From: Tim Wiederhake <twiederh@redhat.com>
Date: Thu, 6 May 2021 15:08:32 +0000 (+0200)
Subject: meson: Allow larger stack frames when instrumenting
X-Git-Tag: v7.5.0-rc1~151
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c46556c2809362b8771201bf4c8d0d4feebf2ab0;p=thirdparty%2Flibvirt.git

meson: Allow larger stack frames when instrumenting

When enabling sanitizers, gcc adds some instrumentation to the code
that may enlarge stack frames. Some function's stack frames are already
close to the limit of 4096 and are enlarged past that threshold,
e.g. virLXCProcessStart which reaches a frame size of 4624 bytes.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
---

diff --git a/meson.build b/meson.build
index 40e99fec0c..5849975a72 100644
--- a/meson.build
+++ b/meson.build
@@ -224,6 +224,9 @@ alloc_max = run_command(
   'print(min(2**(@0@ * 8 - 1) - 1, 2**(@1@ * 8) - 1))'.format(ptrdiff_max, size_max),
 )
 
+# sanitizer instrumentation may enlarge stack frames
+stack_frame_size = get_option('b_sanitize') == 'none' ? 4096 : 8192
+
 cc_flags += [
   '-fasynchronous-unwind-tables',
   '-fexceptions',
@@ -279,7 +282,7 @@ cc_flags += [
   '-Wformat-y2k',
   '-Wformat-zero-length',
   '-Wframe-address',
-  '-Wframe-larger-than=4096',
+  '-Wframe-larger-than=@0@'.format(stack_frame_size),
   '-Wfree-nonheap-object',
   '-Whsa',
   '-Wif-not-aligned',