[Qemu-devel] [PATCH v3 10/20] linux-user: add gcov support to preexit_cleanup

From: "Alex Bennée" <alex.bennee@linaro.org>
To: cota@braap.org, famz@redhat.com, berrange@redhat.com,
	f4bug@amsat.org, richard.henderson@linaro.org, balrogg@gmail.com,
	aurelien@aurel32.net, agraf@suse.de
Cc: pbonzini@redhat.com, qemu-devel@nongnu.org,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Riku Voipio" <riku.voipio@iki.fi>,
	"Laurent Vivier" <laurent@vivier.eu>
Subject: [Qemu-devel] [PATCH v3 10/20] linux-user: add gcov support to preexit_cleanup
Date: Mon,  2 Jul 2018 15:30:11 +0100	[thread overview]
Message-ID: <20180702143021.18864-11-alex.bennee@linaro.org> (raw)
In-Reply-To: <20180702143021.18864-1-alex.bennee@linaro.org>

As we don't always take the normal exit path when running a guest we
can skip the normal exit destructors where gcov normally dumps it's
info. The GCC manual suggests long running programs use __gcov_dump()
to flush out the coverage state periodically so we use that here.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 linux-user/exit.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/linux-user/exit.c b/linux-user/exit.c
index aed8713fae..14e94e28fa 100644
--- a/linux-user/exit.c
+++ b/linux-user/exit.c
@@ -19,10 +19,17 @@
 #include "qemu/osdep.h"
 #include "qemu.h"
 
+#ifdef CONFIG_GCOV
+extern void __gcov_dump(void);
+#endif
+
 void preexit_cleanup(CPUArchState *env, int code)
 {
 #ifdef TARGET_GPROF
         _mcleanup();
+#endif
+#ifdef CONFIG_GCOV
+        __gcov_dump();
 #endif
         gdb_exit(env, code);
 }
-- 
2.17.1
