coverity: Model g_free() isn't necessarily free()

Memory allocated with GLib needs to be freed with GLib.  Freeing it
with free() instead of g_free() is a common error.  Harmless when
g_free() is a trivial wrapper around free(), which is commonly the
case.  But model the difference anyway.

In a local scan, this flags four ALLOC_FREE_MISMATCH.  Requires
--enable ALLOC_FREE_MISMATCH, because the checker is still preview.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Acked-by: NPaolo Bonzini <pbonzini@redhat.com>

scripts/coverity-model.c

@@ -125,7 +125,7 @@ void *g_malloc_n(size_t nmemb, size_t size)
     sz = nmemb * size;
     ptr = __coverity_alloc__(size);
     __coverity_mark_as_uninitialized_buffer__(ptr);
-    __coverity_mark_as_afm_allocated__(ptr, AFM_free);
+    __coverity_mark_as_afm_allocated__(ptr, "g_free");
     return ptr;
 }
 
@@ -139,7 +139,7 @@ void *g_malloc0_n(size_t nmemb, size_t size)
     sz = nmemb * size;
     ptr = __coverity_alloc__(size);
     __coverity_writeall0__(ptr);
-    __coverity_mark_as_afm_allocated__(ptr, AFM_free);
+    __coverity_mark_as_afm_allocated__(ptr, "g_free");
     return ptr;
 }
 
@@ -157,14 +157,14 @@ void *g_realloc_n(void *ptr, size_t nmemb, size_t size)
      * model that.  See Coverity's realloc() model
      */
     __coverity_writeall__(ptr);
-    __coverity_mark_as_afm_allocated__(ptr, AFM_free);
+    __coverity_mark_as_afm_allocated__(ptr, "g_free");
     return ptr;
 }
 
 void g_free(void *ptr)
 {
     __coverity_free__(ptr);
-    __coverity_mark_as_afm_freed__(ptr, AFM_free);
+    __coverity_mark_as_afm_freed__(ptr, "g_free");
 }
 
 /*
@@ -250,7 +250,7 @@ char *g_strdup(const char *s)
     __coverity_string_null_sink__(s);
     __coverity_string_size_sink__(s);
     dup = __coverity_alloc_nosize__();
-    __coverity_mark_as_afm_allocated__(dup, AFM_free);
+    __coverity_mark_as_afm_allocated__(dup, "g_free");
     for (i = 0; (dup[i] = s[i]); i++) ;
     return dup;
 }
@@ -284,7 +284,7 @@ char *g_strdup_printf(const char *format, ...)
 
     s = __coverity_alloc_nosize__();
     __coverity_writeall__(s);
-    __coverity_mark_as_afm_allocated__(s, AFM_free);
+    __coverity_mark_as_afm_allocated__(s, "g_free");
     return s;
 }
 
@@ -301,7 +301,7 @@ char *g_strdup_vprintf(const char *format, va_list ap)
 
     s = __coverity_alloc_nosize__();
     __coverity_writeall__(s);
-    __coverity_mark_as_afm_allocated__(s, AFM_free);
+    __coverity_mark_as_afm_allocated__(s, "g_free");
 
     return len;
 }
@@ -317,7 +317,7 @@ char *g_strconcat(const char *s, ...)
 
     s = __coverity_alloc_nosize__();
     __coverity_writeall__(s);
-    __coverity_mark_as_afm_allocated__(s, AFM_free);
+    __coverity_mark_as_afm_allocated__(s, "g_free");
     return s;
 }