Changeset 40813 in webkit for trunk/JavaScriptCore/assembler

Timestamp:

Feb 10, 2009, 12:43:32 AM (16 years ago)

Author:

[email protected]

Message:

2009-02-09 Gavin Barraclough <​[email protected]>

Reviewed by Oliver Hunt.

Provide a class type for a generated block of JIT code.
Also changes the return address -> bytecode index map to
track the return addess as an unsigned offset into the code
instead of a ptrdiff_t in terms of voids - the latter is
equal to the actual offset / sizeof(void*), making it a
potentially lossy representation.

• JavaScriptCore.xcodeproj/project.pbxproj:
• assembler/AbstractMacroAssembler.h: (JSC::AbstractMacroAssembler::PatchBuffer::returnAddressOffset):
• assembler/X86Assembler.h: (JSC::X86Assembler::getCallReturnOffset):
• bytecode/CodeBlock.h: (JSC::CallReturnOffsetToBytecodeIndex::CallReturnOffsetToBytecodeIndex): (JSC::getCallReturnOffset): (JSC::CodeBlock::getBytecodeIndex): (JSC::CodeBlock::jitCode): (JSC::CodeBlock::callReturnIndexVector):
• interpreter/Interpreter.cpp: (JSC::Interpreter::execute): (JSC::Interpreter::cti_vm_dontLazyLinkCall): (JSC::Interpreter::cti_vm_lazyLinkCall):
• jit/JIT.cpp: (JSC::JIT::privateCompile):
• jit/JIT.h: (JSC::):
• jit/JITCall.cpp: (JSC::JIT::linkCall):
• jit/JITCode.h: Added. (JSC::): (JSC::JITCode::JITCode): (JSC::JITCode::operator bool): (JSC::JITCode::addressForCall): (JSC::JITCode::offsetOf): (JSC::JITCode::execute):

Location:

trunk/JavaScriptCore/assembler

Files:

• AbstractMacroAssembler.h (modified) (1 diff)
• X86Assembler.h (modified) (1 diff)

trunk/JavaScriptCore/assembler/AbstractMacroAssembler.h

@@ -359 +359 @@
         }
 
+        ptrdiff_t returnAddressOffset(Jump call)
+        {
+            return AssemblerType::getCallReturnOffset(call.m_jmp);
+        }
+
         void setPtr(DataLabelPtr label, void* value)
         {

trunk/JavaScriptCore/assembler/X86Assembler.h

@@ -1247 +1247 @@
     }
     
+    static ptrdiff_t getCallReturnOffset(JmpSrc call)
+    {
+        return call.m_offset;
+    }
+
     static void* getRelocatedAddress(void* code, JmpSrc jump)
     {