coverity-scan: list components, move model to scripts/coverity-scan

Place all files that can be useful to rebuild the Coverity
configuration in scripts/coverity-scan: the existing model
file, and the components setup.

The Markdown syntax was tested with Pandoc (but in any case
is meant more as a human-readable reference than as a part
of documentation).

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 386 deletions

diff --git a/scripts/coverity-model.c b/scripts/coverity-model.c
deleted file mode 100644
index 2c0346ff25..0000000000
--- a/scripts/coverity-model.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/* 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_read(AddressSpace *as, hwaddr addr,
-                               MemTxAttrs attrs,
-                               uint8_t *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(AddressSpace *as, hwaddr addr,
-                                MemTxAttrs attrs,
-                                const uint8_t *buf, int len)
-{
-    MemTxResult result;
-    __bufread(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;
-    }
-}
-
-/* Replay data is considered trusted.  */
-uint8_t replay_get_byte(void)
-{
-    uint8_t byte;
-    return byte;
-}
-
-
-/*
- * 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__();
-}