summaryrefslogtreecommitdiffstats
path: root/docs/images/reportingMaster.png
AgeCommit message (Expand)AuthorFilesLines
2017-09-15Testing group documentation update for EuphratesMorgan Richomme1-0/+0
id='n82' href='#n82'>82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369
/* 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
 * http://scan.coverity.com/projects/378
 */

#define NULL ((void *)0)

typedef unsigned char uint8_t;
typedef char int8_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef long ssize_t;
typedef unsigned long long uint64_t;
typedef long long int64_t;
typedef _Bool bool;

typedef struct va_list_str *va_list;

/* exec.c */

typedef struct AddressSpace AddressSpace;
typedef uint64_t hwaddr;
typedef uint32_t MemTxResult;
typedef uint64_t MemTxAttrs;

static void __bufwrite(uint8_t *buf, ssize_t len)
{
    int first, last;
    __coverity_negative_sink__(len);
    if (len == 0) return;
    buf[0] = first;
    buf[len-1] = last;
    __coverity_writeall__(buf);
}

static void __bufread(uint8_t *buf, ssize_t len)
{
    __coverity_negative_sink__(len);
    if (len == 0) return;
    int first = buf[0];
    int last = buf[len-1];
}

MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
                             uint8_t *buf, int len, bool is_write)
{
    MemTxResult result;

    // TODO: investigate impact of treating reads as producing
    // tainted data, with __coverity_tainted_data_argument__(buf).
    if (is_write) __bufread(buf, len); else __bufwrite(buf, len);

    return result;
}

/* Tainting */

typedef struct {} name2keysym_t;
static int get_keysym(const name2keysym_t *table,
                      const char *name)
{
    int result;
    if (result > 0) {
        __coverity_tainted_string_sanitize_content__(name);
        return result;
    } else {
        return 0;
    }
}

/*
 * GLib memory allocation functions.
 *
 * Note that we ignore the fact that g_malloc of 0 bytes returns NULL,
 * and g_realloc of 0 bytes frees the pointer.
 *
 * Modeling this would result in Coverity flagging a lot of memory
 * allocations as potentially returning NULL, and asking us to check
 * whether the result of the allocation is NULL or not.  However, the
 * resulting pointer should never be dereferenced anyway, and in fact
 * it is not in the vast majority of cases.
 *
 * If a dereference did happen, this would suppress a defect report
 * for an actual null pointer dereference.  But it's too unlikely to
 * be worth wading through the false positives, and with some luck
 * we'll get a buffer overflow reported anyway.
 */

/*
 * Allocation primitives, cannot return NULL
 * See also Coverity's library/generic/libc/all/all.c
 */

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);
    __coverity_mark_as_uninitialized_buffer__(ptr);
    __coverity_mark_as_afm_allocated__(ptr, "g_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);
    __coverity_writeall0__(ptr);
    __coverity_mark_as_afm_allocated__(ptr, "g_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);
    /*
     * 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");
    return ptr;
}

void g_free(void *ptr)
{
    __coverity_free__(ptr);
    __coverity_mark_as_afm_freed__(ptr, "g_free");
}

/*
 * Derive the g_try_FOO_n() from the g_FOO_n() by adding indeterminate
 * out of memory conditions
 */

void *g_try_malloc_n(size_t nmemb, size_t size)
{
    int nomem;

    if (nomem) {
        return NULL;
    }
    return g_malloc_n(nmemb, size);
}

void *g_try_malloc0_n(size_t nmemb, size_t size)
{
    int nomem;

    if (nomem) {
        return NULL;
    }
    return g_malloc0_n(nmemb, size);
}

void *g_try_realloc_n(void *ptr, size_t nmemb, size_t size)
{
    int nomem;

    if (nomem) {
        return NULL;
    }
    return g_realloc_n(ptr, nmemb, size);
}

/* Trivially derive the g_FOO() from the g_FOO_n() */

void *g_malloc(size_t size)
{
    return g_malloc_n(1, size);
}

void *g_malloc0(size_t size)
{
    return g_malloc0_n(1, size);
}

void *g_realloc(void *ptr, size_t size)
{
    return g_realloc_n(ptr, 1, size);
}

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;

    if (!ptr) {
        return NULL;
    }

    dup = g_malloc(size);
    for (i = 0; i < size; i++)
        dup[i] = ((unsigned char *)ptr)[i];
    return dup;
}

/*
 * GLib string allocation functions
 */

char *g_strdup(const char *s)
{
    char *dup;
    size_t i;

    if (!s) {
        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;
}

char *g_strndup(const char *s, size_t n)
{
    char *dup;
    size_t i;

    __coverity_negative_sink__(n);

    if (!s) {
        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;
}

/* Other glib functions */

typedef struct pollfd GPollFD;

int poll();

int g_poll (GPollFD *fds, unsigned nfds, int timeout)
{
    return poll(fds, nfds, timeout);
}

typedef struct _GIOChannel GIOChannel;
GIOChannel *g_io_channel_unix_new(int fd)
{
    GIOChannel *c = g_malloc0(sizeof(GIOChannel));
    __coverity_escape__(fd);
    return c;
}

void g_assertion_message_expr(const char     *domain,
                              const char     *file,
                              int             line,
                              const char     *func,
                              const char     *expr)
{
    __coverity_panic__();
}