error: ensure errno detail is printed with error_abort

When &error_abort is passed in, the error reporting code will print the current error message and then abort() the process. Unfortunately at the time it aborts, we've not yet appended the errno detail. This makes debugging certain problems significantly harder as the log is incomplete. Signed-off-by: Daniel P. Berrange <[email protected]> Message-Id: <[email protected]> Signed-off-by: Markus Armbruster <[email protected]>
ntavares · Mar 16, 2016 · 20e2dec · 20e2dec
1 parent a6cdb77
commit 20e2dec
Showing 1 changed file with 19 additions and 21 deletions.
diff --git a/util/error.c b/util/error.c
@@ -44,7 +44,8 @@ static void error_handle_fatal(Error **errp, Error *err)
 
 static void error_setv(Error **errp,
                        const char *src, int line, const char *func,
-                       ErrorClass err_class, const char *fmt, va_list ap)
+                       ErrorClass err_class, const char *fmt, va_list ap,
+                       const char *suffix)
 {
     Error *err;
     int saved_errno = errno;
@@ -56,6 +57,11 @@ static void error_setv(Error **errp,
 
     err = g_malloc0(sizeof(*err));
     err->msg = g_strdup_vprintf(fmt, ap);
+    if (suffix) {
+        char *msg = err->msg;
+        err->msg = g_strdup_printf("%s: %s", msg, suffix);
+        g_free(msg);
+    }
     err->err_class = err_class;
     err->src = src;
     err->line = line;
@@ -74,7 +80,7 @@ void error_set_internal(Error **errp,
     va_list ap;
 
     va_start(ap, fmt);
-    error_setv(errp, src, line, func, err_class, fmt, ap);
+    error_setv(errp, src, line, func, err_class, fmt, ap, NULL);
     va_end(ap);
 }
 
@@ -85,7 +91,7 @@ void error_setg_internal(Error **errp,
     va_list ap;
 
     va_start(ap, fmt);
-    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap);
+    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap, NULL);
     va_end(ap);
 }
 
@@ -94,23 +100,17 @@ void error_setg_errno_internal(Error **errp,
                                int os_errno, const char *fmt, ...)
 {
     va_list ap;
-    char *msg;
     int saved_errno = errno;
 
     if (errp == NULL) {
         return;
     }
 
     va_start(ap, fmt);
-    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap);
+    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap,
+               os_errno != 0 ? strerror(os_errno) : NULL);
     va_end(ap);
 
-    if (os_errno != 0) {
-        msg = (*errp)->msg;
-        (*errp)->msg = g_strdup_printf("%s: %s", msg, strerror(os_errno));
-        g_free(msg);
-    }
-
     errno = saved_errno;
 }
 
@@ -174,24 +174,22 @@ void error_setg_win32_internal(Error **errp,
                                int win32_err, const char *fmt, ...)
 {
     va_list ap;
-    char *msg1, *msg2;
+    char *suffix = NULL;
 
     if (errp == NULL) {
         return;
     }
 
+    if (win32_err != 0) {
+        suffix = g_win32_error_message(win32_err);
+    }
+
     va_start(ap, fmt);
-    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap);
+    error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR,
+               fmt, ap, suffix);
     va_end(ap);
 
-    if (win32_err != 0) {
-        msg1 = (*errp)->msg;
-        msg2 = g_win32_error_message(win32_err);
-        (*errp)->msg = g_strdup_printf("%s: %s (error: %x)", msg1, msg2,
-                                       (unsigned)win32_err);
-        g_free(msg2);
-        g_free(msg1);
-    }
+    g_free(suffix);
 }
 
 #endif