WebKit/Source/JavaScriptCore/llint/LLIntData.cpp at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. 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.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.

#include "config.h"

#include "LLIntData.h"

#include "InPlaceInterpreter.h"

#include "JSCConfig.h"

#include "LLIntCLoop.h"

#include "LLIntEntrypoint.h"

#include "LLIntSlowPaths.h"

#include "LLIntThunks.h"

#include "Opcode.h"

#if PLATFORM(COCOA)

#include <wtf/ResourceUsage.h>

#include <wtf/cocoa/Entitlements.h>

#endif

WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN

namespace JSC {

namespace LLInt {

#if !HAVE(OS_SCRIPT_CONFIG_SPI)

#if COMPILER(CLANG)

// The purpose of applying this attribute is to move the os_script_config_storage away from other

// global variables, and allow the linker to pack them in more efficiently. Without this, the

// linker currently leaves multiple KBs of unused padding before this page though there are many

// other variables that come afterwards that would have fit in there. Adding this attribute was

// shown to resolve a memory regression on our small memory footprint benchmark.

#define LLINT_OPCODE_CONFIG_SECTION __attribute__((used, section("__DATA,__jsc_opcodes")))

#else

#define LLINT_OPCODE_CONFIG_SECTION

#endif

alignas(CeilingOnPageSize) uint8_t LLINT_OPCODE_CONFIG_SECTION os_script_config_storage[OpcodeConfigSizeToProtect];

#endif

static_assert(sizeof(OpcodeConfig) <= OpcodeConfigSizeToProtect);

#if !ENABLE(C_LOOP)

extern "C" void SYSV_ABI llint_entry(void*, void*, void*);

#endif // !ENABLE(C_LOOP)

#if CPU(ARM64E)

extern "C" void vmEntryToJavaScriptTrampoline(void);

extern "C" void tailCallJSEntryTrampoline(void);

extern "C" void tailCallJSEntrySlowPathTrampoline(void);

extern "C" void tailCallWithoutUntagJSEntryTrampoline(void);

extern "C" void wasmTailCallTrampoline(void);

extern "C" void exceptionHandlerTrampoline(void);

extern "C" void returnFromLLIntTrampoline(void);

#if ENABLE(WEBASSEMBLY)

extern "C" void relocate_jit_return_pc_return_location(void);

extern "C" void relocate_jit_return_pc_trampoline(void);

extern "C" void exit_implanted_slice(void);

extern "C" void get_sentinel_frame_return_pc_return_location(void);

extern "C" void get_sentinel_frame_return_pc_trampoline(void);

extern "C" void wasm_restore_frame_return(void);

JSC_ANNOTATE_JIT_OPERATION_RETURN(relocate_jit_return_pc_return_location);

JSC_ANNOTATE_JIT_OPERATION_RETURN(exit_implanted_slice);

JSC_ANNOTATE_JIT_OPERATION_RETURN(get_sentinel_frame_return_pc_return_location);

#endif // ENABLE(WEBASSEMBLY)

#endif // CPU(ARM64E)

#if ENABLE(CSS_SELECTOR_JIT) && CPU(ARM64E) && !ENABLE(C_LOOP)

extern "C" void SYSV_ABI vmEntryToCSSJITAfter(void);

JSC_ANNOTATE_JIT_OPERATION_RETURN(vmEntryToCSSJITAfter);

#endif

#if PLATFORM(COCOA)

static bool scriptingIsForbidden()

{

return processHasEntitlement("com.apple.security.script-restrictions"_s);

}

#else

static constexpr bool scriptingIsForbidden() { return false; }

#endif

void initialize()

{

#if HAVE(OS_SCRIPT_CONFIG_SPI)

// This check is provided only as a convenience best effort at helping identify when there

// is a potential SDK vs OS mismatch. The check is intentionally designed to be cheap.

auto osVersionSupports = [] (void* storageAddress) {

auto addressValue = reinterpret_cast<uintptr_t>(storageAddress);

uintptr_t pageSizeMask = vmPageSize() - 1;

if (addressValue & pageSizeMask)

return false; // os_script_config_storage should be page aligned.

#if CPU(ADDRESS64)

uintptr_t fourGigabyteBoundary = 4 * GB;

if (addressValue < fourGigabyteBoundary)

return false; // os_script_config_storage would not be positioned under 4G on a 64 bit system.

#endif

// We didn't detect an issue. So, maybe it's OK? Regardless, WTF::makePagesFreezable() will

// fail if the address is not valid.

return true;

};

// If this RELEASE_ASSERT fails, it's because you've built locally against a newer SDK

// that has the os_script_config_storage SPI, but are running on an older OS that does

// not implement the SPI. To work around this for your local build, force the #define

// of HAVE_OS_SCRIPT_CONFIG_SPI in LLIntData.h to 0.

RELEASE_ASSERT(osVersionSupports(os_script_config_storage));

#endif

WTF::makePagesFreezable(&os_script_config_storage, OpcodeConfigSizeToProtect);

if (g_jscConfig.vmEntryDisallowed || scriptingIsForbidden()) [[unlikely]] {

// FIXME: Check if we can do this in a more performant way. See rdar://158509720.

g_jscConfig.vmEntryDisallowed = true;

WTF::permanentlyFreezePages(&os_script_config_storage, OpcodeConfigSizeToProtect, WTF::FreezePagePermission::None);

return;

}

WTF::compilerFence();

#if ENABLE(C_LOOP)

CLoop::initialize();

#else // !ENABLE(C_LOOP)

static_assert(numOpcodeIDs >= 256, "nextInstruction() relies on this for bounding the dispatch");

#if CPU(ARM64E)

RELEASE_ASSERT(!g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::vmEntryToJavaScript)]);

JSC::Opcode tempOpcodeMap[numOpcodeIDs];

JSC::Opcode tempOpcodeMapWide16[numOpcodeIDs];

JSC::Opcode tempOpcodeMapWide32[numOpcodeIDs];

JSC::Opcode* opcodeMap = tempOpcodeMap;

JSC::Opcode* opcodeMapWide16 = tempOpcodeMapWide16;

JSC::Opcode* opcodeMapWide32 = tempOpcodeMapWide32;

#else

JSC::Opcode* opcodeMap = g_opcodeMap;

JSC::Opcode* opcodeMapWide16 = g_opcodeMapWide16;

JSC::Opcode* opcodeMapWide32 = g_opcodeMapWide32;

#endif

// Step 1: fill in opcodeMaps.

llint_entry(opcodeMap, opcodeMapWide16, opcodeMapWide32);

#if ENABLE(WEBASSEMBLY)

if (Options::useWasm())

IPInt::initialize();

#endif

#if CPU(ARM64E)

for (size_t i = 0; i < numOpcodeIDs; ++i) {

g_opcodeMap[i] = removeCodePtrTag(opcodeMap[i]);

g_opcodeMapWide16[i] = removeCodePtrTag(opcodeMapWide16[i]);

g_opcodeMapWide32[i] = removeCodePtrTag(opcodeMapWide32[i]);

}

#endif

// Step 2: freeze opcodeMaps.

WTF::compilerFence();

WTF::permanentlyFreezePages(&os_script_config_storage, OpcodeConfigSizeToProtect, WTF::FreezePagePermission::ReadOnly);

WTF::compilerFence();

// Step 3: verify that the opcodeMap is expected after freezing.

#if CPU(ARM64E)

for (size_t i = 0; i < numOpcodeIDs; ++i) {

uintptr_t tag = (static_cast<uintptr_t>(BytecodePtrTag) << 48) | std::bit_cast<uintptr_t>(&opcodeMap[i]);

uintptr_t tag16 = (static_cast<uintptr_t>(BytecodePtrTag) << 48) | std::bit_cast<uintptr_t>(&opcodeMapWide16[i]);

uintptr_t tag32 = (static_cast<uintptr_t>(BytecodePtrTag) << 48) | std::bit_cast<uintptr_t>(&opcodeMapWide32[i]);

RELEASE_ASSERT(g_opcodeMap[i] == __builtin_ptrauth_auth(opcodeMap[i], ptrauth_key_process_dependent_code, tag));

RELEASE_ASSERT(g_opcodeMapWide16[i] == __builtin_ptrauth_auth(opcodeMapWide16[i], ptrauth_key_process_dependent_code, tag16));

RELEASE_ASSERT(g_opcodeMapWide32[i] == __builtin_ptrauth_auth(opcodeMapWide32[i], ptrauth_key_process_dependent_code, tag32));

}

#endif

#if ENABLE(WEBASSEMBLY)

if (Options::useWasm())

IPInt::verifyInitialization();

#endif

static_assert(llint_throw_from_slow_path_trampoline < UINT8_MAX);

static_assert(maxBytecodeStructLength + 1 <= Config::exceptionInstructionsSize);

for (unsigned i = 0; i < maxBytecodeStructLength + 1; ++i)

g_jscConfig.llint.exceptionInstructions[i] = llint_throw_from_slow_path_trampoline;

JITOperationList::populatePointersInJavaScriptCoreForLLInt();

#if CPU(ARM64E)

#if ENABLE(JIT_CAGE)

if (Options::useJITCage()) {

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::jitCagePtr)] = jitCagePtrThunk().code().taggedPtr();

JSC_JIT_CAGE_PROBE(removeCodePtrTag<void*>(jitCageProbeThunk().code().taggedPtr()));

}

#endif

#if ENABLE(JIT)

#define INITIALIZE_JS_GATE_JIT_PATH(name, tag) \

if (Options::useJIT()) { \

codeRef8.construct(createJSGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name)); \

codeRef16.construct(createJSGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getWide16CodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name "_wide16")); \

codeRef32.construct(createJSGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getWide32CodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name "_wide32")); \

} else

#else

#define INITIALIZE_JS_GATE_JIT_PATH(name, tag)

#endif

#define INITIALIZE_JS_GATE(name, tag) \

do { \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef8; \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef16; \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef32; \

INITIALIZE_JS_GATE_JIT_PATH(name, tag) { \

codeRef8.construct(LLInt::getCodeRef<NativeToJITGatePtrTag>(js_trampoline_##name)); \

codeRef16.construct(LLInt::getWide16CodeRef<NativeToJITGatePtrTag>(js_trampoline_##name)); \

codeRef32.construct(LLInt::getWide32CodeRef<NativeToJITGatePtrTag>(js_trampoline_##name)); \

} \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name)] = codeRef8.get().code().taggedPtr(); \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##_wide16)] = codeRef16.get().code().taggedPtr(); \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##_wide32)] = codeRef32.get().code().taggedPtr(); \

} while (0);

JSC_JS_GATE_OPCODES(INITIALIZE_JS_GATE)

#if ENABLE(WEBASSEMBLY)

#if ENABLE(JIT)

#define INITIALIZE_WASM_GATE_JIT_PATH(name, tag) \

if (Options::useJIT()) { \

codeRef8.construct(createWasmGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getCodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name)); \

codeRef16.construct(createWasmGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getWide16CodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name "_wide16")); \

codeRef32.construct(createWasmGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(LLInt::getWide32CodeFunctionPtr<CFunctionPtrTag>(name##_return_location)), tag, #name "_wide32")); \

} else

#else

#define INITIALIZE_WASM_GATE_JIT_PATH(name, tag)

#endif

#define INITIALIZE_WASM_GATE(name, tag) \

do { \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef8; \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef16; \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef32; \

INITIALIZE_WASM_GATE_JIT_PATH(name, tag) { \

codeRef8.construct(LLInt::getCodeRef<NativeToJITGatePtrTag>(wasm_trampoline_##name)); \

codeRef16.construct(LLInt::getWide16CodeRef<NativeToJITGatePtrTag>(wasm_trampoline_##name)); \

codeRef32.construct(LLInt::getWide32CodeRef<NativeToJITGatePtrTag>(wasm_trampoline_##name)); \

} \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name)] = codeRef8.get().code().taggedPtr(); \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##_wide16)] = codeRef16.get().code().taggedPtr(); \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##_wide32)] = codeRef32.get().code().taggedPtr(); \

} while (0);

JSC_WASM_GATE_OPCODES(INITIALIZE_WASM_GATE)

#endif // ENABLE(WEBASSEMBLY)

// Step 4: Initialize g_jscConfig.llint.gateMap[Gate::vmEntryToJavaScript].

// This is key to entering the interpreter.

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<VMEntryToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT()) {

auto gateCodeRef = createJSGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(&vmEntryToJavaScriptGateAfter), JSEntryPtrTag, "vmEntryToJavaScript");

codeRef.construct(gateCodeRef.retagged<VMEntryToJITGatePtrTag>());

} else

#endif

codeRef.construct(MacroAssemblerCodeRef<VMEntryToJITGatePtrTag>::createSelfManagedCodeRef(CodePtr<VMEntryToJITGatePtrTag>::fromTaggedPtr(retagCodePtr<void*, CFunctionPtrTag, VMEntryToJITGatePtrTag>(&vmEntryToJavaScriptTrampoline))));

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::vmEntryToJavaScript)] = codeRef.get().code().taggedPtr();

}

// We want to make sure that we didn't inadvertantly authorize entry into the

// LLInt unintentionally (due to corrupted jumps that skipped the check at the

// top, or otherwise). So, verify again that we are allowed to enter the LLInt.

WTF::compilerFence();

RELEASE_ASSERT(!scriptingIsForbidden());

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(createTailCallGate(JSEntryPtrTag, true));

else

#endif

codeRef.construct(MacroAssemblerCodeRef<NativeToJITGatePtrTag>::createSelfManagedCodeRef(CodePtr<NativeToJITGatePtrTag>::fromTaggedPtr(retagCodePtr<void*, CFunctionPtrTag, NativeToJITGatePtrTag>(&tailCallJSEntryTrampoline))));

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::tailCallJSEntryPtrTag)]= codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(createTailCallGate(JSEntryPtrTag, true));

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::tailCallJSEntrySlowPathPtrTag)] = codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(createTailCallGate(JSEntryPtrTag, false));

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::tailCallWithoutUntagJSEntryPtrTag)]= codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(createWasmTailCallGate(WasmEntryPtrTag));

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::wasmTailCallWasmEntryPtrTag)]= codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(createWasmTailCallGate(WasmEntryPtrTag));

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::wasmIPIntTailCallWasmEntryPtrTag)]= codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(exceptionHandlerGateThunk());

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::exceptionHandler)] = codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT)

if (Options::useJIT())

codeRef.construct(returnFromLLIntGateThunk());

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::returnFromLLInt)] = codeRef.get().code().taggedPtr();

}

#if ENABLE(JIT)

if (Options::useJIT()) {

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::loopOSREntry)] = loopOSREntryGateThunk().code().taggedPtr();

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::entryOSREntry)] = entryOSREntryGateThunk().code().taggedPtr();

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::wasmOSREntry)] = wasmOSREntryGateThunk().code().taggedPtr();

} else

#endif

{

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::loopOSREntry)] = LLInt::getCodeRef<NativeToJITGatePtrTag>(loop_osr_entry_gate).code().taggedPtr();

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::entryOSREntry)] = nullptr;

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::wasmOSREntry)] = nullptr;

}

#if ENABLE(WEBASSEMBLY)

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

if (Options::useJITCage() && Options::useJSPI())

codeRef.construct(relocateJITReturnPCThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(&relocate_jit_return_pc_return_location)));

else

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::relocateJITReturnPC)] = codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

if (Options::useJITCage() && Options::useJSPI())

codeRef.construct(exitImplantedSliceGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(&exit_implanted_slice)));

else

// Store untagged so it can be signed with IB + sp for use with retab

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::exitImplantedSliceGate)] = codeRef.get().code().untaggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

if (Options::useJITCage() && Options::useJSPI())

codeRef.construct(getSentinelFrameReturnPCGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(&get_sentinel_frame_return_pc_return_location)));

else

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::getSentinelFrameReturnPCGate)] = codeRef.get().code().taggedPtr();

}

{

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> codeRef;

#if ENABLE(JIT_CAGE)

if (Options::useJITCage())

codeRef.construct(wasmRestoreFrameGateThunk());

else

#endif

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::wasmRestoreFrame)] = codeRef.get().code().taggedPtr();

}

#endif

#if ENABLE(JIT)

#define INITIALIZE_TAG_AND_UNTAG_THUNKS_JIT_PATH(name) \

if (Options::useJIT()) { \

tagCodeRef.construct(tagGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(name##TagGateAfter))); \

untagCodeRef.construct(untagGateThunk(retagCodePtr<void*, CFunctionPtrTag, OperationPtrTag>(name##UntagGateAfter))); \

} else

#else

#define INITIALIZE_TAG_AND_UNTAG_THUNKS_JIT_PATH(name)

#endif

#define INITIALIZE_TAG_AND_UNTAG_THUNKS(name) \

do { \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> tagCodeRef; \

static LazyNeverDestroyed<MacroAssemblerCodeRef<NativeToJITGatePtrTag>> untagCodeRef; \

INITIALIZE_TAG_AND_UNTAG_THUNKS_JIT_PATH(name) { \

tagCodeRef.construct(LLInt::getCodeRef<NativeToJITGatePtrTag>(js_trampoline_##name##_tag)); \

untagCodeRef.construct(LLInt::getCodeRef<NativeToJITGatePtrTag>(js_trampoline_##name##_untag)); \

} \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##Tag)] = tagCodeRef.get().code().taggedPtr(); \

g_jscConfig.llint.gateMap[static_cast<unsigned>(Gate::name##Untag)] = untagCodeRef.get().code().taggedPtr(); \

} while (0);

INITIALIZE_TAG_AND_UNTAG_THUNKS(llint_function_for_call_arity_check);

INITIALIZE_TAG_AND_UNTAG_THUNKS(llint_function_for_construct_arity_check);

#endif // CPU(ARM64E)

#endif // ENABLE(C_LOOP)

g_jscConfig.defaultCallThunk = defaultCall().code().taggedPtr();

#if ENABLE(JIT)

if (Options::useJIT())

g_jscConfig.arityFixupThunk = arityFixupThunk().code().taggedPtr();

#endif

WTF::compilerFence();

RELEASE_ASSERT(!scriptingIsForbidden());

}

} } // namespace JSC::LLInt

WTF_ALLOW_UNSAFE_BUFFER_USAGE_END

WebKit/Source/JavaScriptCore/llint/LLIntData.cpp at main · WebKit/WebKit · GitHub

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