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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ARM] REGRESSION(r203786): jit.m_assembler.buffer().codeSize() <= static_cast<size_t>(m_inlineSize)"
href="https://bugs.webkit.org/show_bug.cgi?id=160291">160291</a>
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<th>Summary</th>
<td>[ARM] REGRESSION(r203786): jit.m_assembler.buffer().codeSize() <= static_cast<size_t>(m_inlineSize)
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>Other
</td>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Critical
</td>
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<th>Priority</th>
<td>P1
</td>
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<tr>
<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
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<th>Reporter</th>
<td>ossy@webkit.org
</td>
</tr>
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<th>CC</th>
<td>mark.lam@apple.com, sbarati@apple.com
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</tr>
<tr>
<th>Blocks</th>
<td>108645, 160110
</td>
</tr></table>
<p>
<div>
<pre><a href="https://trac.webkit.org/changeset/203786">https://trac.webkit.org/changeset/203786</a> changed the IC code and made zillion tests assert/crash again. :(
Before r203786, almost all tests passed with the patch in <a class="bz_bug_link
bz_status_NEW "
title="NEW - [ARM] ASSERTION FAILED: linkBuffer.isValid() in InlineAccess.cpp:291 after r202214 and r203537"
href="show_bug.cgi?id=159720">https://bugs.webkit.org/show_bug.cgi?id=159720</a> .
But after r203786 I got the following assert:
ASSERTION FAILED: jit.m_assembler.buffer().codeSize() <= static_cast<size_t>(m_inlineSize)
../../Source/JavaScriptCore/jit/JITMathIC.h(135) : JSC::JITMathIC<Generator>::generateOutOfLine(JSC::VM&, JSC::CodeBlock*, JSC::FunctionPtr)::<lambda()> [with GeneratorType = JSC::JITAddGenerator]
1 0xb64318e0 WTFCrash
2 0xb5f3efb8 JSC::JITMathIC<JSC::JITAddGenerator>::generateOutOfLine(JSC::VM&, JSC::CodeBlock*, JSC::FunctionPtr)::{lambda()#1}::operator()() const
3 0xb5f3f438 JSC::JITMathIC<JSC::JITAddGenerator>::generateOutOfLine(JSC::VM&, JSC::CodeBlock*, JSC::FunctionPtr)
4 0xb5f35d1c
Segmentation fault
---
jit.m_assembler.buffer().codeSize() = 12
static_cast<size_t>(m_inlineSize) = 4
Could you give me some hint what changed here?
Why isn't there enough space to use ldr + b + immediate (12 bytes) for jump?
Could you share me how long will you work refactoring this IC thing?
I won't have time to fix new and new regressions every day. Maybe I
simply let ARMAssembler completely broken until you finish this
development, and then try to debug all regression. Maybe let it
broken forever, who knows.</pre>
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