* On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
defined by <sys/ptrace.h>.
+* The nonstandard siginfo_t fields 'si_int' and 'si_ptr' are deprecated, and
+ will be removed in a future release. Programs should instead use
+ 'si_value.sival_int' and 'si_value.sival_ptr', respectively.
* libm no longer supports SVID error handling (calling a user-provided
matherr function on error) or the _LIB_VERSION variable to control error
Changes to build and runtime requirements:
- [Add changes to build and runtime requirements here]
+* Some headers now make unconditional use of the C2011 'anonymous union'
+ feature. In order to compile a program that uses any of these headers,
+ you must use a compiler that supports this feature, even when conforming
+ to an earlier language standard. This has been true of GCC and Clang for
+ many years. The structures and headers affected are:
+
+ - siginfo_t (signal.h, sys/wait.h)
+
+ The advantage of this change is that these headers define many fewer
+ macros with surprising expansions (for instance, the identifier 'si_pid'
+ used to be a macro expanding to '_sifields._kill.si_pid' on GNU/Linux
+ systems).
Security related changes:
{
int _pad[__SI_PAD_SIZE];
- /* kill(). */
+ /* Signals sent by kill or sigqueue. si_sigval is only valid for
+ sigqueue. */
struct
{
__pid_t si_pid; /* Sending process ID. */
__uid_t si_uid; /* Real user ID of sending process. */
- } _kill;
+ __sigval_t si_value; /* Signal value. */
+ };
- /* POSIX.1b timers. */
+ /* POSIX.1b timers. 'si_sigval' (above) is also valid. */
struct
{
- int si_tid; /* Timer ID. */
+ int si_timerid; /* Timer ID. */
int si_overrun; /* Overrun count. */
__sigval_t si_sigval; /* Signal value. */
- } _timer;
+ };
- /* POSIX.1b signals. */
+ /* SIGCHLD. The first two fields overlay the si_pid and si_uid
+ fields above. */
struct
{
- __pid_t si_pid; /* Sending process ID. */
- __uid_t si_uid; /* Real user ID of sending process. */
- __sigval_t si_sigval; /* Signal value. */
- } _rt;
-
- /* SIGCHLD. */
- struct
- {
- __pid_t si_pid; /* Which child. */
- __uid_t si_uid; /* Real user ID of sending process. */
+ __pid_t __sigchld_si_pid; /* Which child. */
+ __uid_t __sigchld_si_uid; /* Real user ID of sending process. */
int si_status; /* Exit value or signal. */
__SI_CLOCK_T si_utime;
__SI_CLOCK_T si_stime;
- } _sigchld;
+ };
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
struct
/* used when si_code=SEGV_BNDERR */
struct
{
- void *_lower;
- void *_upper;
- } _addr_bnd;
+ void *si_lower;
+ void *si_upper;
+ };
/* used when si_code=SEGV_PKUERR */
- __uint32_t _pkey;
- } _bounds;
- } _sigfault;
+ __uint32_t si_pkey;
+ };
+ };
/* SIGPOLL. */
struct
{
long int si_band; /* Band event for SIGPOLL. */
int si_fd;
- } _sigpoll;
+ };
/* SIGSYS. */
#if __SI_HAVE_SIGSYS
struct
{
- void *_call_addr; /* Calling user insn. */
- int _syscall; /* Triggering system call number. */
- unsigned int _arch; /* AUDIT_ARCH_* of syscall. */
- } _sigsys;
+ void *si_call_addr; /* Calling user insn. */
+ int si_syscall; /* Triggering system call number. */
+ unsigned int si_arch; /* AUDIT_ARCH_* of syscall. */
+ };
#endif
- } _sifields;
+ };
} siginfo_t __SI_ALIGNMENT;
-/* X/Open requires some more fields with fixed names. */
-#define si_pid _sifields._kill.si_pid
-#define si_uid _sifields._kill.si_uid
-#define si_timerid _sifields._timer.si_tid
-#define si_overrun _sifields._timer.si_overrun
-#define si_status _sifields._sigchld.si_status
-#define si_utime _sifields._sigchld.si_utime
-#define si_stime _sifields._sigchld.si_stime
-#define si_value _sifields._rt.si_sigval
-#define si_int _sifields._rt.si_sigval.sival_int
-#define si_ptr _sifields._rt.si_sigval.sival_ptr
-#define si_addr _sifields._sigfault.si_addr
-#define si_addr_lsb _sifields._sigfault.si_addr_lsb
-#define si_lower _sifields._sigfault._bounds._addr_bnd._lower
-#define si_upper _sifields._sigfault._bounds._addr_bnd._upper
-#define si_pkey _sifields._sigfault._bounds._pkey
-#define si_band _sifields._sigpoll.si_band
-#define si_fd _sifields._sigpoll.si_fd
-#if __SI_HAVE_SIGSYS
-# define si_call_addr _sifields._sigsys._call_addr
-# define si_syscall _sifields._sigsys._syscall
-# define si_arch _sifields._sigsys._arch
+/* These field aliases are not in POSIX, and are preserved for
+ backward compatibility only. They may be removed in a future
+ release. */
+#ifdef __USE_MISC
+#define si_int si_value.sival_int \
+ __glibc_macro_warning("si_int is deprecated, use si_value.sival_int instead")
+#define si_ptr si_value.sival_ptr \
+ __glibc_macro_warning("si_ptr is deprecated, use si_value.sival_ptr instead")
#endif
#endif
#define __SI_HAVE_SIGSYS 0
-#define __SI_SIGFAULT_ADDL \
- int _si_imm; \
- unsigned int _si_flags; \
- unsigned long int _si_isr;
-
#ifdef __USE_GNU
-# define si_imm _sifields._sigfault._si_imm
-# define si_segvflags _sifields._sigfault._si_flags
-# define si_isr _sifields._sigfault._si_isr
+# define __SI_SIGFAULT_ADDL \
+ int si_imm; \
+ unsigned int si_segvflags; \
+ unsigned long int si_isr;
+#else
+# define __SI_SIGFAULT_ADDL \
+ int __si_imm; \
+ unsigned int __si_segvflags; \
+ unsigned long int __si_isr;
#endif
#endif
projects / thirdparty / glibc.git / commitdiff
