$(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)
LIBWASI_EMULATED_MMAN_SOURCES = \
$(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)
+LIBWASI_EMULATED_SIGNAL_SOURCES = \
+ $(shell find $(LIBC_BOTTOM_HALF_DIR)/signal -name \*.c)
+LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES = \
+ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/signal/psignal.c \
+ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/strsignal.c
LIBC_BOTTOM_HALF_CRT_SOURCES = $(wildcard $(LIBC_BOTTOM_HALF_DIR)/crt/*.c)
LIBC_TOP_HALF_DIR = $(CURDIR)/libc-top-half
LIBC_TOP_HALF_MUSL_DIR = $(LIBC_TOP_HALF_DIR)/musl
MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))
+LIBWASI_EMULATED_SIGNAL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_SOURCES))
+LIBWASI_EMULATED_SIGNAL_MUSL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES))
# These variables describe the locations of various files and
# directories in the generated sysroot tree.
$(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS)
+$(SYSROOT_LIB)/libwasi-emulated-signal.a: $(LIBWASI_EMULATED_SIGNAL_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS)
+
%.a:
@mkdir -p "$(@D)"
# On Windows, the commandline for the ar invocation got too long, so it needs to be split up.
-D__wasilibc_printscan_no_floating_point \
-D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""
+$(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): WASM_CFLAGS += \
+ -D_WASI_EMULATED_SIGNAL
+
$(OBJDIR)/%.long-double.o: $(CURDIR)/%.c include_dirs
@mkdir -p "$(@D)"
"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
-I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \
-I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)
-$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): WASM_CFLAGS += \
+$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): WASM_CFLAGS += \
-I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \
-I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \
-I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \
$(SYSROOT_LIB)/libc.a \
$(SYSROOT_LIB)/libc-printscan-long-double.a \
$(SYSROOT_LIB)/libc-printscan-no-floating-point.a \
- $(SYSROOT_LIB)/libwasi-emulated-mman.a
+ $(SYSROOT_LIB)/libwasi-emulated-mman.a \
+ $(SYSROOT_LIB)/libwasi-emulated-signal.a
finish: startup_files libc
#
@# since these dependencies can vary between llvm versions.
"$(WASM_NM)" --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/*.o \
|grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort > "$(SYSROOT_SHARE)/defined-symbols.txt"
- for undef_sym in $$("$(WASM_NM)" --undefined-only "$(SYSROOT_LIB)"/*.a "$(SYSROOT_LIB)"/*.o \
+ for undef_sym in $$("$(WASM_NM)" --undefined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libc-*.a "$(SYSROOT_LIB)"/*.o \
|grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \
grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" || echo $$undef_sym; \
done | grep -v "^__mul" > "$(SYSROOT_SHARE)/undefined-symbols.txt"
# Generate a test file that includes all public header files.
#
cd "$(SYSROOT)" && \
- for header in $$(find include -type f -not -name mman.h |grep -v /bits/); do \
+ for header in $$(find include -type f -not -name mman.h -not -name signal.h |grep -v /bits/); do \
echo '#include <'$$header'>' | sed 's/include\///' ; \
done |LC_ALL=C sort >share/$(MULTIARCH_TRIPLE)/include-all.c ; \
cd - >/dev/null
#include <stdlib.h>
void abort(void) {
- // WASI doesn't yet support signals, so just trap to halt the program.
+ // wasm doesn't support signals, so just trap to halt the program.
__builtin_trap();
}
#include <__function___isatty.h>
#include <__functions_malloc.h>
#include <__functions_memcpy.h>
-#include <__header_bits_signal.h>
#include <__header_dirent.h>
#include <__header_fcntl.h>
#include <__header_inttypes.h>
#include <sched.h>
#include <search.h>
#include <semaphore.h>
-#include <signal.h>
#include <stdalign.h>
#include <stdbool.h>
#include <stdc-predef.h>
#include <sys/reg.h>
#include <sys/resource.h>
#include <sys/select.h>
-#include <sys/signal.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/stropts.h>
#define BLK_RESTART 0x10
#define BREAK 243
#define BUFSIZ 1024
-#define BUS_ADRALN 1
-#define BUS_ADRERR 2
-#define BUS_MCEERR_AO 5
-#define BUS_MCEERR_AR 4
-#define BUS_OBJERR 3
#define BYTE_ORDER __BYTE_ORDER
#define CANBSIZ 255
#define CBRK CEOL
#define CHRTYPE '3'
#define CINTR CTRL('c')
#define CKILL CTRL('u')
-#define CLD_CONTINUED 6
-#define CLD_DUMPED 3
-#define CLD_EXITED 1
-#define CLD_KILLED 2
-#define CLD_STOPPED 5
-#define CLD_TRAPPED 4
#define CLNEXT CTRL('v')
#define CLOCKS_PER_SEC ((clock_t)1000000000)
#define CLOCK_MONOTONIC (&_CLOCK_MONOTONIC)
#define FORM_C 3
#define FORM_N 1
#define FORM_T 2
-#define FPE_FLTDIV 3
-#define FPE_FLTINV 7
-#define FPE_FLTOVF 4
-#define FPE_FLTRES 6
-#define FPE_FLTSUB 8
-#define FPE_FLTUND 5
-#define FPE_INTDIV 1
-#define FPE_INTOVF 2
#define FP_ILOGB0 FP_ILOGBNAN
#define FP_ILOGBNAN (-1-0x7fffffff)
#define FP_INFINITE 1
#define IGMP_V2_MEMBERSHIP_REPORT 0x16
#define IGMP_v1_ROUTER 1
#define IGMP_v2_ROUTER 2
-#define ILL_BADSTK 8
-#define ILL_COPROC 7
-#define ILL_ILLADR 3
-#define ILL_ILLOPC 1
-#define ILL_ILLOPN 2
-#define ILL_ILLTRP 4
-#define ILL_PRVOPC 5
-#define ILL_PRVREG 6
#define IN6ADDRSZ NS_IN6ADDRSZ
#define IN6ADDR_ANY_INIT { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } }
#define IN6ADDR_LOOPBACK_INIT { { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } }
#define SEEK_END __WASI_WHENCE_END
#define SEEK_SET __WASI_WHENCE_SET
#define SEGSIZE 512
-#define SEGV_ACCERR 2
-#define SEGV_BNDERR 3
-#define SEGV_MAPERR 1
-#define SEGV_PKUERR 4
#define SEM_FAILED ((sem_t *)0)
#define SERVFAIL ns_r_servfail
#define SHORTBITS (sizeof(short) * 8)
#define SHUT_RD __WASI_SDFLAGS_RD
#define SHUT_RDWR (SHUT_RD | SHUT_WR)
#define SHUT_WR __WASI_SDFLAGS_WR
-#define SIGABRT __WASI_SIGNAL_ABRT
-#define SIGALRM __WASI_SIGNAL_ALRM
-#define SIGBUS __WASI_SIGNAL_BUS
-#define SIGCHLD __WASI_SIGNAL_CHLD
-#define SIGCONT __WASI_SIGNAL_CONT
-#define SIGEV_NONE 1
-#define SIGEV_SIGNAL 0
-#define SIGEV_THREAD 2
-#define SIGFPE __WASI_SIGNAL_FPE
-#define SIGHUP __WASI_SIGNAL_HUP
-#define SIGILL __WASI_SIGNAL_ILL
-#define SIGINT __WASI_SIGNAL_INT
-#define SIGIO SIGPOLL
-#define SIGIOT SIGABRT
-#define SIGKILL __WASI_SIGNAL_KILL
-#define SIGPIPE __WASI_SIGNAL_PIPE
-#define SIGPOLL __WASI_SIGNAL_POLL
-#define SIGPROF __WASI_SIGNAL_PROF
-#define SIGPWR __WASI_SIGNAL_PWR
-#define SIGQUIT __WASI_SIGNAL_QUIT
-#define SIGSEGV __WASI_SIGNAL_SEGV
-#define SIGSTOP __WASI_SIGNAL_STOP
-#define SIGSYS __WASI_SIGNAL_SYS
-#define SIGTERM __WASI_SIGNAL_TERM
-#define SIGTRAP __WASI_SIGNAL_TRAP
-#define SIGTSTP __WASI_SIGNAL_TSTP
-#define SIGTTIN __WASI_SIGNAL_TTIN
-#define SIGTTOU __WASI_SIGNAL_TTOU
-#define SIGUNUSED SIGSYS
-#define SIGURG __WASI_SIGNAL_URG
-#define SIGUSR1 __WASI_SIGNAL_USR1
-#define SIGUSR2 __WASI_SIGNAL_USR2
-#define SIGVTALRM __WASI_SIGNAL_VTALRM
-#define SIGWINCH __WASI_SIGNAL_WINCH
-#define SIGXCPU __WASI_SIGNAL_XCPU
-#define SIGXFSZ __WASI_SIGNAL_XFSZ
#define SIG_ATOMIC_MAX INT32_MAX
#define SIG_ATOMIC_MIN INT32_MIN
-#define SIG_BLOCK 0
-#define SIG_HOLD ((void (*)(int)) 2)
-#define SIG_SETMASK 2
-#define SIG_UNBLOCK 1
#define SIZE_MAX UINT32_MAX
-#define SI_ASYNCIO (-4)
-#define SI_ASYNCNL (-60)
-#define SI_KERNEL 128
#define SI_LOAD_SHIFT 16
-#define SI_MESGQ (-3)
-#define SI_QUEUE (-1)
-#define SI_SIGIO (-5)
-#define SI_TIMER (-2)
-#define SI_TKILL (-6)
-#define SI_USER 0
#define SLC_ABORT 7
#define SLC_ACK 0x80
#define SLC_AO 4
#define _SC_XOPEN_XPG4 100
#define _SEARCH_H
#define _SEMAPHORE_H
-#define _SIGNAL_H
#define _SIZE_T
#define _STDALIGN_H
#define _STDBOOL_H
#define __wasilibc___errno_values_h
#define __wasilibc___fd_set_h
#define __wasilibc___function___isatty_h
-#define __wasilibc___header_bits_signal_h
#define __wasilibc___header_dirent_h
#define __wasilibc___header_fcntl_h
#define __wasilibc___header_netinet_in_h
#define rr_code rr_hdr.icmp6_code
#define rr_seqnum rr_hdr.icmp6_data32[0]
#define rr_type rr_hdr.icmp6_type
-#define sa_handler __sa_handler.sa_handler
-#define sa_sigaction __sa_handler.sa_sigaction
#define scalbln(x,y) __tg_real_2_1(scalbln, (x), (y))
#define scalbn(x,y) __tg_real_2_1(scalbn, (x), (y))
#define scandir64 scandir
#define setbit(x,i) __bitop(x,i,|=)
-#define si_addr __si_fields.__sigfault.si_addr
-#define si_addr_lsb __si_fields.__sigfault.si_addr_lsb
-#define si_arch __si_fields.__sigsys.si_arch
-#define si_band __si_fields.__sigpoll.si_band
-#define si_call_addr __si_fields.__sigsys.si_call_addr
-#define si_fd __si_fields.__sigpoll.si_fd
-#define si_int si_value.sival_int
-#define si_lower __si_fields.__sigfault.__first.__addr_bnd.si_lower
-#define si_overrun __si_fields.__si_common.__first.__timer.si_overrun
-#define si_pid __si_fields.__si_common.__first.__piduid.si_pid
-#define si_pkey __si_fields.__sigfault.__first.si_pkey
-#define si_ptr si_value.sival_ptr
-#define si_status __si_fields.__si_common.__second.__sigchld.si_status
-#define si_stime __si_fields.__si_common.__second.__sigchld.si_stime
-#define si_syscall __si_fields.__sigsys.si_syscall
-#define si_timerid __si_fields.__si_common.__first.__timer.si_timerid
-#define si_uid __si_fields.__si_common.__first.__piduid.si_uid
-#define si_upper __si_fields.__sigfault.__first.__addr_bnd.si_upper
-#define si_utime __si_fields.__si_common.__second.__sigchld.si_utime
-#define si_value __si_fields.__si_common.__second.si_value
#define signbit(x) (__builtin_signbit(x))
#define sin(x) __tg_real_complex(sin, (x))
#define sinh(x) __tg_real_complex(sinh, (x))
+++ /dev/null
-#ifndef __wasilibc___header_bits_signal_h
-#define __wasilibc___header_bits_signal_h
-
-#include <wasi/api.h>
-
-#define SIGHUP __WASI_SIGNAL_HUP
-#define SIGINT __WASI_SIGNAL_INT
-#define SIGQUIT __WASI_SIGNAL_QUIT
-#define SIGILL __WASI_SIGNAL_ILL
-#define SIGTRAP __WASI_SIGNAL_TRAP
-#define SIGABRT __WASI_SIGNAL_ABRT
-#define SIGBUS __WASI_SIGNAL_BUS
-#define SIGFPE __WASI_SIGNAL_FPE
-#define SIGKILL __WASI_SIGNAL_KILL
-#define SIGUSR1 __WASI_SIGNAL_USR1
-#define SIGSEGV __WASI_SIGNAL_SEGV
-#define SIGUSR2 __WASI_SIGNAL_USR2
-#define SIGPIPE __WASI_SIGNAL_PIPE
-#define SIGALRM __WASI_SIGNAL_ALRM
-#define SIGTERM __WASI_SIGNAL_TERM
-#define SIGCHLD __WASI_SIGNAL_CHLD
-#define SIGCONT __WASI_SIGNAL_CONT
-#define SIGSTOP __WASI_SIGNAL_STOP
-#define SIGTSTP __WASI_SIGNAL_TSTP
-#define SIGTTIN __WASI_SIGNAL_TTIN
-#define SIGTTOU __WASI_SIGNAL_TTOU
-#define SIGURG __WASI_SIGNAL_URG
-#define SIGXCPU __WASI_SIGNAL_XCPU
-#define SIGXFSZ __WASI_SIGNAL_XFSZ
-#define SIGVTALRM __WASI_SIGNAL_VTALRM
-#define SIGPROF __WASI_SIGNAL_PROF
-#define SIGWINCH __WASI_SIGNAL_WINCH
-#define SIGPOLL __WASI_SIGNAL_POLL
-#define SIGPWR __WASI_SIGNAL_PWR
-#define SIGSYS __WASI_SIGNAL_SYS
-
-#define SIGIOT SIGABRT
-#define SIGIO SIGPOLL
-#define SIGUNUSED SIGSYS
-
-#endif
--- /dev/null
+// Userspace emulation of `raise` and `signal`.
+//
+// WebAssembly doesn't support asynchronous signal delivery, so we can't
+// support it in WASI libc. But we can make things like `raise` work.
+
+#define _WASI_EMULATED_SIGNAL
+#define _ALL_SOURCE
+#define _GNU_SOURCE
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+
+void __SIG_IGN(int sig) {
+ // do nothing
+}
+
+_Noreturn
+void __SIG_ERR(int sig) {
+ __builtin_trap();
+}
+
+_Noreturn
+static void core_handler(int sig) {
+ fprintf(stderr, "Program recieved fatal signal: %s\n", strsignal(sig));
+ abort();
+}
+
+_Noreturn
+static void terminate_handler(int sig) {
+ fprintf(stderr, "Program recieved termination signal: %s\n", strsignal(sig));
+ abort();
+}
+
+_Noreturn
+static void stop_handler(int sig) {
+ fprintf(stderr, "Program recieved stop signal: %s\n", strsignal(sig));
+ abort();
+}
+
+static void continue_handler(int sig) {
+ // do nothing
+}
+
+static const sighandler_t default_handlers[_NSIG] = {
+ // Default behavior: "core".
+ [SIGABRT] = core_handler,
+ [SIGBUS] = core_handler,
+ [SIGFPE] = core_handler,
+ [SIGILL] = core_handler,
+#if SIGIOT != SIGABRT
+ [SIGIOT] = core_handler,
+#endif
+ [SIGQUIT] = core_handler,
+ [SIGSEGV] = core_handler,
+ [SIGSYS] = core_handler,
+ [SIGTRAP] = core_handler,
+ [SIGXCPU] = core_handler,
+ [SIGXFSZ] = core_handler,
+#if defined(SIGUNUSED) && SIGUNUSED != SIGSYS
+ [SIGUNUSED] = core_handler,
+#endif
+
+ // Default behavior: ignore.
+ [SIGCHLD] = SIG_IGN,
+#if defined(SIGCLD) && SIGCLD != SIGCHLD
+ [SIGCLD] = SIG_IGN,
+#endif
+ [SIGURG] = SIG_IGN,
+ [SIGWINCH] = SIG_IGN,
+
+ // Default behavior: "continue".
+ [SIGCONT] = continue_handler,
+
+ // Default behavior: "stop".
+ [SIGSTOP] = stop_handler,
+ [SIGTSTP] = stop_handler,
+ [SIGTTIN] = stop_handler,
+ [SIGTTOU] = stop_handler,
+
+ // Default behavior: "terminate".
+ [SIGHUP] = terminate_handler,
+ [SIGINT] = terminate_handler,
+ [SIGKILL] = terminate_handler,
+ [SIGUSR1] = terminate_handler,
+ [SIGUSR2] = terminate_handler,
+ [SIGPIPE] = terminate_handler,
+ [SIGALRM] = terminate_handler,
+ [SIGTERM] = terminate_handler,
+ [SIGSTKFLT] = terminate_handler,
+ [SIGVTALRM] = terminate_handler,
+ [SIGPROF] = terminate_handler,
+ [SIGIO] = terminate_handler,
+#if SIGPOLL != SIGIO
+ [SIGPOLL] = terminate_handler,
+#endif
+ [SIGPWR] = terminate_handler,
+};
+
+static sighandler_t handlers[_NSIG];
+
+int raise(int sig) {
+ if (sig < 0 || sig >= _NSIG) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ sighandler_t func = handlers[sig];
+
+ if (func == NULL) {
+ default_handlers[sig](sig);
+ } else {
+ func(sig);
+ }
+
+ return 0;
+}
+
+void (*signal(int sig, void (*func)(int)))(int) {
+ assert(SIG_DFL == NULL);
+
+ if (sig < 0 || sig >= _NSIG) {
+ errno = EINVAL;
+ return SIG_ERR;
+ }
+
+ if (sig == SIGKILL || sig == SIGSTOP) {
+ errno = EINVAL;
+ return SIG_ERR;
+ }
+
+ sighandler_t old = handlers[sig];
+
+ handlers[sig] = func;
+
+ return old;
+}
+
+extern __typeof(signal) bsd_signal __attribute__((weak, alias("signal")));
+extern __typeof(signal) __sysv_signal __attribute__((weak, alias("signal")));
-#include <__header_bits_signal.h>
+#ifdef _WASI_EMULATED_SIGNAL
+
+#define SIGHUP 1
+#define SIGINT 2
+#define SIGQUIT 3
+#define SIGILL 4
+#define SIGTRAP 5
+#define SIGABRT 6
+#define SIGIOT SIGABRT
+#define SIGBUS 7
+#define SIGFPE 8
+#define SIGKILL 9
+#define SIGUSR1 10
+#define SIGSEGV 11
+#define SIGUSR2 12
+#define SIGPIPE 13
+#define SIGALRM 14
+#define SIGTERM 15
+#define SIGSTKFLT 16
+#define SIGCHLD 17
+#define SIGCONT 18
+#define SIGSTOP 19
+#define SIGTSTP 20
+#define SIGTTIN 21
+#define SIGTTOU 22
+#define SIGURG 23
+#define SIGXCPU 24
+#define SIGXFSZ 25
+#define SIGVTALRM 26
+#define SIGPROF 27
+#define SIGWINCH 28
+#define SIGIO 29
+#define SIGPOLL 29
+#define SIGPWR 30
+#define SIGSYS 31
+#define SIGUNUSED SIGSYS
+
+#define _NSIG 65
+
+#endif
+#ifndef _WASI_EMULATED_SIGNAL
+#error "wasm lacks signal support; to enable minimal signal emulation, \
+compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
+#else
#ifndef _SIGNAL_H
#define _SIGNAL_H
#ifdef _GNU_SOURCE
#define __ucontext ucontext
#endif
-#endif
#define __NEED_size_t
#define __NEED_pid_t
#define SI_KERNEL 128
typedef struct sigaltstack stack_t;
+#endif
#endif
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
+#ifdef __wasilibc_unmodified_upstream /* WASI has no sigaction */
#define SIG_HOLD ((void (*)(int)) 2)
#define FPE_INTDIV 1
#define SIGEV_SIGNAL 0
#define SIGEV_NONE 1
#define SIGEV_THREAD 2
+#endif
#ifdef __wasilibc_unmodified_upstream /* WASI has no realtime signals */
int __libc_current_sigrtmin(void);
int sigqueue(pid_t, int, union sigval);
#endif
+#ifdef __wasilibc_unmodified_upstream /* WASI has no threads yet */
int pthread_sigmask(int, const sigset_t *__restrict, sigset_t *__restrict);
int pthread_kill(pthread_t, int);
+#endif
-#ifdef __wasilibc_unmodified_upstream /* WASI has no signals */
+#ifdef __wasilibc_unmodified_upstream /* WASI has no siginfo */
void psiginfo(const siginfo_t *, const char *);
-void psignal(int, const char *);
#endif
+void psignal(int, const char *);
#endif
#endif
#endif
-#ifdef __wasilibc_unmodified_upstream /* WASI has no signals */
#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
#define NSIG _NSIG
typedef void (*sig_t)(int);
#ifdef _GNU_SOURCE
typedef void (*sighandler_t)(int);
void (*bsd_signal(int, void (*)(int)))(int);
+#ifdef __wasilibc_unmodified_upstream /* WASI has no signal sets */
int sigisemptyset(const sigset_t *);
int sigorset (sigset_t *, const sigset_t *, const sigset_t *);
int sigandset(sigset_t *, const sigset_t *, const sigset_t *);
#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND
#endif
+#endif
+#ifdef __wasilibc_unmodified_upstream /* 1 is a valid function pointer on wasm */
#define SIG_ERR ((void (*)(int))-1)
#define SIG_DFL ((void (*)(int)) 0)
#define SIG_IGN ((void (*)(int)) 1)
+#else
+void __SIG_ERR(int);
+void __SIG_IGN(int);
+#define SIG_ERR (__SIG_ERR)
+#define SIG_DFL ((void (*)(int)) 0)
+#define SIG_IGN (__SIG_IGN)
#endif
+#ifdef __wasilibc_unmodified_upstream /* Make sig_atomic_t 64-bit on wasm64 */
typedef int sig_atomic_t;
+#else
+typedef long sig_atomic_t;
+#endif
-#ifdef __wasilibc_unmodified_upstream /* WASI has no signals */
void (*signal(int, void (*)(int)))(int);
-#endif
int raise(int);
+#ifdef __wasilibc_unmodified_upstream /* WASI has no sigtimedwait */
#if _REDIR_TIME64
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
__REDIR(sigtimedwait, __sigtimedwait_time64);
#endif
#endif
+#endif
#ifdef __cplusplus
}
#endif
#endif
+#endif
#include <limits.h>
#include <errno.h>
#include <sys/resource.h>
+#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals
#include <signal.h>
+#endif
#include <sys/sysinfo.h>
#include "syscall.h"
#include "libc.h"
#include "../../include/signal.h"
+#ifdef __wasilibc_unmodified_upstream // WASI has no sigaction
hidden int __sigaction(int, const struct sigaction *, struct sigaction *);
hidden void __block_all_sigs(void *);
hidden void __restore_sigs(void *);
hidden void __get_handler_set(sigset_t *);
+#endif
#endif
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