mgaudet

#-------------------------------------------------------------------------------
# MultiTimer Common File
#
# Author: Zachary Selk
# Date:   Jul 18, 2019
#-------------------------------------------------------------------------------
.data
.align 2
DISPLAY_CONTROL:    .word 0xFFFF0008
DISPLAY_DATA:       .word 0xFFFF000C

mgaudet

Shapes: A set of References

• A good overview of the high level concept from the Ruby community, which is considering trying to adopt object shapes themselves:
  • The Future Shape of Ruby Objects
  • https://bugs.ruby-lang.org/issues/18776
• The Concrete Comment describing our shapes:
  • Shape.h - mozsearch
  • PropMap.h - mozsearch
• An overview from Mattias Bynens:
  • JavaScript engine fundamentals: Shapes and Inline Caches · Mathias Bynens

mgaudet

$ ../../../mach run run.js                                              # Interpreter, CacheIR, Baseline, Ion:  34252	(3.5x)
$ ../../../mach run --no-ion run.js                                     # Interpreter, CacheIR, Baseline:       9887 	(2.0x) 
$ ../../../mach run --no-ion --no-baseline --cache-ir-stubs=on run.js   # Interpreter, CacheIR:                 4890 	(6.6x)
$ ../../../mach run --no-ion --no-baseline --cache-ir-stubs=off run.js  # Interpreter:                          739			

MOZCONFIG: 

ac_add_options --enable-application=js

ac_add_options --enable-optimize

mgaudet

Example 2: Shadowing and closing over.

Remember: Pairs are (ScriptNum, ScopeNum)

// Script 1
// Scope 1
var x = 1;                              // Declared(1) = [x];
function f() // Script 2
{ // Scope 2

mgaudet

FunctionNode* Parser<FullParseHandler, Unit>::standaloneFunction

• Has a Function argument, Called from
• FunctionNode* frontend::StandaloneFunctionCompiler<Unit>::parse which has a function argument, called from
• static bool CompileStandaloneFunction which has a function argument. Called from
  • bool frontend::CompileStandaloneGenerator
  • bool frontend::CompileStandaloneAsyncFunction
  • bool frontend::CompileStandaloneAsyncGenerator
    • All of the above CompileStandAlones, plus the below CompileStandAloneFunction are called from CreateDynamicFunction: the function is allocated there. The above three are -only- called from CreateDynamicFunction.
• bool frontend::CompileStandaloneFunction which has a function argument. Called from

mgaudet

        0x2b872bbb5456: testl  %edx, %edx                 ; branchTest32 (the test)
        0x2b872bbb5458: jne    0x2b872bbb546d             ; branchTest32 (the jump to true)
        0x2b872bbb545e: movabsq $0x37c1c9d258a0, %rax     ; movPtr 
        0x2b872bbb5468: jmp    0x2b872bbb5477             ; jump done
true:   0x2b872bbb546d: movabsq $0x37c1c9d27480, %rax     ; movPtr
done:   0x2b872bbb5477: <unrelated instruction>

mgaudet

$ java -Xjit:traceIlGen,log=logFile,verbose -version

#INFO:  _______________________________________
#INFO:  Version Information:
#INFO:       JIT Level  - 292f272
#INFO:       JVM Level  - 20171027_36
#INFO:       GC Level   - 292f272
#INFO:  
#INFO:  Processor Information:
#INFO:       Platform Info:X86 Intel P6

mgaudet

$ java -Xjit:traceIlGen,log=logFile,verbose -version

#INFO:  _______________________________________
#INFO:  Version Information:
#INFO:       JIT Level  - 292f272
#INFO:       JVM Level  - 20171027_36
#INFO:       GC Level   - 292f272
#INFO:  
#INFO:  Processor Information:
#INFO:       Platform Info:X86 Intel P6

mgaudet

<?xml version="1.0" standalone="no"?>
<jitlog>
<!--
MULTIPLE LOG FILES MAY EXIST
Please check for ADDITIONAL log files named:  logFile.1  logFile.2  logFile.3  logFile.4  logFile.5  logFile.6
-->
<compile
	method="java/lang/String.hashCode()I"
	hotness="warm"
	isProfilingCompile=0>

mgaudet

From 595dfc0c2b55e5b5da418c4f80d4922817822b74 Mon Sep 17 00:00:00 2001
From: Matthew Gaudet <magaudet@ca.ibm.com>
Date: Mon, 5 Dec 2016 09:38:57 -0500
Subject: [PATCH] Revert "Register a handler for sigabrt."

---
 signal.c | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/signal.c b/signal.c