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<p>p.s. the stackmap format is intended to be transcoded into
whatever internal format you might want. It's not expected to be
a long lived data structure. Given that, the format prioritizes
simplicity over size and efficiency of access. </p>
<p>The format itself is documented here:</p>
<p><a class="moz-txt-link-freetext" href="https://llvm.org/docs/StackMaps.html#stack-map-format">https://llvm.org/docs/StackMaps.html#stack-map-format</a></p>
<br>
<div class="moz-cite-prefix">On 01/13/2018 05:48 PM, River Riddle
via llvm-dev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CANb-1Kkkp-CLSJE=+9K0hahs5ZmHXPGiZroZoNjT+HE7a_fHvA@mail.gmail.com">
<div dir="ltr">Hi,
<div> I implemented a garbage collector for a language I wrote
in college using the llvm gc statepoint infrastructure. <br>
<br>
Information for statepoints:</div>
<div><a href="https://llvm.org/docs/Statepoints.html"
moz-do-not-send="true">https://llvm.org/docs/Statepoints.html</a><br>
<br>
Example usage of parsing the llvm stackmap can be found at:</div>
<div> <a
href="https://github.com/dotnet/llilc/blob/master/lib/GcInfo/GcInfo.cpp"
moz-do-not-send="true">https://github.com/dotnet/llilc/blob/master/lib/GcInfo/GcInfo.cpp</a></div>
<div> <a
href="https://llvm.org/docs/StackMaps.html#stackmap-format"
moz-do-not-send="true">https://llvm.org/docs/StackMaps.html#stackmap-format</a><br>
</div>
<div> <a
href="https://github.com/llvm-mirror/llvm/blob/4604874612fa292ab4c49f96aedefdf8be1ff27e/include/llvm/Object/StackMapParser.h"
moz-do-not-send="true">https://github.com/llvm-mirror/llvm/blob/4604874612fa292ab4c49f96aedefdf8be1ff27e/include/llvm/Object/StackMapParser.h</a><br>
</div>
<div><br>
</div>
<div>Thanks,</div>
<div> River Riddle</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Jan 13, 2018 at 10:02 AM,
benzrf via llvm-dev <span dir="ltr"><<a
href="mailto:llvm-dev@lists.llvm.org" target="_blank"
moz-do-not-send="true">llvm-dev@lists.llvm.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Is there an explanation anywhere of what code
that uses a stack map looks like? I'm interested in
writing a garbage collector, but it's not clear to me how
my code should make use of the stack map format to
actually locate roots in memory.<br>
</div>
<br>
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</blockquote>
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