Title: [189711] releases/WebKitGTK/webkit-2.10/Source/_javascript_Core
Revision
189711
Author
carlo...@webkit.org
Date
2015-09-14 05:00:47 -0700 (Mon, 14 Sep 2015)

Log Message

Merge r188648 - Add ability to save and restore JSC options.
https://bugs.webkit.org/show_bug.cgi?id=148125

Reviewed by Saam Barati.

* API/tests/ExecutionTimeLimitTest.cpp:
(testExecutionTimeLimit):
- Employ the new options getter/setter to run watchdog tests for each of the
  execution engine tiers.
- Also altered the test scripts to be in a function instead of global code.
  This is one of 2 changes needed to give them an opportunity to be FTL compiled.
  The other is to add support for compiling CheckWatchdogTimer in the FTL (which
  will be addressed in a separate patch).

* jsc.cpp:
(CommandLine::parseArguments):
* runtime/Options.cpp:
(JSC::parse):
- Add the ability to clear a string option with a nullptr value.
  This is needed to restore a default string option value which may be null.

(JSC::OptionRange::init):
- Add the ability to clear a range option with a null value.
  This is needed to restore a default range option value which may be null.

(JSC::Options::initialize):
(JSC::Options::dumpOptionsIfNeeded):
- Factor code to dump options out to dumpOptionsIfNeeded() since we will need
  that logic elsewhere.

(JSC::Options::setOptions):
- Parse an options string and set each of the specified options.

(JSC::Options::dumpAllOptions):
(JSC::Options::dumpAllOptionsInALine):
(JSC::Options::dumpOption):
(JSC::Option::dump):
- Refactored so that the underlying dumper dumps to a StringBuilder instead of
  stderr.  This lets us reuse this code to serialize all the options into a
  single string for dumpAllOptionsInALine().

* runtime/Options.h:
(JSC::OptionRange::rangeString):

Modified Paths

Diff

Modified: releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/API/tests/ExecutionTimeLimitTest.cpp (189710 => 189711)


--- releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/API/tests/ExecutionTimeLimitTest.cpp	2015-09-14 11:11:43 UTC (rev 189710)
+++ releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/API/tests/ExecutionTimeLimitTest.cpp	2015-09-14 12:00:47 UTC (rev 189711)
@@ -26,12 +26,16 @@
 #include "config.h"
 #include "ExecutionTimeLimitTest.h"
 
+#include "InitializeThreading.h"
 #include "JSContextRefPrivate.h"
 #include "_javascript_Core.h"
+#include "Options.h"
 #include <chrono>
 #include <wtf/CurrentTime.h>
+#include <wtf/text/StringBuilder.h>
 
 using namespace std::chrono;
+using JSC::Options;
 
 static JSGlobalContextRef context = nullptr;
 
@@ -48,27 +52,22 @@
 }
 
 bool shouldTerminateCallbackWasCalled = false;
-static bool shouldTerminateCallback(JSContextRef ctx, void* context)
+static bool shouldTerminateCallback(JSContextRef, void*)
 {
-    UNUSED_PARAM(ctx);
-    UNUSED_PARAM(context);
     shouldTerminateCallbackWasCalled = true;
     return true;
 }
 
 bool cancelTerminateCallbackWasCalled = false;
-static bool cancelTerminateCallback(JSContextRef ctx, void* context)
+static bool cancelTerminateCallback(JSContextRef, void*)
 {
-    UNUSED_PARAM(ctx);
-    UNUSED_PARAM(context);
     cancelTerminateCallbackWasCalled = true;
     return false;
 }
 
 int extendTerminateCallbackCalled = 0;
-static bool extendTerminateCallback(JSContextRef ctx, void* context)
+static bool extendTerminateCallback(JSContextRef ctx, void*)
 {
-    UNUSED_PARAM(context);
     extendTerminateCallbackCalled++;
     if (extendTerminateCallbackCalled == 1) {
         JSContextGroupRef contextGroup = JSContextGetGroup(ctx);
@@ -78,159 +77,234 @@
     return true;
 }
 
+struct TierOptions {
+    const char* tier;
+    unsigned timeLimitAdjustmentMillis;
+    const char* optionsStr;
+};
 
 int testExecutionTimeLimit()
 {
-    context = JSGlobalContextCreateInGroup(nullptr, nullptr);
+    static const TierOptions tierOptionsList[] = {
+        { "LLINT",    0,   "--enableConcurrentJIT=false --useLLInt=true --useJIT=false" },
+        { "Baseline", 0,   "--enableConcurrentJIT=false --useLLInt=true --useJIT=true --useDFGJIT=false" },
+        { "DFG",      0,   "--enableConcurrentJIT=false --useLLInt=true --useJIT=true --useDFGJIT=true --useFTLJIT=false" },
+        { "FTL",      200, "--enableConcurrentJIT=false --useLLInt=true --useJIT=true --useDFGJIT=true --useFTLJIT=true" },
+    };
+    
+    bool failed = false;
 
-    JSContextGroupRef contextGroup = JSContextGetGroup(context);
-    JSObjectRef globalObject = JSContextGetGlobalObject(context);
-    ASSERT(JSValueIsObject(context, globalObject));
+    JSC::initializeThreading();
+    Options::initialize(); // Ensure options is initialized first.
 
-    JSValueRef v = nullptr;
-    JSValueRef exception = nullptr;
-    bool failed = false;
+    for (auto tierOptions : tierOptionsList) {
+        StringBuilder savedOptionsBuilder;
+        Options::dumpAllOptionsInALine(savedOptionsBuilder);
 
-    JSStringRef currentCPUTimeStr = JSStringCreateWithUTF8CString("currentCPUTime");
-    JSObjectRef currentCPUTimeFunction = JSObjectMakeFunctionWithCallback(context, currentCPUTimeStr, currentCPUTimeAsJSFunctionCallback);
-    JSObjectSetProperty(context, globalObject, currentCPUTimeStr, currentCPUTimeFunction, kJSPropertyAttributeNone, nullptr);
-    JSStringRelease(currentCPUTimeStr);
-    
-    /* Test script timeout: */
-    JSContextGroupSetExecutionTimeLimit(contextGroup, .10f, shouldTerminateCallback, 0);
-    {
-        const char* loopForeverScript = "var startTime = currentCPUTime(); while (true) { if (currentCPUTime() - startTime > .150) break; } ";
-        JSStringRef script = JSStringCreateWithUTF8CString(loopForeverScript);
-        exception = nullptr;
-        shouldTerminateCallbackWasCalled = false;
-        auto startTime = currentCPUTime();
-        v = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
-        auto endTime = currentCPUTime();
+        Options::setOptions(tierOptions.optionsStr);
         
-        if (((endTime - startTime) < milliseconds(150)) && shouldTerminateCallbackWasCalled)
-            printf("PASS: script timed out as expected.\n");
-        else {
-            if (!((endTime - startTime) < milliseconds(150)))
-                printf("FAIL: script did not time out as expected.\n");
-            if (!shouldTerminateCallbackWasCalled)
-                printf("FAIL: script timeout callback was not called.\n");
-            failed = true;
-        }
+        unsigned tierAdjustmentMillis = tierOptions.timeLimitAdjustmentMillis;
+        double timeLimit;
+
+        context = JSGlobalContextCreateInGroup(nullptr, nullptr);
+
+        JSContextGroupRef contextGroup = JSContextGetGroup(context);
+        JSObjectRef globalObject = JSContextGetGlobalObject(context);
+        ASSERT(JSValueIsObject(context, globalObject));
+
+        JSValueRef scriptResult = nullptr;
+        JSValueRef exception = nullptr;
+
+        JSStringRef currentCPUTimeStr = JSStringCreateWithUTF8CString("currentCPUTime");
+        JSObjectRef currentCPUTimeFunction = JSObjectMakeFunctionWithCallback(context, currentCPUTimeStr, currentCPUTimeAsJSFunctionCallback);
+        JSObjectSetProperty(context, globalObject, currentCPUTimeStr, currentCPUTimeFunction, kJSPropertyAttributeNone, nullptr);
+        JSStringRelease(currentCPUTimeStr);
         
-        if (!exception) {
-            printf("FAIL: TerminatedExecutionException was not thrown.\n");
-            failed = true;
+        /* Test script timeout: */
+        timeLimit = (100 + tierAdjustmentMillis) / 1000.0;
+        JSContextGroupSetExecutionTimeLimit(contextGroup, timeLimit, shouldTerminateCallback, 0);
+        {
+            unsigned timeAfterWatchdogShouldHaveFired = 150 + tierAdjustmentMillis;
+
+            StringBuilder scriptBuilder;
+            scriptBuilder.append("function foo() { var startTime = currentCPUTime(); while (true) { for (var i = 0; i < 1000; i++); if (currentCPUTime() - startTime > ");
+            scriptBuilder.appendNumber(timeAfterWatchdogShouldHaveFired / 1000.0);
+            scriptBuilder.append(") break; } } foo();");
+
+            JSStringRef script = JSStringCreateWithUTF8CString(scriptBuilder.toString().utf8().data());
+            exception = nullptr;
+            shouldTerminateCallbackWasCalled = false;
+            auto startTime = currentCPUTime();
+            scriptResult = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+            auto endTime = currentCPUTime();
+
+            if (((endTime - startTime) < milliseconds(timeAfterWatchdogShouldHaveFired)) && shouldTerminateCallbackWasCalled)
+                printf("PASS: %s script timed out as expected.\n", tierOptions.tier);
+            else {
+                if ((endTime - startTime) >= milliseconds(timeAfterWatchdogShouldHaveFired))
+                    printf("FAIL: %s script did not time out as expected.\n", tierOptions.tier);
+                if (!shouldTerminateCallbackWasCalled)
+                    printf("FAIL: %s script timeout callback was not called.\n", tierOptions.tier);
+                failed = true;
+            }
+            
+            if (!exception) {
+                printf("FAIL: %s TerminatedExecutionException was not thrown.\n", tierOptions.tier);
+                failed = true;
+            }
         }
-    }
-    
-    /* Test the script timeout's TerminatedExecutionException should NOT be catchable: */
-    JSContextGroupSetExecutionTimeLimit(contextGroup, 0.10f, shouldTerminateCallback, 0);
-    {
-        const char* loopForeverScript = "var startTime = currentCPUTime(); try { while (true) { if (currentCPUTime() - startTime > .150) break; } } catch(e) { }";
-        JSStringRef script = JSStringCreateWithUTF8CString(loopForeverScript);
-        exception = nullptr;
-        shouldTerminateCallbackWasCalled = false;
-        auto startTime = currentCPUTime();
-        v = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
-        auto endTime = currentCPUTime();
-        
-        if (((endTime - startTime) >= milliseconds(150)) || !shouldTerminateCallbackWasCalled) {
-            if (!((endTime - startTime) < milliseconds(150)))
-                printf("FAIL: script did not time out as expected.\n");
-            if (!shouldTerminateCallbackWasCalled)
-                printf("FAIL: script timeout callback was not called.\n");
-            failed = true;
+
+        /* Test the script timeout's TerminatedExecutionException should NOT be catchable: */
+        timeLimit = (100 + tierAdjustmentMillis) / 1000.0;
+        JSContextGroupSetExecutionTimeLimit(contextGroup, timeLimit, shouldTerminateCallback, 0);
+        {
+            unsigned timeAfterWatchdogShouldHaveFired = 150 + tierAdjustmentMillis;
+            
+            StringBuilder scriptBuilder;
+            scriptBuilder.append("function foo() { var startTime = currentCPUTime(); try { while (true) { for (var i = 0; i < 1000; i++); if (currentCPUTime() - startTime > ");
+            scriptBuilder.appendNumber(timeAfterWatchdogShouldHaveFired / 1000.0);
+            scriptBuilder.append(") break; } } catch(e) { } } foo();");
+
+            JSStringRef script = JSStringCreateWithUTF8CString(scriptBuilder.toString().utf8().data());
+            exception = nullptr;
+            shouldTerminateCallbackWasCalled = false;
+
+            auto startTime = currentCPUTime();
+            scriptResult = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+            auto endTime = currentCPUTime();
+            
+            if (((endTime - startTime) >= milliseconds(timeAfterWatchdogShouldHaveFired)) || !shouldTerminateCallbackWasCalled) {
+                if (!((endTime - startTime) < milliseconds(timeAfterWatchdogShouldHaveFired)))
+                    printf("FAIL: %s script did not time out as expected.\n", tierOptions.tier);
+                if (!shouldTerminateCallbackWasCalled)
+                    printf("FAIL: %s script timeout callback was not called.\n", tierOptions.tier);
+                failed = true;
+            }
+            
+            if (exception)
+                printf("PASS: %s TerminatedExecutionException was not catchable as expected.\n", tierOptions.tier);
+            else {
+                printf("FAIL: %s TerminatedExecutionException was caught.\n", tierOptions.tier);
+                failed = true;
+            }
         }
         
-        if (exception)
-            printf("PASS: TerminatedExecutionException was not catchable as expected.\n");
-        else {
-            printf("FAIL: TerminatedExecutionException was caught.\n");
-            failed = true;
+        /* Test script timeout with no callback: */
+        timeLimit = (100 + tierAdjustmentMillis) / 1000.0;
+        JSContextGroupSetExecutionTimeLimit(contextGroup, timeLimit, 0, 0);
+        {
+            unsigned timeAfterWatchdogShouldHaveFired = 150 + tierAdjustmentMillis;
+            
+            StringBuilder scriptBuilder;
+            scriptBuilder.append("function foo() { var startTime = currentCPUTime(); while (true) { for (var i = 0; i < 1000; i++); if (currentCPUTime() - startTime > ");
+            scriptBuilder.appendNumber(timeAfterWatchdogShouldHaveFired / 1000.0);
+            scriptBuilder.append(") break; } } foo();");
+            
+            JSStringRef script = JSStringCreateWithUTF8CString(scriptBuilder.toString().utf8().data());
+            exception = nullptr;
+            shouldTerminateCallbackWasCalled = false;
+
+            auto startTime = currentCPUTime();
+            scriptResult = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+            auto endTime = currentCPUTime();
+            
+            if (((endTime - startTime) < milliseconds(timeAfterWatchdogShouldHaveFired)) && !shouldTerminateCallbackWasCalled)
+                printf("PASS: %s script timed out as expected when no callback is specified.\n", tierOptions.tier);
+            else {
+                if ((endTime - startTime) >= milliseconds(timeAfterWatchdogShouldHaveFired))
+                    printf("FAIL: %s script did not time out as expected when no callback is specified.\n", tierOptions.tier);
+                else
+                    printf("FAIL: %s script called stale callback function.\n", tierOptions.tier);
+                failed = true;
+            }
+            
+            if (!exception) {
+                printf("FAIL: %s TerminatedExecutionException was not thrown.\n", tierOptions.tier);
+                failed = true;
+            }
         }
-    }
-    
-    /* Test script timeout with no callback: */
-    JSContextGroupSetExecutionTimeLimit(contextGroup, .10f, 0, 0);
-    {
-        const char* loopForeverScript = "var startTime = currentCPUTime(); while (true) { if (currentCPUTime() - startTime > .150) break; } ";
-        JSStringRef script = JSStringCreateWithUTF8CString(loopForeverScript);
-        exception = nullptr;
-        auto startTime = currentCPUTime();
-        v = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
-        auto endTime = currentCPUTime();
         
-        if (((endTime - startTime) < milliseconds(150)) && shouldTerminateCallbackWasCalled)
-            printf("PASS: script timed out as expected when no callback is specified.\n");
-        else {
-            if (!((endTime - startTime) < milliseconds(150)))
-                printf("FAIL: script did not time out as expected when no callback is specified.\n");
-            failed = true;
+        /* Test script timeout cancellation: */
+        timeLimit = (100 + tierAdjustmentMillis) / 1000.0;
+        JSContextGroupSetExecutionTimeLimit(contextGroup, timeLimit, cancelTerminateCallback, 0);
+        {
+            unsigned timeAfterWatchdogShouldHaveFired = 150 + tierAdjustmentMillis;
+            
+            StringBuilder scriptBuilder;
+            scriptBuilder.append("function foo() { var startTime = currentCPUTime(); while (true) { for (var i = 0; i < 1000; i++); if (currentCPUTime() - startTime > ");
+            scriptBuilder.appendNumber(timeAfterWatchdogShouldHaveFired / 1000.0);
+            scriptBuilder.append(") break; } } foo();");
+
+            JSStringRef script = JSStringCreateWithUTF8CString(scriptBuilder.toString().utf8().data());
+            exception = nullptr;
+            cancelTerminateCallbackWasCalled = false;
+
+            auto startTime = currentCPUTime();
+            scriptResult = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+            auto endTime = currentCPUTime();
+            
+            if (((endTime - startTime) >= milliseconds(timeAfterWatchdogShouldHaveFired)) && cancelTerminateCallbackWasCalled && !exception)
+                printf("PASS: %s script timeout was cancelled as expected.\n", tierOptions.tier);
+            else {
+                if (((endTime - startTime) < milliseconds(timeAfterWatchdogShouldHaveFired)) || exception)
+                    printf("FAIL: %s script timeout was not cancelled.\n", tierOptions.tier);
+                if (!cancelTerminateCallbackWasCalled)
+                    printf("FAIL: %s script timeout callback was not called.\n", tierOptions.tier);
+                failed = true;
+            }
+            
+            if (exception) {
+                printf("FAIL: %s Unexpected TerminatedExecutionException thrown.\n", tierOptions.tier);
+                failed = true;
+            }
         }
         
-        if (!exception) {
-            printf("FAIL: TerminatedExecutionException was not thrown.\n");
-            failed = true;
+        /* Test script timeout extension: */
+        timeLimit = (100 + tierAdjustmentMillis) / 1000.0;
+        JSContextGroupSetExecutionTimeLimit(contextGroup, timeLimit, extendTerminateCallback, 0);
+        {
+            unsigned timeBeforeExtendedDeadline = 200 + tierAdjustmentMillis;
+            unsigned timeAfterExtendedDeadline = 400 + tierAdjustmentMillis;
+            unsigned maxBusyLoopTime = 600 + tierAdjustmentMillis;
+
+            StringBuilder scriptBuilder;
+            scriptBuilder.append("function foo() { var startTime = currentCPUTime(); while (true) { for (var i = 0; i < 1000; i++); if (currentCPUTime() - startTime > ");
+            scriptBuilder.appendNumber(maxBusyLoopTime / 1000.0); // in seconds.
+            scriptBuilder.append(") break; } } foo();");
+
+            JSStringRef script = JSStringCreateWithUTF8CString(scriptBuilder.toString().utf8().data());
+            exception = nullptr;
+            extendTerminateCallbackCalled = 0;
+
+            auto startTime = currentCPUTime();
+            scriptResult = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+            auto endTime = currentCPUTime();
+            auto deltaTime = endTime - startTime;
+            
+            if ((deltaTime >= milliseconds(timeBeforeExtendedDeadline)) && (deltaTime < milliseconds(timeAfterExtendedDeadline)) && (extendTerminateCallbackCalled == 2) && exception)
+                printf("PASS: %s script timeout was extended as expected.\n", tierOptions.tier);
+            else {
+                if (deltaTime < milliseconds(timeBeforeExtendedDeadline))
+                    printf("FAIL: %s script timeout was not extended as expected.\n", tierOptions.tier);
+                else if (deltaTime >= milliseconds(timeAfterExtendedDeadline))
+                    printf("FAIL: %s script did not timeout.\n", tierOptions.tier);
+                
+                if (extendTerminateCallbackCalled < 1)
+                    printf("FAIL: %s script timeout callback was not called.\n", tierOptions.tier);
+                if (extendTerminateCallbackCalled < 2)
+                    printf("FAIL: %s script timeout callback was not called after timeout extension.\n", tierOptions.tier);
+                
+                if (!exception)
+                    printf("FAIL: %s TerminatedExecutionException was not thrown during timeout extension test.\n", tierOptions.tier);
+                
+                failed = true;
+            }
         }
+
+        JSGlobalContextRelease(context);
+
+        Options::setOptions(savedOptionsBuilder.toString().ascii().data());
     }
     
-    /* Test script timeout cancellation: */
-    JSContextGroupSetExecutionTimeLimit(contextGroup, 0.10f, cancelTerminateCallback, 0);
-    {
-        const char* loopForeverScript = "var startTime = currentCPUTime(); while (true) { if (currentCPUTime() - startTime > .150) break; } ";
-        JSStringRef script = JSStringCreateWithUTF8CString(loopForeverScript);
-        exception = nullptr;
-        auto startTime = currentCPUTime();
-        v = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
-        auto endTime = currentCPUTime();
-        
-        if (((endTime - startTime) >= milliseconds(150)) && cancelTerminateCallbackWasCalled && !exception)
-            printf("PASS: script timeout was cancelled as expected.\n");
-        else {
-            if (((endTime - startTime) < milliseconds(150)) || exception)
-                printf("FAIL: script timeout was not cancelled.\n");
-            if (!cancelTerminateCallbackWasCalled)
-                printf("FAIL: script timeout callback was not called.\n");
-            failed = true;
-        }
-        
-        if (exception) {
-            printf("FAIL: Unexpected TerminatedExecutionException thrown.\n");
-            failed = true;
-        }
-    }
-    
-    /* Test script timeout extension: */
-    JSContextGroupSetExecutionTimeLimit(contextGroup, 0.100f, extendTerminateCallback, 0);
-    {
-        const char* loopForeverScript = "var startTime = currentCPUTime(); while (true) { if (currentCPUTime() - startTime > .500) break; } ";
-        JSStringRef script = JSStringCreateWithUTF8CString(loopForeverScript);
-        exception = nullptr;
-        auto startTime = currentCPUTime();
-        v = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
-        auto endTime = currentCPUTime();
-        auto deltaTime = endTime - startTime;
-        
-        if ((deltaTime >= milliseconds(300)) && (deltaTime < milliseconds(500)) && (extendTerminateCallbackCalled == 2) && exception)
-            printf("PASS: script timeout was extended as expected.\n");
-        else {
-            if (deltaTime < milliseconds(200))
-                printf("FAIL: script timeout was not extended as expected.\n");
-            else if (deltaTime >= milliseconds(500))
-                printf("FAIL: script did not timeout.\n");
-            
-            if (extendTerminateCallbackCalled < 1)
-                printf("FAIL: script timeout callback was not called.\n");
-            if (extendTerminateCallbackCalled < 2)
-                printf("FAIL: script timeout callback was not called after timeout extension.\n");
-            
-            if (!exception)
-                printf("FAIL: TerminatedExecutionException was not thrown during timeout extension test.\n");
-            
-            failed = true;
-        }
-    }
-
-    JSGlobalContextRelease(context);
     return failed;
 }

Modified: releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/ChangeLog (189710 => 189711)


--- releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/ChangeLog	2015-09-14 11:11:43 UTC (rev 189710)
+++ releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/ChangeLog	2015-09-14 12:00:47 UTC (rev 189711)
@@ -1,3 +1,78 @@
+2015-08-20  Mark Lam  <mark....@apple.com>
+
+        A watchdog tests is failing on Windows.
+        https://bugs.webkit.org/show_bug.cgi?id=148228
+
+        Reviewed by Brent Fulgham.
+
+        The test just needed a little more time because Windows' timer resolution is low.
+        After increasing the test deadlines, the test started passing.
+
+        * API/tests/ExecutionTimeLimitTest.cpp:
+        (testExecutionTimeLimit):
+
+2015-08-20  Mark Lam  <mark....@apple.com>
+
+        Fixed some warnings on Windows.
+        https://bugs.webkit.org/show_bug.cgi?id=148224
+
+        Reviewed by Brent Fulgham.
+
+        The Windows build was complaining that function params were hiding a global variable.
+        Since the function params were unused, I resolved this by removing the param names.
+
+        * API/tests/ExecutionTimeLimitTest.cpp:
+        (currentCPUTimeAsJSFunctionCallback):
+        (shouldTerminateCallback):
+        (cancelTerminateCallback):
+        (extendTerminateCallback):
+
+2015-08-19  Mark Lam  <mark....@apple.com>
+
+        Add ability to save and restore JSC options.
+        https://bugs.webkit.org/show_bug.cgi?id=148125
+
+        Reviewed by Saam Barati.
+
+        * API/tests/ExecutionTimeLimitTest.cpp:
+        (testExecutionTimeLimit):
+        - Employ the new options getter/setter to run watchdog tests for each of the
+          execution engine tiers.
+        - Also altered the test scripts to be in a function instead of global code.
+          This is one of 2 changes needed to give them an opportunity to be FTL compiled.
+          The other is to add support for compiling CheckWatchdogTimer in the FTL (which
+          will be addressed in a separate patch).
+
+        * jsc.cpp:
+        (CommandLine::parseArguments):
+        * runtime/Options.cpp:
+        (JSC::parse):
+        - Add the ability to clear a string option with a nullptr value.
+          This is needed to restore a default string option value which may be null.
+
+        (JSC::OptionRange::init):
+        - Add the ability to clear a range option with a null value.
+          This is needed to restore a default range option value which may be null.
+
+        (JSC::Options::initialize):
+        (JSC::Options::dumpOptionsIfNeeded):
+        - Factor code to dump options out to dumpOptionsIfNeeded() since we will need
+          that logic elsewhere.
+
+        (JSC::Options::setOptions):
+        - Parse an options string and set each of the specified options.
+
+        (JSC::Options::dumpAllOptions):
+        (JSC::Options::dumpAllOptionsInALine):
+        (JSC::Options::dumpOption):
+        (JSC::Option::dump):
+        - Refactored so that the underlying dumper dumps to a StringBuilder instead of
+          stderr.  This lets us reuse this code to serialize all the options into a
+          single string for dumpAllOptionsInALine().
+
+        * runtime/Options.h:
+        (JSC::OptionRange::rangeString):
+
 2015-08-26  Andreas Kling  <akl...@apple.com>
 
         [JSC] StructureTransitionTable should eagerly deallocate single-transition WeakImpls.

Modified: releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/jsc.cpp (189710 => 189711)


--- releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/jsc.cpp	2015-09-14 11:11:43 UTC (rev 189710)
+++ releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/jsc.cpp	2015-09-14 12:00:47 UTC (rev 189711)
@@ -1545,7 +1545,7 @@
         m_arguments.append(argv[i]);
 
     if (needToDumpOptions)
-        JSC::Options::dumpAllOptions(JSC::Options::DumpLevel::Verbose, "All JSC runtime options:", stderr);
+        JSC::Options::dumpAllOptions(stderr, JSC::Options::DumpLevel::Verbose, "All JSC runtime options:");
     JSC::Options::ensureOptionsAreCoherent();
     if (needToExit)
         jscExit(EXIT_SUCCESS);

Modified: releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.cpp (189710 => 189711)


--- releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.cpp	2015-09-14 11:11:43 UTC (rev 189710)
+++ releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.cpp	2015-09-14 12:00:47 UTC (rev 189711)
@@ -38,6 +38,7 @@
 #include <wtf/PageBlock.h>
 #include <wtf/StdLibExtras.h>
 #include <wtf/StringExtras.h>
+#include <wtf/text/StringBuilder.h>
 
 #if OS(DARWIN) && ENABLE(PARALLEL_GC)
 #include <sys/sysctl.h>
@@ -84,6 +85,8 @@
 
 static bool parse(const char* string, const char*& value)
 {
+    if (!strlen(string))
+        string = nullptr;
     value = string;
     return true;
 }
@@ -149,6 +152,8 @@
 #endif
 }
 
+const char* const OptionRange::s_nullRangeStr = "<null>";
+
 bool OptionRange::init(const char* rangeString)
 {
     // rangeString should be in the form of [!]<low>[:<high>]
@@ -156,14 +161,16 @@
 
     bool invert = false;
 
-    if (m_state > Uninitialized)
-        return true;
-
     if (!rangeString) {
         m_state = InitError;
         return false;
     }
 
+    if (!strcmp(rangeString, s_nullRangeStr)) {
+        m_state = Uninitialized;
+        return true;
+    }
+    
     m_rangeString = rangeString;
 
     if (*rangeString == '!') {
@@ -360,30 +367,100 @@
             ASSERT(Options::thresholdForOptimizeAfterWarmUp() >= Options::thresholdForOptimizeSoon());
             ASSERT(Options::thresholdForOptimizeAfterWarmUp() >= 0);
 
-            if (Options::showOptions()) {
-                DumpLevel level = static_cast<DumpLevel>(Options::showOptions());
-                if (level > DumpLevel::Verbose)
-                    level = DumpLevel::Verbose;
+            dumpOptionsIfNeeded();
+            ensureOptionsAreCoherent();
+        });
+}
 
-                const char* title = nullptr;
-                switch (level) {
-                case DumpLevel::None:
-                    break;
-                case DumpLevel::Overridden:
-                    title = "Overridden JSC options:";
-                    break;
-                case DumpLevel::All:
-                    title = "All JSC options:";
-                    break;
-                case DumpLevel::Verbose:
-                    title = "All JSC options with descriptions:";
-                    break;
-                }
-                dumpAllOptions(level, title);
+void Options::dumpOptionsIfNeeded()
+{
+    if (Options::showOptions()) {
+        DumpLevel level = static_cast<DumpLevel>(Options::showOptions());
+        if (level > DumpLevel::Verbose)
+            level = DumpLevel::Verbose;
+            
+        const char* title = nullptr;
+        switch (level) {
+        case DumpLevel::None:
+            break;
+        case DumpLevel::Overridden:
+            title = "Overridden JSC options:";
+            break;
+        case DumpLevel::All:
+            title = "All JSC options:";
+            break;
+        case DumpLevel::Verbose:
+            title = "All JSC options with descriptions:";
+            break;
+        }
+
+        StringBuilder builder;
+        dumpAllOptions(builder, level, title, nullptr, "   ", "\n", ShowDefaults);
+        dataLog(builder.toString());
+    }
+}
+
+bool Options::setOptions(const char* optionsStr)
+{
+    Vector<char*> options;
+
+    size_t length = strlen(optionsStr);
+    char* optionsStrCopy = WTF::fastStrDup(optionsStr);
+    char* end = optionsStrCopy + length;
+    char* p = optionsStrCopy;
+
+    while (p < end) {
+        char* optionStart = p;
+        p = strstr(p, "=");
+        if (!p) {
+            dataLogF("'=' not found in option string: %p\n", optionStart);
+            return false;
+        }
+        p++;
+
+        char* valueBegin = p;
+        bool hasStringValue = false;
+        const int minStringLength = 2; // The min is an empty string i.e. 2 double quotes.
+        if ((p + minStringLength < end) && (*p == '"')) {
+            p = strstr(p + 1, "\"");
+            if (!p) {
+                dataLogF("Missing trailing '\"' in option string: %p\n", optionStart);
+                return false; // End of string not found.
             }
+            hasStringValue = true;
+        }
 
-            ensureOptionsAreCoherent();
-        });
+        p = strstr(p, " ");
+        if (!p)
+            p = end; // No more " " separator. Hence, this is the last arg.
+
+        // If we have a well-formed string value, strip the quotes.
+        if (hasStringValue) {
+            char* valueEnd = p;
+            ASSERT((*valueBegin == '"') && ((valueEnd - valueBegin) >= minStringLength) && (valueEnd[-1] == '"'));
+            memmove(valueBegin, valueBegin + 1, valueEnd - valueBegin - minStringLength);
+            valueEnd[-minStringLength] = '\0';
+        }
+
+        // Strip leading -- if present.
+        if ((p -  optionStart > 2) && optionStart[0] == '-' && optionStart[1] == '-')
+            optionStart += 2;
+
+        *p++ = '\0';
+        options.append(optionStart);
+    }
+
+    bool success = true;
+    for (auto& option : options) {
+        bool optionSuccess = setOption(option);
+        if (!optionSuccess) {
+            dataLogF("Failed to set option : %s\n", option);
+            success = false;
+        }
+    }
+
+    dumpOptionsIfNeeded();
+    return success;
 }
 
 // Parses a single command line option in the format "<optionName>=<value>"
@@ -420,16 +497,36 @@
     return false; // No option matched.
 }
 
-void Options::dumpAllOptions(DumpLevel level, const char* title, FILE* stream)
+void Options::dumpAllOptions(StringBuilder& builder, DumpLevel level, const char* title,
+    const char* separator, const char* optionHeader, const char* optionFooter, ShowDefaultsOption showDefaultsOption)
 {
-    if (title)
-        fprintf(stream, "%s\n", title);
-    for (int id = 0; id < numberOfOptions; id++)
-        dumpOption(level, static_cast<OptionID>(id), stream, "   ", "\n");
+    if (title) {
+        builder.append(title);
+        builder.append('\n');
+    }
+
+    for (int id = 0; id < numberOfOptions; id++) {
+        if (separator && id)
+            builder.append(separator);
+        dumpOption(builder, level, static_cast<OptionID>(id), optionHeader, optionFooter, showDefaultsOption);
+    }
 }
 
-void Options::dumpOption(DumpLevel level, OptionID id, FILE* stream, const char* header, const char* footer)
+void Options::dumpAllOptionsInALine(StringBuilder& builder)
 {
+    dumpAllOptions(builder, DumpLevel::All, nullptr, " ", nullptr, nullptr, DontShowDefaults);
+}
+
+void Options::dumpAllOptions(FILE* stream, DumpLevel level, const char* title)
+{
+    StringBuilder builder;
+    dumpAllOptions(builder, level, title, nullptr, "   ", "\n", ShowDefaults);
+    fprintf(stream, "%s", builder.toString().ascii().data());
+}
+
+void Options::dumpOption(StringBuilder& builder, DumpLevel level, OptionID id,
+    const char* header, const char* footer, ShowDefaultsOption showDefaultsOption)
+{
     if (id >= numberOfOptions)
         return; // Illegal option.
 
@@ -440,19 +537,24 @@
     if (level == DumpLevel::Overridden && !wasOverridden)
         return;
 
-    fprintf(stream, "%s%s: ", header, option.name());
-    option.dump(stream);
+    if (header)
+        builder.append(header);
+    builder.append(option.name());
+    builder.append('=');
+    option.dump(builder);
 
-    if (wasOverridden) {
-        fprintf(stream, " (default: ");
-        option.defaultOption().dump(stream);
-        fprintf(stream, ")");
+    if (wasOverridden && (showDefaultsOption == ShowDefaults)) {
+        builder.append(" (default: ");
+        option.defaultOption().dump(builder);
+        builder.append(")");
     }
 
-    if (needsDescription)
-        fprintf(stream, "   ... %s", option.description());
+    if (needsDescription) {
+        builder.append("   ... ");
+        builder.append(option.description());
+    }
 
-    fprintf(stream, "%s", footer);
+    builder.append(footer);
 }
 
 void Options::ensureOptionsAreCoherent()
@@ -466,33 +568,35 @@
         CRASH();
 }
 
-void Option::dump(FILE* stream) const
+void Option::dump(StringBuilder& builder) const
 {
     switch (type()) {
     case Options::Type::boolType:
-        fprintf(stream, "%s", m_entry.boolVal ? "true" : "false");
+        builder.append(m_entry.boolVal ? "true" : "false");
         break;
     case Options::Type::unsignedType:
-        fprintf(stream, "%u", m_entry.unsignedVal);
+        builder.appendNumber(m_entry.unsignedVal);
         break;
     case Options::Type::doubleType:
-        fprintf(stream, "%lf", m_entry.doubleVal);
+        builder.appendNumber(m_entry.doubleVal);
         break;
     case Options::Type::int32Type:
-        fprintf(stream, "%d", m_entry.int32Val);
+        builder.appendNumber(m_entry.int32Val);
         break;
     case Options::Type::optionRangeType:
-        fprintf(stream, "%s", m_entry.optionRangeVal.rangeString());
+        builder.append(m_entry.optionRangeVal.rangeString());
         break;
     case Options::Type::optionStringType: {
         const char* option = m_entry.optionStringVal;
         if (!option)
             option = "";
-        fprintf(stream, "%s", option);
+        builder.append('"');
+        builder.append(option);
+        builder.append('"');
         break;
     }
     case Options::Type::gcLogLevelType: {
-        fprintf(stream, "%s", GCLogging::levelAsString(m_entry.gcLogLevelVal));
+        builder.append(GCLogging::levelAsString(m_entry.gcLogLevelVal));
         break;
     }
     }

Modified: releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.h (189710 => 189711)


--- releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.h	2015-09-14 11:11:43 UTC (rev 189710)
+++ releases/WebKitGTK/webkit-2.10/Source/_javascript_Core/runtime/Options.h	2015-09-14 12:00:47 UTC (rev 189711)
@@ -33,6 +33,11 @@
 #include <wtf/PrintStream.h>
 #include <wtf/StdLibExtras.h>
 
+namespace WTF {
+class StringBuilder;
+}
+using WTF::StringBuilder;
+
 namespace JSC {
 
 // How do JSC VM options work?
@@ -80,11 +85,13 @@
 
     bool init(const char*);
     bool isInRange(unsigned);
-    const char* rangeString() const { return (m_state > InitError) ? m_rangeString : "<null>"; }
+    const char* rangeString() const { return (m_state > InitError) ? m_rangeString : s_nullRangeStr; }
     
     void dump(PrintStream& out) const;
 
 private:
+    static const char* const s_nullRangeStr;
+
     RangeState m_state;
     const char* m_rangeString;
     unsigned m_lowLimit;
@@ -359,11 +366,17 @@
 
     JS_EXPORT_PRIVATE static void initialize();
 
+    // Parses a string of options where each option is of the format "--<optionName>=<value>"
+    // and are separated by a space. The leading "--" is optional and will be ignored.
+    JS_EXPORT_PRIVATE static bool setOptions(const char* optionsList);
+
     // Parses a single command line option in the format "<optionName>=<value>"
     // (no spaces allowed) and set the specified option if appropriate.
     JS_EXPORT_PRIVATE static bool setOption(const char* arg);
-    JS_EXPORT_PRIVATE static void dumpAllOptions(DumpLevel, const char* title = nullptr, FILE* stream = stdout);
-    static void dumpOption(DumpLevel, OptionID, FILE* stream = stdout, const char* header = "", const char* footer = "");
+
+    JS_EXPORT_PRIVATE static void dumpAllOptions(FILE*, DumpLevel, const char* title = nullptr);
+    JS_EXPORT_PRIVATE static void dumpAllOptionsInALine(StringBuilder&);
+
     JS_EXPORT_PRIVATE static void ensureOptionsAreCoherent();
 
     // Declare accessors for each option:
@@ -395,6 +408,16 @@
 
     Options();
 
+    enum ShowDefaultsOption {
+        DontShowDefaults,
+        ShowDefaults
+    };
+    static void dumpOptionsIfNeeded();
+    static void dumpAllOptions(StringBuilder&, DumpLevel, const char* title,
+        const char* separator, const char* optionHeader, const char* optionFooter, ShowDefaultsOption);
+    static void dumpOption(StringBuilder&, DumpLevel, OptionID,
+        const char* optionHeader, const char* optionFooter, ShowDefaultsOption);
+
     // Declare the singleton instance of the options store:
     JS_EXPORTDATA static Entry s_options[numberOfOptions];
     static Entry s_defaultOptions[numberOfOptions];
@@ -411,7 +434,8 @@
     {
     }
     
-    void dump(FILE*) const;
+    void dump(StringBuilder&) const;
+
     bool operator==(const Option& other) const;
     bool operator!=(const Option& other) const { return !(*this == other); }
     
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