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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/161169">161169</a></dd>
<dt>Author</dt> <dd>mark.lam@apple.com</dd>
<dt>Date</dt> <dd>2013-12-30 21:18:42 -0800 (Mon, 30 Dec 2013)</dd>
</dl>
<h3>Log Message</h3>
<pre>CStack: Introducing Options::maxStackSize().
https://bugs.webkit.org/show_bug.cgi?id=126321.
Not yet reviewed.
We need an option to limit the JS stack size. Currently, we just change
the JSStack class to use this limit.
* interpreter/JSStack.cpp:
(JSC::JSStack::JSStack):
* interpreter/JSStack.h:
* runtime/Options.h:</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchesjsCStackSourceJavaScriptCoreChangeLog">branches/jsCStack/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoreinterpreterJSStackcpp">branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.cpp</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoreinterpreterJSStackh">branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.h</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoreruntimeOptionsh">branches/jsCStack/Source/JavaScriptCore/runtime/Options.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchesjsCStackSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/ChangeLog (161168 => 161169)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/ChangeLog 2013-12-31 04:46:02 UTC (rev 161168)
+++ branches/jsCStack/Source/JavaScriptCore/ChangeLog 2013-12-31 05:18:42 UTC (rev 161169)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2013-12-30 Mark Lam <mark.lam@apple.com>
+
+ CStack: Introducing Options::maxStackSize().
+ https://bugs.webkit.org/show_bug.cgi?id=126321.
+
+ Not yet reviewed.
+
+ We need an option to limit the JS stack size. Currently, we just change
+ the JSStack class to use this limit.
+
+ * interpreter/JSStack.cpp:
+ (JSC::JSStack::JSStack):
+ * interpreter/JSStack.h:
+ * runtime/Options.h:
+
</ins><span class="cx"> 2013-12-29 Filip Pizlo <fpizlo@apple.com>
</span><span class="cx">
</span><span class="cx"> CStack branch with --ftl-jit should fail no more tests than without FTL as of r161113
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoreinterpreterJSStackcpp"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.cpp (161168 => 161169)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.cpp 2013-12-31 04:46:02 UTC (rev 161168)
+++ branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.cpp 2013-12-31 05:18:42 UTC (rev 161169)
</span><span class="lines">@@ -53,10 +53,10 @@
</span><span class="cx"> #endif
</span><span class="cx"> {
</span><span class="cx"> #if ENABLE(LLINT_C_LOOP)
</span><del>- size_t capacity = defaultCapacity;
</del><ins>+ size_t capacity = Options::maxStackSize();
</ins><span class="cx"> ASSERT(capacity && isPageAligned(capacity));
</span><span class="cx">
</span><del>- m_reservation = PageReservation::reserve(roundUpAllocationSize(capacity * sizeof(Register), commitSize), OSAllocator::JSVMStackPages);
</del><ins>+ m_reservation = PageReservation::reserve(roundUpAllocationSize(capacity, commitSize), OSAllocator::JSVMStackPages);
</ins><span class="cx"> setStackLimit(highAddress());
</span><span class="cx"> m_commitTop = highAddress();
</span><span class="cx">
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoreinterpreterJSStackh"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.h (161168 => 161169)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.h 2013-12-31 04:46:02 UTC (rev 161168)
+++ branches/jsCStack/Source/JavaScriptCore/interpreter/JSStack.h 2013-12-31 05:18:42 UTC (rev 161169)
</span><span class="lines">@@ -75,7 +75,6 @@
</span><span class="cx"> FirstArgument,
</span><span class="cx"> };
</span><span class="cx">
</span><del>- static const size_t defaultCapacity = 512 * 1024;
</del><span class="cx"> static const size_t commitSize = 16 * 1024;
</span><span class="cx"> // Allow 8k of excess registers before we start trying to reap the stack
</span><span class="cx"> static const ptrdiff_t maxExcessCapacity = 8 * 1024;
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoreruntimeOptionsh"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/runtime/Options.h (161168 => 161169)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/runtime/Options.h 2013-12-31 04:46:02 UTC (rev 161168)
+++ branches/jsCStack/Source/JavaScriptCore/runtime/Options.h 2013-12-31 05:18:42 UTC (rev 161169)
</span><span class="lines">@@ -29,6 +29,7 @@
</span><span class="cx"> #include "JSExportMacros.h"
</span><span class="cx"> #include <stdint.h>
</span><span class="cx"> #include <stdio.h>
</span><ins>+#include <wtf/StdLibExtras.h>
</ins><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><span class="lines">@@ -94,6 +95,8 @@
</span><span class="cx"> v(bool, useDFGJIT, true) \
</span><span class="cx"> v(bool, useRegExpJIT, true) \
</span><span class="cx"> \
</span><ins>+ v(unsigned, maxStackSize, 4 * MB) \
+ \
</ins><span class="cx"> v(bool, crashIfCantAllocateJITMemory, false) \
</span><span class="cx"> \
</span><span class="cx"> v(bool, forceDFGCodeBlockLiveness, false) \
</span></span></pre>
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