Changeset 239188 in webkit

Timestamp:

Dec 13, 2018 4:53:11 PM (5 years ago)

Author:

mark.lam@apple.com

Message:

Add the JSC_traceBaselineJITExecution option for tracing baseline JIT execution.
​https://bugs.webkit.org/show_bug.cgi?id=192684

Reviewed by Saam Barati.

This dataLogs the bytecode execution order of baseline JIT code when the
JSC_traceBaselineJITExecution option is true.

• jit/JIT.cpp:

(JSC::JIT::privateCompileMainPass):
(JSC::JIT::privateCompileSlowCases):

• runtime/Options.h:

Location:

trunk/Source/JavaScriptCore

Files:

• ChangeLog (modified) (1 diff)
• jit/JIT.cpp (modified) (3 diffs)
• runtime/Options.h (modified) (1 diff)

trunk/Source/JavaScriptCore/ChangeLog

@@ +1 @@
+2018-12-13  Mark Lam  <mark.lam@apple.com>
+
+        Add the JSC_traceBaselineJITExecution option for tracing baseline JIT execution.
+        https://bugs.webkit.org/show_bug.cgi?id=192684
+
+        Reviewed by Saam Barati.
+
+        This dataLogs the bytecode execution order of baseline JIT code when the
+        JSC_traceBaselineJITExecution option is true.
+
+        * jit/JIT.cpp:
+        (JSC::JIT::privateCompileMainPass):
+        (JSC::JIT::privateCompileSlowCases):
+        * runtime/Options.h:
+
 2018-12-13  David Kilzer  <ddkilzer@apple.com>
 

trunk/Source/JavaScriptCore/jit/JIT.cpp

@@ -45 +45 @@
 #include "ModuleProgramCodeBlock.h"
 #include "PCToCodeOriginMap.h"
+#include "ProbeContext.h"
 #include "ProfilerDatabase.h"
 #include "ProgramCodeBlock.h"
@@ -270 +271 @@
 
         unsigned bytecodeOffset = m_bytecodeOffset;
+#if ENABLE(MASM_PROBE)
+        if (UNLIKELY(Options::traceBaselineJITExecution())) {
+            CodeBlock* codeBlock = m_codeBlock;
+            probe([=] (Probe::Context& ctx) {
+                dataLogLn("JIT [", bytecodeOffset, "] ", opcodeNames[opcodeID], " cfr ", RawPointer(ctx.fp()), " @ ", codeBlock);
+            });
+        }
+#endif
 
         switch (opcodeID) {
@@ -494 +503 @@
             m_disassembler->setForBytecodeSlowPath(m_bytecodeOffset, label());
 
+#if ENABLE(MASM_PROBE)
+        if (UNLIKELY(Options::traceBaselineJITExecution())) {
+            OpcodeID opcodeID = currentInstruction->opcodeID();
+            unsigned bytecodeOffset = m_bytecodeOffset;
+            CodeBlock* codeBlock = m_codeBlock;
+            probe([=] (Probe::Context& ctx) {
+                dataLogLn("JIT [", bytecodeOffset, "] SLOW ", opcodeNames[opcodeID], " cfr ", RawPointer(ctx.fp()), " @ ", codeBlock);
+            });
+        }
+#endif
+
         switch (currentInstruction->opcodeID()) {
         DEFINE_SLOWCASE_OP(op_add)

trunk/Source/JavaScriptCore/runtime/Options.h

@@ -508 +508 @@
     v(bool, traceLLIntExecution, false, Configurable, nullptr) \
     v(bool, traceLLIntSlowPath, false, Configurable, nullptr) \
+    v(bool, traceBaselineJITExecution, false, Normal, nullptr) \