blob: 19a132a9767a2cbc2c405b4c70caddc2646ce121
| 1 | /* Coverity Scan model |
| 2 | * |
| 3 | * Copyright (C) 2014 Red Hat, Inc. |
| 4 | * |
| 5 | * Authors: |
| 6 | * Markus Armbruster <armbru@redhat.com> |
| 7 | * Paolo Bonzini <pbonzini@redhat.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or, at your |
| 10 | * option, any later version. See the COPYING file in the top-level directory. |
| 11 | */ |
| 12 | /* |
| 13 | * This is the source code for our Coverity user model file. The |
| 14 | * purpose of user models is to increase scanning accuracy by explaining |
| 15 | * code Coverity can't see (out of tree libraries) or doesn't |
| 16 | * sufficiently understand. Better accuracy means both fewer false |
| 17 | * positives and more true defects. Memory leaks in particular. |
| 18 | * |
| 19 | * - A model file can't import any header files. Some built-in primitives are |
| 20 | * available but not wchar_t, NULL etc. |
| 21 | * - Modeling doesn't need full structs and typedefs. Rudimentary structs |
| 22 | * and similar types are sufficient. |
| 23 | * - An uninitialized local variable signifies that the variable could be |
| 24 | * any value. |
| 25 | * |
| 26 | * The model file must be uploaded by an admin in the analysis settings of |
| 27 | * https://scan.coverity.com/projects/54 |
| 28 | * |
| 29 | * above text is based on https://github.com/qemu/qemu/blob/master/scripts/coverity-model.c |
| 30 | */ |
| 31 | |
| 32 | #define NULL (void *)0 |
| 33 | |
| 34 | // Based on https://scan.coverity.com/models |
| 35 | void *av_malloc(size_t size) { |
| 36 | int has_memory; |
| 37 | __coverity_negative_sink__(size); |
| 38 | if (has_memory) { |
| 39 | void *ptr = __coverity_alloc__(size); |
| 40 | __coverity_mark_as_uninitialized_buffer__(ptr); |
| 41 | __coverity_mark_as_afm_allocated__(ptr, "av_free"); |
| 42 | return ptr; |
| 43 | } else { |
| 44 | return 0; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | void *av_mallocz(size_t size) { |
| 49 | int has_memory; |
| 50 | __coverity_negative_sink__(size); |
| 51 | if (has_memory) { |
| 52 | void *ptr = __coverity_alloc__(size); |
| 53 | __coverity_writeall0__(ptr); |
| 54 | __coverity_mark_as_afm_allocated__(ptr, "av_free"); |
| 55 | return ptr; |
| 56 | } else { |
| 57 | return 0; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | void *av_realloc(void *ptr, size_t size) { |
| 62 | int has_memory; |
| 63 | __coverity_negative_sink__(size); |
| 64 | if (has_memory) { |
| 65 | __coverity_escape__(ptr); |
| 66 | ptr = __coverity_alloc__(size); |
| 67 | __coverity_writeall__(ptr); |
| 68 | __coverity_mark_as_afm_allocated__(ptr, "av_free"); |
| 69 | return ptr; |
| 70 | } else { |
| 71 | return 0; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | void *av_free(void *ptr) { |
| 76 | __coverity_free__(ptr); |
| 77 | __coverity_mark_as_afm_freed__(ptr, "av_free"); |
| 78 | } |
| 79 | |
| 80 |