diff options
Diffstat (limited to 'scripts/coverity-scan/model.c')
| -rw-r--r-- | scripts/coverity-scan/model.c | 227 |
1 files changed, 106 insertions, 121 deletions
diff --git a/scripts/coverity-scan/model.c b/scripts/coverity-scan/model.c index 2c0346ff25..9d4fba53d9 100644 --- a/scripts/coverity-scan/model.c +++ b/scripts/coverity-scan/model.c @@ -45,9 +45,10 @@ typedef struct va_list_str *va_list; /* exec.c */ typedef struct AddressSpace AddressSpace; +typedef struct MemoryRegionCache MemoryRegionCache; typedef uint64_t hwaddr; typedef uint32_t MemTxResult; -typedef uint64_t MemTxAttrs; +typedef struct MemTxAttrs {} MemTxAttrs; static void __bufwrite(uint8_t *buf, ssize_t len) { @@ -67,9 +68,40 @@ static void __bufread(uint8_t *buf, ssize_t len) int last = buf[len-1]; } +MemTxResult address_space_read_cached(MemoryRegionCache *cache, hwaddr addr, + MemTxAttrs attrs, + void *buf, int len) +{ + MemTxResult result; + // TODO: investigate impact of treating reads as producing + // tainted data, with __coverity_tainted_data_argument__(buf). + __bufwrite(buf, len); + return result; +} + +MemTxResult address_space_write_cached(MemoryRegionCache *cache, hwaddr addr, + MemTxAttrs attrs, + const void *buf, int len) +{ + MemTxResult result; + __bufread(buf, len); + return result; +} + +MemTxResult address_space_rw_cached(MemoryRegionCache *cache, hwaddr addr, + MemTxAttrs attrs, + void *buf, int len, bool is_write) +{ + if (is_write) { + return address_space_write_cached(cache, addr, attrs, buf, len); + } else { + return address_space_read_cached(cache, addr, attrs, buf, len); + } +} + MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, - uint8_t *buf, int len) + void *buf, int len) { MemTxResult result; // TODO: investigate impact of treating reads as producing @@ -80,13 +112,23 @@ MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxResult address_space_write(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, - const uint8_t *buf, int len) + const void *buf, int len) { MemTxResult result; __bufread(buf, len); return result; } +MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, + MemTxAttrs attrs, + void *buf, int len, bool is_write) +{ + if (is_write) { + return address_space_write(as, addr, attrs, buf, len); + } else { + return address_space_read(as, addr, attrs, buf, len); + } +} /* Tainting */ @@ -136,54 +178,56 @@ uint8_t replay_get_byte(void) void *g_malloc_n(size_t nmemb, size_t size) { - size_t sz; void *ptr; __coverity_negative_sink__(nmemb); __coverity_negative_sink__(size); - sz = nmemb * size; - ptr = __coverity_alloc__(sz); + ptr = __coverity_alloc__(nmemb * size); + if (!ptr) { + __coverity_panic__(); + } __coverity_mark_as_uninitialized_buffer__(ptr); - __coverity_mark_as_afm_allocated__(ptr, "g_free"); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); return ptr; } void *g_malloc0_n(size_t nmemb, size_t size) { - size_t sz; void *ptr; __coverity_negative_sink__(nmemb); __coverity_negative_sink__(size); - sz = nmemb * size; - ptr = __coverity_alloc__(sz); + ptr = __coverity_alloc__(nmemb * size); + if (!ptr) { + __coverity_panic__(); + } __coverity_writeall0__(ptr); - __coverity_mark_as_afm_allocated__(ptr, "g_free"); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); return ptr; } void *g_realloc_n(void *ptr, size_t nmemb, size_t size) { - size_t sz; - __coverity_negative_sink__(nmemb); __coverity_negative_sink__(size); - sz = nmemb * size; __coverity_escape__(ptr); - ptr = __coverity_alloc__(sz); + ptr = __coverity_alloc__(nmemb * size); + if (!ptr) { + __coverity_panic__(); + } /* * Memory beyond the old size isn't actually initialized. Can't * model that. See Coverity's realloc() model */ __coverity_writeall__(ptr); - __coverity_mark_as_afm_allocated__(ptr, "g_free"); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); return ptr; } void g_free(void *ptr) { __coverity_free__(ptr); - __coverity_mark_as_afm_freed__(ptr, "g_free"); + __coverity_mark_as_afm_freed__(ptr, AFM_free); } /* @@ -221,140 +265,81 @@ void *g_try_realloc_n(void *ptr, size_t nmemb, size_t size) return g_realloc_n(ptr, nmemb, size); } -/* Trivially derive the g_FOO() from the g_FOO_n() */ +/* Derive the g_FOO() from the g_FOO_n() */ void *g_malloc(size_t size) { - return g_malloc_n(1, size); + void *ptr; + + __coverity_negative_sink__(size); + ptr = __coverity_alloc__(size); + if (!ptr) { + __coverity_panic__(); + } + __coverity_mark_as_uninitialized_buffer__(ptr); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); + return ptr; } void *g_malloc0(size_t size) { - return g_malloc0_n(1, size); + void *ptr; + + __coverity_negative_sink__(size); + ptr = __coverity_alloc__(size); + if (!ptr) { + __coverity_panic__(); + } + __coverity_writeall0__(ptr); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); + return ptr; } void *g_realloc(void *ptr, size_t size) { - return g_realloc_n(ptr, 1, size); + __coverity_negative_sink__(size); + __coverity_escape__(ptr); + ptr = __coverity_alloc__(size); + if (!ptr) { + __coverity_panic__(); + } + /* + * Memory beyond the old size isn't actually initialized. Can't + * model that. See Coverity's realloc() model + */ + __coverity_writeall__(ptr); + __coverity_mark_as_afm_allocated__(ptr, AFM_free); + return ptr; } void *g_try_malloc(size_t size) { - return g_try_malloc_n(1, size); -} - -void *g_try_malloc0(size_t size) -{ - return g_try_malloc0_n(1, size); -} - -void *g_try_realloc(void *ptr, size_t size) -{ - return g_try_realloc_n(ptr, 1, size); -} - -/* Other memory allocation functions */ - -void *g_memdup(const void *ptr, unsigned size) -{ - unsigned char *dup; - unsigned i; + int nomem; - if (!ptr) { + if (nomem) { return NULL; } - - dup = g_malloc(size); - for (i = 0; i < size; i++) - dup[i] = ((unsigned char *)ptr)[i]; - return dup; + return g_malloc(size); } -/* - * GLib string allocation functions - */ - -char *g_strdup(const char *s) +void *g_try_malloc0(size_t size) { - char *dup; - size_t i; + int nomem; - if (!s) { + if (nomem) { return NULL; } - - __coverity_string_null_sink__(s); - __coverity_string_size_sink__(s); - dup = __coverity_alloc_nosize__(); - __coverity_mark_as_afm_allocated__(dup, "g_free"); - for (i = 0; (dup[i] = s[i]); i++) ; - return dup; + return g_malloc0(size); } -char *g_strndup(const char *s, size_t n) +void *g_try_realloc(void *ptr, size_t size) { - char *dup; - size_t i; - - __coverity_negative_sink__(n); + int nomem; - if (!s) { + if (nomem) { return NULL; } - - dup = g_malloc(n + 1); - for (i = 0; i < n && (dup[i] = s[i]); i++) ; - dup[i] = 0; - return dup; -} - -char *g_strdup_printf(const char *format, ...) -{ - char ch, *s; - size_t len; - - __coverity_string_null_sink__(format); - __coverity_string_size_sink__(format); - - ch = *format; - - s = __coverity_alloc_nosize__(); - __coverity_writeall__(s); - __coverity_mark_as_afm_allocated__(s, "g_free"); - return s; -} - -char *g_strdup_vprintf(const char *format, va_list ap) -{ - char ch, *s; - size_t len; - - __coverity_string_null_sink__(format); - __coverity_string_size_sink__(format); - - ch = *format; - ch = *(char *)ap; - - s = __coverity_alloc_nosize__(); - __coverity_writeall__(s); - __coverity_mark_as_afm_allocated__(s, "g_free"); - - return len; -} - -char *g_strconcat(const char *s, ...) -{ - char *s; - - /* - * Can't model: last argument must be null, the others - * null-terminated strings - */ - - s = __coverity_alloc_nosize__(); - __coverity_writeall__(s); - __coverity_mark_as_afm_allocated__(s, "g_free"); - return s; + return g_realloc(ptr, size); } /* Other glib functions */ |