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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [wasm-ld] zlib crash"
href="https://bugs.llvm.org/show_bug.cgi?id=41802">41802</a>
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<th>Summary</th>
<td>[wasm-ld] zlib crash
</td>
</tr>
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>alonzakai@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, peter.smith@linaro.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21911" name="attach_21911" title="all files but libc (too big with it all together)">attachment 21911</a> <a href="attachment.cgi?id=21911&action=edit" title="all files but libc (too big with it all together)">[details]</a></span>
all files but libc (too big with it all together)
This crashes:
wasm-ld src_0.o libz.a libc.bc libc-wasm.bc libdlmalloc.bc libpthreads_stub.bc
libcompiler_rt.a libcompiler_rt_wasm.a libc_rt_wasm.a -mllvm
-combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm
-disable-lsr --export __wasm_call_ctors --export __data_end --export main
--export malloc --export free --export setThrew --export __errno_location
--export fflush -z stack-size=5242880 --initial-memory=16777216 --no-entry
--max-memory=16777216 --global-base=1024 -o src.c.o.wasm --allow-undefined
--import-memory --import-table --lto-O0
and the crash says it is on
lld::wasm::FunctionSymbol::getFunctionIndex()
Valgrind confirms with "Invalid read of size 1" on that function.
Noticed this when working on
<a href="https://github.com/emscripten-core/emscripten/pull/8550">https://github.com/emscripten-core/emscripten/pull/8550</a> , that is, when getting
emscripten to properly test LTO. The attached files are from running
wasmlto0.test_zlib on that PR (specifically
84d61dac52c8a74898bb953916d0f4654348163e).</pre>
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