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