Changeset 229481 in webkit for trunk/Source/JavaScriptCore/offlineasm/risc.rb

Timestamp:

Mar 9, 2018, 1:35:17 PM (7 years ago)

Author:

[email protected]

Message:

[Re-landing] Prepare LLInt code to support pointer profiling.
​https://bugs.webkit.org/show_bug.cgi?id=183387
<rdar://problem/38199678>

Reviewed by JF Bastien.

Source/JavaScriptCore:

1. Introduced PtrTag enums for supporting pointer profiling later.

2. Also introduced tagging, untagging, retagging, and tag removal placeholder template functions for the same purpose.

3. Prepare the offlineasm for supporting pointer profiling later.

4. Tagged some pointers in LLInt asm code. Currently, these should have no effect on behavior.

5. Removed returnToThrowForThrownException() because it is not used anywhere.

6. Added the offlineasm folder to JavaScriptCore Xcode project so that it's easier to view and edit these files in Xcode.

• CMakeLists.txt:
• JavaScriptCore.xcodeproj/project.pbxproj:
• bytecode/LLIntCallLinkInfo.h:

(JSC::LLIntCallLinkInfo::unlink):

• llint/LLIntData.cpp:

(JSC::LLInt::initialize):

• llint/LLIntData.h:
• llint/LLIntExceptions.cpp:

(JSC::LLInt::returnToThrowForThrownException): Deleted.

• llint/LLIntExceptions.h:
• llint/LLIntOfflineAsmConfig.h:
• llint/LLIntOffsetsExtractor.cpp:
• llint/LLIntPCRanges.h:

(JSC::LLInt::isLLIntPC):

• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::LLINT_SLOW_PATH_DECL):
(JSC::LLInt::handleHostCall):
(JSC::LLInt::setUpCall):

• llint/LowLevelInterpreter.asm:
• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:
• offlineasm/ast.rb:
• offlineasm/instructions.rb:
• offlineasm/risc.rb:
• runtime/PtrTag.h: Added.

(JSC::uniquePtrTagID):
(JSC::ptrTag):
(JSC::tagCodePtr):
(JSC::untagCodePtr):
(JSC::retagCodePtr):
(JSC::removeCodePtrTag):

Source/WTF:

• wtf/Platform.h:

File:

• trunk/Source/JavaScriptCore/offlineasm/risc.rb (modified) (1 diff)

trunk/Source/JavaScriptCore/offlineasm/risc.rb

@@ -449 +449 @@
 def riscLowerMisplacedAddresses(list)
     newList = []
-    list.each {
-        | node |
-        if node.is_a? Instruction
+    hasBackendSpecificLowering = Instruction.respond_to? "lowerMisplacedAddresses#{$activeBackend}"
+    list.each {
+        | node |
+        if node.is_a? Instruction
+            if hasBackendSpecificLowering
+                wasHandled, newList = Instruction.send("lowerMisplacedAddresses#{$activeBackend}", node, newList)
+                next if wasHandled
+            end
+
             postInstructions = []
             annotation = node.annotation