 0xc7, 0xc3\n" #elif V8_TARGET_ARCH_ARM64 #define FUNCTION_BYTES ".byte 0x00, 0x00, 0x01, 0x8b, 0xc0, 0x03, 0x5f, 0xd6\n" #elif V8_TARGET_ARCH_ARM #define FUNCTION_BYTES ".byte 0x01, 0x00, 0x80, 0xe0, 0x0e, 0xf0, 0xa0, 0xe1\n" #elif V8_TARGET_ARCH_PPC #define FUNCTION_BYTES ".byte 0x14, 0x22, 0x63, 0x7c, 0x20, 0x00, 0x80, 0x4e\n" #elif V8_TARGET_ARCH_MIPS #define FUNCTION_BYTES \ ".byte 0x21, 0x10, 0x85, 0x00, 0x08, 0x00, 0xe0, " \ "0x03, 0x00, 0x00, 0x00, 0x00\n" #elif V8_TARGET_ARCH_MIPS64 #define FUNCTION_BYTES \ ".byte 0x21, 0x10, 0x85, 0x00, 0x08, 0x00, 0xe0, " \ "0x03, 0x00, 0x00, 0x00, 0x00\n" #elif V8_TARGET_ARCH_S390 #define FUNCTION_BYTES \ ".byte 0xb9, 0x08, 0x00, 0x23, 0x07, 0xfe\n" #else #error "Unknown architecture." #endif V8_EMBEDDED_RODATA_HEADER(test_string0_bytes) __asm__(".byte 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37\n" ".byte 0x38, 0x39, 0x0a, 0x00\n"); extern "C" V8_ALIGNED(16) const char test_string0_bytes[]; V8_EMBEDDED_TEXT_HEADER(test_function0_bytes) __asm__(FUNCTION_BYTES); extern "C" V8_ALIGNED(16) const char test_function0_bytes[]; // clang-format on // A historical note: We use .byte over .incbin since the latter leads to // complications involving generation of build-time dependencies. Goma parses // #include statements, and clang has -MD/-MMD. Neither recognize .incbin. TEST(ByteInRodata) { CHECK_EQ(0, std::strcmp("0123456789\n", test_string0_bytes)); } TEST(ByteInText) { CcTest::InitializeVM(); Isolate* isolate = CcTest::i_isolate(); auto f = GeneratedCode::FromAddress( isolate, const_cast(test_function0_bytes)); CHECK_EQ(7, f.Call(3, 4)); CHECK_EQ(11, f.Call(5, 6)); } #endif // #ifndef V8_COMPILER_IS_MSVC #undef V8_COMPILER_IS_MSVC #endif // V8_EMBEDDED_BUILTINS #undef FUNCTION_BYTES #undef GENERATE_TEST_FUNCTION_DATA #undef TEST_FUNCTION_FILE } // namespace test_isolate_independent_builtins } // namespace internal } // namespace v8