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<base href="https://bugs.webkit.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] Uninitialized memory use ConservativeRoots"
href="https://bugs.webkit.org/show_bug.cgi?id=159352">159352</a>
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</tr>
<tr>
<th>Summary</th>
<td>[GTK] Uninitialized memory use ConservativeRoots
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Other
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
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<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mcatanzaro@igalia.com
</td>
</tr></table>
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<pre>I found this in a user's valgrind log:
==597== Conditional jump or move depends on uninitialised value(s)
==597== at 0x088268f5: _ZN3JSC17ConservativeRoots14genericAddSpanINS_17CompositeMarkHookEEEvPvS3_RT_ (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0882604c: _ZN3JSC17ConservativeRoots3addEPvS1_RNS_17JITStubRoutineSetERNS_12CodeBlockSetE (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0884a3f9: _ZN3JSC14MachineThreads23gatherConservativeRootsERNS_17ConservativeRootsERNS_17JITStubRoutineSetERNS_12CodeBlockSetEPvS7_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0882b2d0: _ZN3JSC4Heap16gatherStackRootsERNS_17ConservativeRootsEPvS3_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088420b2: _ZN3JSC4Heap9markRootsEdPvS1_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088450d5: _ZN3JSC4Heap11collectImplENS_13HeapOperationEPvS2_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08845387: _ZN3JSC4Heap7collectENS_13HeapOperationE (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08829559: _ZN3JSC18GCActivityCallback6doWorkEv (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088470e1: _ZN3JSC9HeapTimer12timerDidFireEv (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08847118: ??? (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0bbcbc89: g_main_context_dispatch (in /usr/lib/libglib-2.0.so.0.4800.1)
==597== by 0x0bbcc03f: ??? (in /usr/lib/libglib-2.0.so.0.4800.1)
==597==
==597== Use of uninitialised value of size 8
==597== at 0x08826ac6: _ZN3JSC17ConservativeRoots14genericAddSpanINS_17CompositeMarkHookEEEvPvS3_RT_ (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0882604c: _ZN3JSC17ConservativeRoots3addEPvS1_RNS_17JITStubRoutineSetERNS_12CodeBlockSetE (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0884a3f9: _ZN3JSC14MachineThreads23gatherConservativeRootsERNS_17ConservativeRootsERNS_17JITStubRoutineSetERNS_12CodeBlockSetEPvS7_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0882b2d0: _ZN3JSC4Heap16gatherStackRootsERNS_17ConservativeRootsEPvS3_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088420b2: _ZN3JSC4Heap9markRootsEdPvS1_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088450d5: _ZN3JSC4Heap11collectImplENS_13HeapOperationEPvS2_RA1_13__jmp_buf_tag (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08845387: _ZN3JSC4Heap7collectENS_13HeapOperationE (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08829559: _ZN3JSC18GCActivityCallback6doWorkEv (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x088470e1: _ZN3JSC9HeapTimer12timerDidFireEv (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x08847118: ??? (in /usr/lib/libjavascriptcoregtk-4.0.so.18.3.11)
==597== by 0x0bbcbc89: g_main_context_dispatch (in /usr/lib/libglib-2.0.so.0.4800.1)
==597== by 0x0bbcc03f: ??? (in /usr/lib/libglib-2.0.so.0.4800.1)</pre>
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