113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
#include <backtrace-supported.h>
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#include <backtrace.h>
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#include <ccan/err/err.h>
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#include <ccan/io/io.h>
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#include <ccan/str/str.h>
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#include <common/daemon.h>
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#include <common/status.h>
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#include <common/utils.h>
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#include <common/version.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <wally_core.h>
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#if BACKTRACE_SUPPORTED
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static struct backtrace_state *backtrace_state;
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static void (*bt_print)(const char *fmt, ...) PRINTF_FMT(1,2);
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static void (*bt_exit)(void);
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static int backtrace_status(void *unused UNUSED, uintptr_t pc,
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const char *filename, int lineno,
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const char *function)
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{
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bt_print("backtrace: %s:%d (%s) %p",
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filename, lineno, function, (void *)pc);
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return 0;
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}
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static void crashdump(int sig)
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{
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/* We do stderr first, since it's most reliable. */
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warnx("Fatal signal %d (version %s)", sig, version());
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if (backtrace_state)
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backtrace_print(backtrace_state, 0, stderr);
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/* Now send to parent. */
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bt_print("FATAL SIGNAL %d (version %s)", sig, version());
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if (backtrace_state)
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backtrace_full(backtrace_state, 0, backtrace_status, NULL, NULL);
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/* Probably shouldn't return. */
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bt_exit();
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/* This time it will kill us instantly. */
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kill(getpid(), sig);
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}
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static void crashlog_activate(void)
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{
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struct sigaction sa;
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sa.sa_handler = crashdump;
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sigemptyset(&sa.sa_mask);
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/* We want to fall through to default handler */
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sa.sa_flags = SA_RESETHAND;
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sigaction(SIGILL, &sa, NULL);
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sigaction(SIGABRT, &sa, NULL);
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sigaction(SIGFPE, &sa, NULL);
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sigaction(SIGSEGV, &sa, NULL);
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sigaction(SIGBUS, &sa, NULL);
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}
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#endif
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static int daemon_poll(struct pollfd *fds, nfds_t nfds, int timeout)
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{
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const char *t;
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t = taken_any();
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if (t)
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errx(1, "Outstanding taken pointers: %s", t);
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clean_tmpctx();
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return poll(fds, nfds, timeout);
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}
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void daemon_setup(const char *argv0,
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void (*backtrace_print)(const char *fmt, ...),
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void (*backtrace_exit)(void))
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{
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err_set_progname(argv0);
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#if BACKTRACE_SUPPORTED
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bt_print = backtrace_print;
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bt_exit = backtrace_exit;
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#if DEVELOPER
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/* Suppresses backtrace (breaks valgrind) */
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if (!getenv("LIGHTNINGD_DEV_NO_BACKTRACE"))
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backtrace_state = backtrace_create_state(argv0, 0, NULL, NULL);
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#else
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backtrace_state = backtrace_create_state(argv0, 0, NULL, NULL);
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#endif
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crashlog_activate();
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#endif
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/* We handle write returning errors! */
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signal(SIGPIPE, SIG_IGN);
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secp256k1_ctx = wally_get_secp_context();
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setup_tmpctx();
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io_poll_override(daemon_poll);
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}
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void daemon_shutdown(void)
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{
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tal_free(tmpctx);
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wally_cleanup(0);
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}
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