webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 69 insertions, 27 deletions

diff --git a/Source/JavaScriptCore/ftl/FTLJITCode.cpp b/Source/JavaScriptCore/ftl/FTLJITCode.cpp
index cdc7de0c3..1cdb50957 100644
--- a/Source/JavaScriptCore/ftl/FTLJITCode.cpp
+++ b/Source/JavaScriptCore/ftl/FTLJITCode.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2013, 2015-2016 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -28,8 +28,12 @@
 
 #if ENABLE(FTL_JIT)
 
+#include "FTLState.h"
+
 namespace JSC { namespace FTL {
 
+using namespace B3;
+
 JITCode::JITCode()
     : JSC::JITCode(FTLJIT)
 {
@@ -37,44 +41,54 @@ JITCode::JITCode()
 
 JITCode::~JITCode()
 {
+    if (FTL::shouldDumpDisassembly()) {
+        dataLog("Destroying FTL JIT code at ");
+        CommaPrinter comma;
+        dataLog(comma, m_b3Code);
+        dataLog(comma, m_arityCheckEntrypoint);
+        dataLog("\n");
+    }
 }
 
-void JITCode::initializeExitThunks(CodeRef exitThunks)
+void JITCode::initializeB3Code(CodeRef b3Code)
 {
-    m_exitThunks = exitThunks;
+    m_b3Code = b3Code;
 }
 
-void JITCode::addHandle(PassRefPtr<ExecutableMemoryHandle> handle)
+void JITCode::initializeB3Byproducts(std::unique_ptr<OpaqueByproducts> byproducts)
 {
-    m_handles.append(handle);
+    m_b3Byproducts = WTFMove(byproducts);
 }
 
-void JITCode::addDataSection(RefCountedArray<LSectionWord> dataSection)
+void JITCode::initializeAddressForCall(CodePtr address)
 {
-    m_dataSections.append(dataSection);
+    m_addressForCall = address;
 }
 
-void JITCode::initializeCode(CodeRef entrypoint)
+void JITCode::initializeArityCheckEntrypoint(CodeRef entrypoint)
 {
-    m_entrypoint = entrypoint;
+    m_arityCheckEntrypoint = entrypoint;
 }
 
-JITCode::CodePtr JITCode::addressForCall()
+JITCode::CodePtr JITCode::addressForCall(ArityCheckMode arityCheck)
 {
-    RELEASE_ASSERT(m_entrypoint);
-    return m_entrypoint.code();
+    switch (arityCheck) {
+    case ArityCheckNotRequired:
+        return m_addressForCall;
+    case MustCheckArity:
+        return m_arityCheckEntrypoint.code();
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return CodePtr();
 }
 
 void* JITCode::executableAddressAtOffset(size_t offset)
 {
-    RELEASE_ASSERT(m_entrypoint);
-    return reinterpret_cast<char*>(m_entrypoint.code().executableAddress()) + offset;
+    return reinterpret_cast<char*>(m_addressForCall.executableAddress()) + offset;
 }
 
 void* JITCode::dataAddressAtOffset(size_t)
 {
-    RELEASE_ASSERT(m_entrypoint);
-
     // We can't patch FTL code, yet. Even if we did, it's not clear that we would do so
     // through this API.
     RELEASE_ASSERT_NOT_REACHED();
@@ -83,8 +97,6 @@ void* JITCode::dataAddressAtOffset(size_t)
 
 unsigned JITCode::offsetOf(void*)
 {
-    RELEASE_ASSERT(m_entrypoint);
-
     // We currently don't have visibility into the FTL code.
     RELEASE_ASSERT_NOT_REACHED();
     return 0;
@@ -92,8 +104,6 @@ unsigned JITCode::offsetOf(void*)
 
 size_t JITCode::size()
 {
-    RELEASE_ASSERT(m_entrypoint);
-
     // We don't know the size of FTL code, yet. Make a wild guess. This is mostly used for
     // GC load estimates.
     return 1000;
@@ -101,18 +111,11 @@ size_t JITCode::size()
 
 bool JITCode::contains(void*)
 {
-    RELEASE_ASSERT(m_entrypoint);
-
     // We have no idea what addresses the FTL code contains, yet.
     RELEASE_ASSERT_NOT_REACHED();
     return false;
 }
 
-JITCode::CodePtr JITCode::exitThunks()
-{
-    return m_exitThunks.code();
-}
-
 JITCode* JITCode::ftl()
 {
     return this;
@@ -123,6 +126,45 @@ DFG::CommonData* JITCode::dfgCommon()
     return &common;
 }
 
+void JITCode::validateReferences(const TrackedReferences& trackedReferences)
+{
+    common.validateReferences(trackedReferences);
+    
+    for (OSRExit& exit : osrExit)
+        exit.m_descriptor->validateReferences(trackedReferences);
+}
+
+RegisterSet JITCode::liveRegistersToPreserveAtExceptionHandlingCallSite(CodeBlock*, CallSiteIndex callSiteIndex)
+{
+    for (OSRExit& exit : osrExit) {
+        if (exit.m_exceptionHandlerCallSiteIndex.bits() == callSiteIndex.bits()) {
+            RELEASE_ASSERT(exit.isExceptionHandler());
+            RELEASE_ASSERT(exit.isGenericUnwindHandler());
+            return ValueRep::usedRegisters(exit.m_valueReps);
+        }
+    }
+    return RegisterSet();
+}
+
+std::optional<CodeOrigin> JITCode::findPC(CodeBlock* codeBlock, void* pc)
+{
+    for (OSRExit& exit : osrExit) {
+        if (ExecutableMemoryHandle* handle = exit.m_code.executableMemory()) {
+            if (handle->start() <= pc && pc < handle->end())
+                return std::optional<CodeOrigin>(exit.m_codeOriginForExitProfile);
+        }
+    }
+
+    for (std::unique_ptr<LazySlowPath>& lazySlowPath : lazySlowPaths) {
+        if (ExecutableMemoryHandle* handle = lazySlowPath->stub().executableMemory()) {
+            if (handle->start() <= pc && pc < handle->end())
+                return std::optional<CodeOrigin>(codeBlock->codeOrigin(lazySlowPath->callSiteIndex()));
+        }
+    }
+
+    return std::nullopt;
+}
+
 } } // namespace JSC::FTL
 
 #endif // ENABLE(FTL_JIT)