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Sometimes there is a deadlock between user-requested ccov counters flush (through a signal) and flush happening when a process is dying. So in order to avoid it, just remove the latter which is out of our control (user-requested flushes are protected using a cross mutex). Differential Revision: https://phabricator.services.mozilla.com/D112632
28 lines
854 B
Diff
28 lines
854 B
Diff
From 98bf90ef5ea3dd848ce7d81a662eb7499d11c91c Mon Sep 17 00:00:00 2001
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From: Calixte Denizet <calixte.denizet@gmail.com>
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Date: Fri, 16 Apr 2021 10:05:34 +0200
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Subject: [PATCH] [Gcov] Don't run global destructor in ccov builds when env
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MOZ_FUZZING_CCOV is existing
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---
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compiler-rt/lib/profile/GCDAProfiling.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/compiler-rt/lib/profile/GCDAProfiling.c b/compiler-rt/lib/profile/GCDAProfiling.c
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index 4293e8f7b5bf..6cda4bc7601f 100644
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--- a/compiler-rt/lib/profile/GCDAProfiling.c
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+++ b/compiler-rt/lib/profile/GCDAProfiling.c
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@@ -586,6 +586,9 @@ void llvm_writeout_files(void) {
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__attribute__((destructor(100)))
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#endif
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static void llvm_writeout_and_clear(void) {
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+ if (getenv("MOZ_FUZZING_CCOV")) {
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+ return;
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+ }
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llvm_writeout_files();
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fn_list_remove(&writeout_fn_list);
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}
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--
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2.30.2
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