early-access version 1432

externals/ffmpeg/tools/coverity.c

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+/* Coverity Scan model
+*
+* Copyright (C) 2014 Red Hat, Inc.
+*
+* Authors:
+* Markus Armbruster <armbru@redhat.com>
+* Paolo Bonzini <pbonzini@redhat.com>
+*
+* This work is licensed under the terms of the GNU GPL, version 2 or, at your
+* option, any later version. See the COPYING file in the top-level directory.
+*/
+/*
+* This is the source code for our Coverity user model file. The
+* purpose of user models is to increase scanning accuracy by explaining
+* code Coverity can't see (out of tree libraries) or doesn't
+* sufficiently understand. Better accuracy means both fewer false
+* positives and more true defects. Memory leaks in particular.
+*
+* - A model file can't import any header files. Some built-in primitives are
+* available but not wchar_t, NULL etc.
+* - Modeling doesn't need full structs and typedefs. Rudimentary structs
+* and similar types are sufficient.
+* - An uninitialized local variable signifies that the variable could be
+* any value.
+*
+* The model file must be uploaded by an admin in the analysis settings of
+* https://scan.coverity.com/projects/54
+*
+* above text is based on https://github.com/qemu/qemu/blob/master/scripts/coverity-model.c
+*/
+
+#define NULL (void *)0
+
+// Based on https://scan.coverity.com/models
+void *av_malloc(size_t size) {
+    int has_memory;
+    __coverity_negative_sink__(size);
+    if (has_memory) {
+        void *ptr = __coverity_alloc__(size);
+        __coverity_mark_as_uninitialized_buffer__(ptr);
+        __coverity_mark_as_afm_allocated__(ptr, "av_free");
+         return ptr;
+    } else {
+        return 0;
+    }
+}
+
+void *av_mallocz(size_t size) {
+    int has_memory;
+    __coverity_negative_sink__(size);
+    if (has_memory) {
+        void *ptr = __coverity_alloc__(size);
+        __coverity_writeall0__(ptr);
+        __coverity_mark_as_afm_allocated__(ptr, "av_free");
+        return ptr;
+    } else {
+        return 0;
+    }
+}
+
+void *av_realloc(void *ptr, size_t size) {
+    int has_memory;
+    __coverity_negative_sink__(size);
+    if (has_memory) {
+        __coverity_escape__(ptr);
+        ptr = __coverity_alloc__(size);
+        __coverity_writeall__(ptr);
+        __coverity_mark_as_afm_allocated__(ptr, "av_free");
+        return ptr;
+    } else {
+        return 0;
+    }
+}
+
+void *av_free(void *ptr) {
+    __coverity_free__(ptr);
+    __coverity_mark_as_afm_freed__(ptr, "av_free");
+}
+