diff options
| -rw-r--r-- | include/libbb.h | 69 | ||||
| -rw-r--r-- | include/platform.h | 9 |
2 files changed, 44 insertions, 34 deletions
diff --git a/include/libbb.h b/include/libbb.h index 955287c..bcf604a 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -331,12 +331,12 @@ void xmove_fd(int, int) FAST_FUNC; DIR *xopendir(const char *path) FAST_FUNC; DIR *warn_opendir(const char *path) FAST_FUNC; -/* UNUSED: char *xmalloc_realpath(const char *path) FAST_FUNC; */ -char *xmalloc_readlink(const char *path) FAST_FUNC; -char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC; -char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC; +/* UNUSED: char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC; */ +char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC; +char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC; +char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC RETURNS_MALLOC; -char *xmalloc_follow_symlinks(const char *path) FAST_FUNC; +char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC; enum { @@ -514,23 +514,23 @@ int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC; /* Connect to peer identified by lsa */ int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC; /* Get local address of bound or accepted socket */ -len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC; +len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC; /* Return malloc'ed len_and_sockaddr with socket address of host:port * Currently will return IPv4 or IPv6 sockaddrs only * (depending on host), but in theory nothing prevents e.g. * UNIX socket address being returned, IPX sockaddr etc... * On error does bb_error_msg and returns NULL */ -len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC; +len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; /* Version which dies on error */ -len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC; -len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC; +len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; +len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC; /* Same, useful if you want to force family (e.g. IPv6) */ #if !ENABLE_FEATURE_IPV6 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port)) #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port)) #else -len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC; -len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC; +len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC; +len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC; #endif /* Assign sin[6]_port member if the socket is an AF_INET[6] one, * otherwise no-op. Useful for ftp. @@ -539,14 +539,14 @@ void set_nport(len_and_sockaddr *lsa, unsigned port) FAST_FUNC; /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */ int get_nport(const struct sockaddr *sa) FAST_FUNC; /* Reverse DNS. Returns NULL on failure. */ -char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC; +char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* This one doesn't append :PORTNUM */ -char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC; +char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* This one also doesn't fall back to dotted IP (returns NULL) */ -char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC; +char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; /* inet_[ap]ton on steroids */ -char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC; -char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC; +char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; +char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC; // "old" (ipv4 only) API // users: traceroute.c hostname.c - use _list_ of all IPs struct hostent *xgethostbyname(const char *name) FAST_FUNC; @@ -564,15 +564,16 @@ ssize_t recv_from_to(int fd, void *buf, size_t len, int flags, struct sockaddr *to, socklen_t sa_size) FAST_FUNC; -char *xstrdup(const char *s) FAST_FUNC; -char *xstrndup(const char *s, int n) FAST_FUNC; + +char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC; +char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC; void overlapping_strcpy(char *dst, const char *src) FAST_FUNC; char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC; char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC; /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc. * But potentially slow, don't use in one-billion-times loops */ int bb_putchar(int ch) FAST_FUNC; -char *xasprintf(const char *format, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; +char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC; /* Prints unprintable chars ch as ^C or M-c to file * (M-c is used only if ch is ORed with PRINTABLE_META), * else it is printed as-is (except for ch = 0x9b) */ @@ -592,9 +593,9 @@ void fputc_printable(int ch, FILE *file) FAST_FUNC; /* dmalloc will redefine these to it's own implementation. It is safe * to have the prototypes here unconditionally. */ -void *malloc_or_warn(size_t size) FAST_FUNC; -void *xmalloc(size_t size) FAST_FUNC; -void *xzalloc(size_t size) FAST_FUNC; +void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC; +void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC; +void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC; void *xrealloc(void *old, size_t size) FAST_FUNC; /* After xrealloc_vector(v, 4, idx) it's ok to use * at least v[idx] and v[idx+1], for all idx values. @@ -617,16 +618,16 @@ extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FA // Reads one line a-la fgets (but doesn't save terminating '\n'). // Reads byte-by-byte. Useful when it is important to not read ahead. // Bytes are appended to pfx (which must be malloced, or NULL). -extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC; +extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */ -extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC; +extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */ -extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC; +extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Autodetects .gz etc */ extern int open_zipped(const char *fname) FAST_FUNC; -extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC; +extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Never returns NULL */ -extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC; +extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC; // NB: will return short write on error, not -1, @@ -645,17 +646,17 @@ extern void xprint_and_close_file(FILE *file) FAST_FUNC; extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC; extern char *bb_get_chunk_with_continuation(FILE *file, int *end, int *lineno) FAST_FUNC; /* Reads up to (and including) TERMINATING_STRING: */ -extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC; +extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC; /* Same, with limited max size, and returns the length (excluding NUL): */ -extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC; +extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC; /* Chops off TERMINATING_STRING from the end: */ -extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC; +extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC; /* Reads up to (and including) "\n" or NUL byte: */ -extern char *xmalloc_fgets(FILE *file) FAST_FUNC; +extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC; /* Chops off '\n' from the end, unlike fgets: */ -extern char *xmalloc_fgetline(FILE *file) FAST_FUNC; +extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC; /* Same, but doesn't try to conserve space (may have some slack after the end) */ -/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC; */ +/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */ extern void die_if_ferror(FILE *file, const char *msg) FAST_FUNC; extern void die_if_ferror_stdout(void) FAST_FUNC; @@ -1157,7 +1158,7 @@ const char *nth_string(const char *strings, int n) FAST_FUNC; extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC; extern void print_login_prompt(void) FAST_FUNC; -char *xmalloc_ttyname(int fd) FAST_FUNC; +char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC; /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */ int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC; diff --git a/include/platform.h b/include/platform.h index 67b04f8..54bc27d 100644 --- a/include/platform.h +++ b/include/platform.h @@ -60,6 +60,15 @@ #define UNUSED_PARAM __attribute__ ((__unused__)) #define NORETURN __attribute__ ((__noreturn__)) +/* "The malloc attribute is used to tell the compiler that a function + * may be treated as if any non-NULL pointer it returns cannot alias + * any other pointer valid when the function returns. This will often + * improve optimization. Standard functions with this property include + * malloc and calloc. realloc-like functions have this property as long + * as the old pointer is never referred to (including comparing it + * to the new pointer) after the function returns a non-NULL value." + */ +#define RETURNS_MALLOC __attribute__ ((malloc)) #define PACKED __attribute__ ((__packed__)) #define ALIGNED(m) __attribute__ ((__aligned__(m))) |