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Merge "cutils: Add clang FORTIFY support"

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Treehugger Robot 2017-02-10 02:07:28 +00:00 committed by Gerrit Code Review
commit f2e615c7b8
1 changed files with 40 additions and 6 deletions
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46
libcutils/include/cutils/properties.h
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@ -43,7 +43,12 @@ extern "C" {
** If the property read fails or returns an empty value, the default
** value is used (if nonnull).
*/
int property_get(const char *key, char *value, const char *default_value);
int property_get(const char *key, char *value, const char *default_value)
/* Sometimes we use not-Bionic with this, so we need this check. */
#if defined(__BIONIC_FORTIFY)
__overloadable __RENAME_CLANG(property_get)
#endif
;
/* property_get_bool: returns the value of key coerced into a
** boolean. If the property is not set, then the default value is returned.
@ -106,14 +111,40 @@ int32_t property_get_int32(const char *key, int32_t default_value);
/* property_set: returns 0 on success, < 0 on failure
*/
int property_set(const char *key, const char *value);
int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie);
#if defined(__BIONIC_FORTIFY) && !defined(__clang__)
int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie);
#if defined(__BIONIC_FORTIFY)
#define __property_get_err_str "property_get() called with too small of a buffer"
#if defined(__clang__)
/* Some projects use -Weverything; enable_if is clang-specific.
** FIXME: This is marked used because we'll otherwise get complaints about an
** unused static function. This is more robust than marking it unused, since
** -Wused-but-marked-unused is a thing that will complain if this function is
** actually used, thus making FORTIFY noisier when an error happens. It's going
** to go away anyway during our FORTIFY cleanup.
**/
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgcc-compat"
__BIONIC_ERROR_FUNCTION_VISIBILITY
int property_get(const char *key, char *value, const char *default_value)
__overloadable
__enable_if(__bos(value) != __BIONIC_FORTIFY_UNKNOWN_SIZE &&
__bos(value) < PROPERTY_VALUE_MAX, __property_get_err_str)
__errorattr(__property_get_err_str)
__attribute__((used));
#pragma clang diagnostic pop
/* No object size? No FORTIFY.
*/
#else /* defined(__clang__) */
extern int __property_get_real(const char *, char *, const char *)
__asm__(__USER_LABEL_PREFIX__ "property_get");
__errordecl(__property_get_too_small_error, "property_get() called with too small of a buffer");
__errordecl(__property_get_too_small_error, __property_get_err_str);
__BIONIC_FORTIFY_INLINE
int property_get(const char *key, char *value, const char *default_value) {
@ -124,7 +155,10 @@ int property_get(const char *key, char *value, const char *default_value) {
return __property_get_real(key, value, default_value);
}
#endif
#endif /* defined(__clang__) */
#undef __property_get_err_str
#endif /* defined(__BIONIC_FORTIFY) */
#ifdef __cplusplus
}