[spice-common 8/8] log: Let gcc know about the logging macros which abort

[Christophe Fergeau <cfergeau@xxxxxxxxxx>]

The for(;;) hack was taken from glib's logging macros.

Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
---
 common/log.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/common/log.h b/common/log.h
index 7c67e7a..b397306 100644
--- a/common/log.h
+++ b/common/log.h
@@ -20,6 +20,7 @@
 
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <glib.h>
 #include <spice/macros.h>
 
@@ -42,6 +43,7 @@ void spice_log(GLogLevelFlags log_level,
 #define spice_return_if_fail(x) G_STMT_START {                          \
     if G_LIKELY(x) { } else {                                           \
         spice_log(G_LOG_LEVEL_CRITICAL, SPICE_STRLOC, G_STRFUNC, "condition `%s' failed", #x); \
+        abort();                                                                               \
         return;                                                         \
     }                                                                   \
 } G_STMT_END
@@ -49,6 +51,7 @@ void spice_log(GLogLevelFlags log_level,
 #define spice_return_val_if_fail(x, val) G_STMT_START {                 \
     if G_LIKELY(x) { } else {                                           \
         spice_log(G_LOG_LEVEL_CRITICAL, SPICE_STRLOC, __FUNCTION__, "condition `%s' failed", #x); \
+        abort();                                                                                  \
         return (val);                                                   \
     }                                                                   \
 } G_STMT_END
@@ -69,12 +72,17 @@ void spice_log(GLogLevelFlags log_level,
     spice_log(G_LOG_LEVEL_WARNING, SPICE_STRLOC, __FUNCTION__, "" format, ## __VA_ARGS__); \
 } G_STMT_END
 
+/* for(;;) ; so that GCC knows that control doesn't go past g_error().
+ * Put space before ending semicolon to avoid C++ build warnings.
+ */
 #define spice_critical(format, ...) G_STMT_START {                          \
     spice_log(G_LOG_LEVEL_CRITICAL, SPICE_STRLOC, __FUNCTION__, "" format, ## __VA_ARGS__); \
+    for (;;) ;                                                                              \
 } G_STMT_END
 
 #define spice_error(format, ...) G_STMT_START {                         \
     spice_log(G_LOG_LEVEL_ERROR, SPICE_STRLOC, __FUNCTION__, "" format, ## __VA_ARGS__); \
+    for (;;) ;                                                                              \
 } G_STMT_END
 
 #define spice_warn_if_fail(x) G_STMT_START {            \
-- 
2.21.0

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