From 4a332d01186b09a9d46390b845024d914d9149cb Mon Sep 17 00:00:00 2001
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From: Michel Alexandre Salim <michel@michel-slm.name>
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Date: Sun, 21 Mar 2021 13:17:00 -0700
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Subject: [PATCH] Fix for non-constant SIGSTKSZ
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On glibc > 2.33, `SIGSTKSZ` might not be constant (in which case
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it expands to a call to `sysconf` which returns a `long int`); see
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http://sourceware-org.1504.n7.nabble.com/PATCH-sysconf-Add-SC-MINSIGSTKSZ-SC-SIGSTKSZ-BZ-20305-td650948.html
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Cast the two arguments to `max` to `unsigned`, which is the type of the variable
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we're storing the result in anyway, so that it works both with the old-style constant
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`SIGSTKSZ` and the new configurable one.
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Signed-off-by: Michel Alexandre Salim <michel@michel-slm.name>
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Change-Id: I3d87048561a87c6b9fcdbb14b3d53dd45b0a00f0
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[Retrieved from:
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https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2776379]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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diff --git a/src/client/linux/handler/exception_handler.cc b/src/client/linux/handler/exception_handler.cc
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index ca353c4..3788829 100644
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--- a/src/client/linux/handler/exception_handler.cc
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+++ b/src/client/linux/handler/exception_handler.cc
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@@ -138,7 +138,7 @@
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// SIGSTKSZ may be too small to prevent the signal handlers from overrunning
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// the alternative stack. Ensure that the size of the alternative stack is
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// large enough.
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- static const unsigned kSigStackSize = std::max(16384, SIGSTKSZ);
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+ static const unsigned kSigStackSize = std::max((unsigned) 16384, (unsigned) SIGSTKSZ);
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// Only set an alternative stack if there isn't already one, or if the current
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// one is too small.
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