GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2011 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include "cache_varnishd.h"
#include "acceptor/cache_acceptor.h"

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>

#include <sys/mman.h>

#ifdef HAVE_PTHREAD_NP_H
#  include <pthread_np.h>
#endif

#include "common/heritage.h"

#include "vcli_serve.h"
#include "vnum.h"
#include "vtim.h"
#include "vrnd.h"

#include "hash/hash_slinger.h"

volatile struct params          *cache_param;
static pthread_mutex_t          cache_vrnd_mtx;
static vtim_dur                 shutdown_delay = 0;

pthread_mutexattr_t mtxattr_errorcheck;

static void
cache_vrnd_lock(void)
{
        PTOK(pthread_mutex_lock(&cache_vrnd_mtx));
}

static void
cache_vrnd_unlock(void)
{
        PTOK(pthread_mutex_unlock(&cache_vrnd_mtx));
}

/*--------------------------------------------------------------------
 * Per thread storage for the session currently being processed by
 * the thread.  This is used for panic messages.
 */

static pthread_key_t req_key;
static pthread_key_t bo_key;
static pthread_key_t wrk_key;
pthread_key_t witness_key;
pthread_key_t panic_key;

void
THR_SetBusyobj(const struct busyobj *bo)
{

        PTOK(pthread_setspecific(bo_key, bo));
}

struct busyobj *
THR_GetBusyobj(void)
{

        return (pthread_getspecific(bo_key));
}

void
THR_SetRequest(const struct req *req)
{

        PTOK(pthread_setspecific(req_key, req));
}

struct req *
THR_GetRequest(void)
{

        return (pthread_getspecific(req_key));
}

void
THR_SetWorker(const struct worker *wrk)
{

        PTOK(pthread_setspecific(wrk_key, wrk));
}

struct worker *
THR_GetWorker(void)
{

        return (pthread_getspecific(wrk_key));
}

/*--------------------------------------------------------------------
 * Name threads if our pthreads implementation supports it.
 */

static pthread_key_t name_key;

static void
thr_setname_generic(const char *name)
{
        char buf[16];

        /* The Linux kernel enforces a strict limitation of 15 bytes name,
         * truncate the name if we would overflow it.
         */
        if (strlen(name) > 15) {
                bprintf(buf, "%.14s~", name);
                name = buf;
        }

        //lint --e{438} Last value assigned not used
        PTOK(pthread_setname_np(pthread_self(), name));
}

void
THR_SetName(const char *name)
{

        PTOK(pthread_setspecific(name_key, name));
#if defined(__APPLE__)
        (void)pthread_setname_np(name);
#elif defined(__NetBSD__)
        (void)pthread_setname_np(pthread_self(), "%s", (char *)(uintptr_t)name);
#else
        thr_setname_generic(name);
#endif
}

const char *
THR_GetName(void)
{

        return (pthread_getspecific(name_key));
}

/*--------------------------------------------------------------------
 * Generic setup all our threads should call
 */
static stack_t altstack;

void
THR_Init(void)
{
        if (altstack.ss_sp != NULL)
                AZ(sigaltstack(&altstack, NULL));
}

/*--------------------------------------------------------------------
 * VXID's are unique transaction numbers allocated with a minimum of
 * locking overhead via pools in the worker threads.
 *
 * VXID's are mostly for use in VSL and for that reason we never return
 * zero vxid, in order to reserve that for "unassociated" VSL records.
 */

static uint64_t vxid_base = 1;
static uint32_t vxid_chunk = 32768;
static struct lock vxid_lock;

vxid_t
VXID_Get(const struct worker *wrk, uint64_t mask)
{
        struct vxid_pool *v;
        vxid_t retval;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        CHECK_OBJ_NOTNULL(wrk->wpriv, WORKER_PRIV_MAGIC);
        v = wrk->wpriv->vxid_pool;
        AZ(mask & VSL_IDENTMASK);
        while (v->count == 0 || v->next >= VRT_INTEGER_MAX) {
                Lck_Lock(&vxid_lock);
                v->next = vxid_base;
                v->count = vxid_chunk;
                vxid_base += v->count;
                if (vxid_base >= VRT_INTEGER_MAX)
                        vxid_base = 1;
                Lck_Unlock(&vxid_lock);
        }
        v->count--;
        assert(v->next > 0);
        assert(v->next < VSL_CLIENTMARKER);
        retval.vxid = v->next | mask;
        v->next++;
        return (retval);
}

/*--------------------------------------------------------------------
 * Debugging aids
 */

/*
 * Dumb down the VXID allocation to make it predictable for
 * varnishtest cases
 */
static void v_matchproto_(cli_func_t)
cli_debug_xid(struct cli *cli, const char * const *av, void *priv)
{
        (void)priv;
        if (av[2] != NULL) {
                vxid_base = strtoull(av[2], NULL, 0);
                vxid_chunk = 0;
                if (av[3] != NULL)
                        vxid_chunk = strtoul(av[3], NULL, 0);
                if (vxid_chunk == 0)
                        vxid_chunk = 1;
        }
        VCLI_Out(cli, "XID is %ju chunk %u", (uintmax_t)vxid_base, vxid_chunk);
}

/*
 * Artificially slow down the process shutdown.
 */
static void v_matchproto_(cli_func_t)
cli_debug_shutdown_delay(struct cli *cli, const char * const *av, void *priv)
{

        (void)cli;
        (void)priv;
        shutdown_delay = VNUM_duration(av[2]);
}

/*
 * Default to seed=1, this is the only seed value POSIX guarantees will
 * result in a reproducible random number sequence.
 */
static void v_matchproto_(cli_func_t)
cli_debug_srandom(struct cli *cli, const char * const *av, void *priv)
{
        unsigned seed = 1;

        (void)priv;
        (void)cli;
        if (av[2] != NULL)
                seed = strtoul(av[2], NULL, 0);
        VRND_SeedTestable(seed);
}

static struct cli_proto debug_cmds[] = {
        { CLICMD_DEBUG_XID,             "d", cli_debug_xid },
        { CLICMD_DEBUG_SHUTDOWN_DELAY,  "d", cli_debug_shutdown_delay },
        { CLICMD_DEBUG_SRANDOM,         "d", cli_debug_srandom },
        { NULL }
};

/*--------------------------------------------------------------------
 * XXX: Think more about which order we start things
 */

#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
static void
child_malloc_fail(void *p, const char *s)
{
        VSL(SLT_Error, NO_VXID, "MALLOC ERROR: %s (%p)", s, p);
        fprintf(stderr, "MALLOC ERROR: %s (%p)\n", s, p);
        WRONG("Malloc Error");
}
#endif

/*=====================================================================
 * signal handler for child process
 */

static void v_noreturn_ v_matchproto_()
child_signal_handler(int s, siginfo_t *si, void *c)
{
        char buf[1024];
        struct sigaction sa;
        struct req *req;
        const char *a, *p, *info = NULL;

        (void)c;
        /* Don't come back */
        memset(&sa, 0, sizeof sa);
        sa.sa_handler = SIG_DFL;
        (void)sigaction(SIGSEGV, &sa, NULL);
        (void)sigaction(SIGBUS, &sa, NULL);
        (void)sigaction(SIGABRT, &sa, NULL);

        while (s == SIGSEGV || s == SIGBUS) {
                req = THR_GetRequest();
                if (req == NULL || req->wrk == NULL)
                        break;
                a = TRUST_ME(si->si_addr);
                p = TRUST_ME(req->wrk);
                p += sizeof *req->wrk;
                // rough safe estimate - top of stack
                if (a > p + cache_param->wthread_stacksize)
                        break;
                if (a < p - 2 * cache_param->wthread_stacksize)
                        break;
                info = "\nTHIS PROBABLY IS A STACK OVERFLOW - "
                        "check thread_pool_stack parameter";
                break;
        }
        bprintf(buf, "Signal %d (%s) received at %p si_code %d%s",
                s, strsignal(s), si->si_addr, si->si_code,
                info ? info : "");

        VAS_Fail(__func__,
                 __FILE__,
                 __LINE__,
                 buf,
                 VAS_WRONG);
}

/*=====================================================================
 * Magic for panicking properly on signals
 */

static void
child_sigmagic(size_t altstksz)
{
        struct sigaction sa;

        memset(&sa, 0, sizeof sa);

        size_t sz = vmax_t(size_t, SIGSTKSZ + 4096, altstksz);
        altstack.ss_sp = mmap(NULL, sz,  PROT_READ | PROT_WRITE,
                              MAP_PRIVATE | MAP_ANONYMOUS,
                              -1, 0);
        AN(altstack.ss_sp != MAP_FAILED);
        AN(altstack.ss_sp);
        altstack.ss_size = sz;
        altstack.ss_flags = 0;
        sa.sa_flags |= SA_ONSTACK;

        THR_Init();

        sa.sa_sigaction = child_signal_handler;
        sa.sa_flags |= SA_SIGINFO;
        (void)sigaction(SIGBUS, &sa, NULL);
        (void)sigaction(SIGABRT, &sa, NULL);
        (void)sigaction(SIGSEGV, &sa, NULL);
}

static void
cli_quit(int sig)
{

        if (!IS_CLI()) {
                PTOK(pthread_kill(cli_thread, sig));
                return;
        }

        WRONG("It's time for the big quit");
}

/*=====================================================================
 * Run the child process
 */

static void v_matchproto_(cli_func_t)
ccf_child_start(struct cli *cli, const char * const *av, void *priv)
{
        (void)av;
        (void)priv;

        VCA_Start(cli);
}

static struct cli_proto child_cmds[] = {
        { CLICMD_SERVER_START,          "", ccf_child_start },
        { NULL }
};

void
child_main(int sigmagic, size_t altstksz)
{

        if (sigmagic)
                child_sigmagic(altstksz);
        (void)signal(SIGINT, SIG_DFL);
        (void)signal(SIGTERM, SIG_DFL);
        (void)signal(SIGQUIT, cli_quit);

#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
        malloc_message = child_malloc_fail;
#endif

        /* Before anything uses pthreads in anger */
        PTOK(pthread_mutexattr_init(&mtxattr_errorcheck));
        PTOK(pthread_mutexattr_settype(&mtxattr_errorcheck, PTHREAD_MUTEX_ERRORCHECK));

        cache_param = heritage.param;

        PTOK(pthread_key_create(&req_key, NULL));
        PTOK(pthread_key_create(&bo_key, NULL));
        PTOK(pthread_key_create(&wrk_key, NULL));
        PTOK(pthread_key_create(&witness_key, free));
        PTOK(pthread_key_create(&name_key, NULL));
        PTOK(pthread_key_create(&panic_key, NULL));

        THR_SetName("cache-main");

        PTOK(pthread_mutex_init(&cache_vrnd_mtx, &mtxattr_errorcheck));
        VRND_Lock = cache_vrnd_lock;
        VRND_Unlock = cache_vrnd_unlock;

        VSM_Init();     /* First, LCK needs it. */

        LCK_Init();     /* Second, locking */

        Lck_New(&vxid_lock, lck_vxid);

        CLI_Init();
        PAN_Init();
        VFP_Init();

        ObjInit();

        WRK_Init();

        VCL_Init();
        VCL_VRT_Init();

        HTTP_Init();

        VBO_Init();
        VCP_Init();
        VBP_Init();
        VDI_Init();
        VBE_InitCfg();
        Pool_Init();
        V1P_Init();
        V2D_Init();

        EXP_Init();
        HSH_Init(heritage.hash);
        BAN_Init();

        VCA_Init();

        STV_open();

        VMOD_Init();

        BAN_Compile();

        VRND_SeedAll();


        CLI_AddFuncs(debug_cmds);
        CLI_AddFuncs(child_cmds);

#if WITH_PERSISTENT_STORAGE
        /* Wait for persistent storage to load if asked to */
        if (FEATURE(FEATURE_WAIT_SILO))
                SMP_Ready();
#endif

        CLI_Run();

        if (shutdown_delay > 0)
                VTIM_sleep(shutdown_delay);

        VCA_Shutdown();
        BAN_Shutdown();
        EXP_Shutdown();
        STV_close();

        printf("Child dies\n");
}

		varnish-cache/bin/varnishd/cache/cache_main.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2011 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*/
30
31		#include "config.h"
32
33		#include "cache_varnishd.h"
34		#include "acceptor/cache_acceptor.h"
35
36		#include <signal.h>
37		#include <stdio.h>
38		#include <stdlib.h>
39
40		#include <sys/mman.h>
41
42		#ifdef HAVE_PTHREAD_NP_H
43		# include <pthread_np.h>
44		#endif
45
46		#include "common/heritage.h"
47
48		#include "vcli_serve.h"
49		#include "vnum.h"
50		#include "vtim.h"
51		#include "vrnd.h"
52
53		#include "hash/hash_slinger.h"
54
55		volatile struct params *cache_param;
56		static pthread_mutex_t cache_vrnd_mtx;
57		static vtim_dur shutdown_delay = 0;
58
59		pthread_mutexattr_t mtxattr_errorcheck;
60
61		static void
62	2141450	cache_vrnd_lock(void)
63		{
64	2141450	PTOK(pthread_mutex_lock(&cache_vrnd_mtx));
65	2141450	}
66
67		static void
68	2141450	cache_vrnd_unlock(void)
69		{
70	2141450	PTOK(pthread_mutex_unlock(&cache_vrnd_mtx));
71	2141450	}
72
73		/*--------------------------------------------------------------------
74		* Per thread storage for the session currently being processed by
75		* the thread. This is used for panic messages.
76		*/
77
78		static pthread_key_t req_key;
79		static pthread_key_t bo_key;
80		static pthread_key_t wrk_key;
81		pthread_key_t witness_key;
82		pthread_key_t panic_key;
83
84		void
85	354175	THR_SetBusyobj(const struct busyobj *bo)
86		{
87
88	354175	PTOK(pthread_setspecific(bo_key, bo));
89	354175	}
90
91		struct busyobj *
92	516	THR_GetBusyobj(void)
93		{
94
95	516	return (pthread_getspecific(bo_key));
96		}
97
98		void
99	229158	THR_SetRequest(const struct req *req)
100		{
101
102	229158	PTOK(pthread_setspecific(req_key, req));
103	229158	}
104
105		struct req *
106	596	THR_GetRequest(void)
107		{
108
109	596	return (pthread_getspecific(req_key));
110		}
111
112		void
113	745975	THR_SetWorker(const struct worker *wrk)
114		{
115
116	745975	PTOK(pthread_setspecific(wrk_key, wrk));
117	745975	}
118
119		struct worker *
120	173870	THR_GetWorker(void)
121		{
122
123	173870	return (pthread_getspecific(wrk_key));
124		}
125
126		/*--------------------------------------------------------------------
127		* Name threads if our pthreads implementation supports it.
128		*/
129
130		static pthread_key_t name_key;
131
132		static void
133	1330740	thr_setname_generic(const char *name)
134		{
135		char buf[16];
136
137		/* The Linux kernel enforces a strict limitation of 15 bytes name,
138		* truncate the name if we would overflow it.
139		*/
140	1330740	if (strlen(name) > 15) {
141	36676	bprintf(buf, "%.14s~", name);
142	36676	name = buf;
143	36676	}
144
145		//lint --e{438} Last value assigned not used
146	1330740	PTOK(pthread_setname_np(pthread_self(), name));
147	1330740	}
148
149		void
150	1330755	THR_SetName(const char *name)
151		{
152
153	1330755	PTOK(pthread_setspecific(name_key, name));
154		#if defined(__APPLE__)
155		(void)pthread_setname_np(name);
156		#elif defined(__NetBSD__)
157		(void)pthread_setname_np(pthread_self(), "%s", (char *)(uintptr_t)name);
158		#else
159	1330755	thr_setname_generic(name);
160		#endif
161	1330755	}
162
163		const char *
164	516	THR_GetName(void)
165		{
166
167	516	return (pthread_getspecific(name_key));
168		}
169
170		/*--------------------------------------------------------------------
171		* Generic setup all our threads should call
172		*/
173		static stack_t altstack;
174
175		void
176	1330622	THR_Init(void)
177		{
178	1330622	if (altstack.ss_sp != NULL)
179	1329290	AZ(sigaltstack(&altstack, NULL));
180	1330622	}
181
182		/*--------------------------------------------------------------------
183		* VXID's are unique transaction numbers allocated with a minimum of
184		* locking overhead via pools in the worker threads.
185		*
186		* VXID's are mostly for use in VSL and for that reason we never return
187		* zero vxid, in order to reserve that for "unassociated" VSL records.
188		*/
189
190		static uint64_t vxid_base = 1;
191		static uint32_t vxid_chunk = 32768;
192		static struct lock vxid_lock;
193
194		vxid_t
195	324808	VXID_Get(const struct worker *wrk, uint64_t mask)
196		{
197		struct vxid_pool *v;
198		vxid_t retval;
199
200	324808	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
201	324808	CHECK_OBJ_NOTNULL(wrk->wpriv, WORKER_PRIV_MAGIC);
202	324808	v = wrk->wpriv->vxid_pool;
203	324808	AZ(mask & VSL_IDENTMASK);
204	649216	while (v->count == 0 \|\| v->next >= VRT_INTEGER_MAX) {
205	324408	Lck_Lock(&vxid_lock);
206	324408	v->next = vxid_base;
207	324408	v->count = vxid_chunk;
208	324408	vxid_base += v->count;
209	324408	if (vxid_base >= VRT_INTEGER_MAX)
210	80	vxid_base = 1;
211	324408	Lck_Unlock(&vxid_lock);
212		}
213	324808	v->count--;
214	324808	assert(v->next > 0);
215	324808	assert(v->next < VSL_CLIENTMARKER);
216	324808	retval.vxid = v->next \| mask;
217	324808	v->next++;
218	324808	return (retval);
219		}
220
221		/*--------------------------------------------------------------------
222		* Debugging aids
223		*/
224
225		/*
226		* Dumb down the VXID allocation to make it predictable for
227		* varnishtest cases
228		*/
229		static void v_matchproto_(cli_func_t)
230	36360	cli_debug_xid(struct cli cli, const char const av, void priv)
231		{
232	36360	(void)priv;
233	36360	if (av[2] != NULL) {
234	36360	vxid_base = strtoull(av[2], NULL, 0);
235	36360	vxid_chunk = 0;
236	36360	if (av[3] != NULL)
237	0	vxid_chunk = strtoul(av[3], NULL, 0);
238	36360	if (vxid_chunk == 0)
239	36360	vxid_chunk = 1;
240	36360	}
241	36360	VCLI_Out(cli, "XID is %ju chunk %u", (uintmax_t)vxid_base, vxid_chunk);
242	36360	}
243
244		/*
245		* Artificially slow down the process shutdown.
246		*/
247		static void v_matchproto_(cli_func_t)
248	0	cli_debug_shutdown_delay(struct cli cli, const char const av, void priv)
249		{
250
251	0	(void)cli;
252	0	(void)priv;
253	0	shutdown_delay = VNUM_duration(av[2]);
254	0	}
255
256		/*
257		* Default to seed=1, this is the only seed value POSIX guarantees will
258		* result in a reproducible random number sequence.
259		*/
260		static void v_matchproto_(cli_func_t)
261	120	cli_debug_srandom(struct cli cli, const char const av, void priv)
262		{
263	120	unsigned seed = 1;
264
265	120	(void)priv;
266	120	(void)cli;
267	120	if (av[2] != NULL)
268	0	seed = strtoul(av[2], NULL, 0);
269	120	VRND_SeedTestable(seed);
270	120	}
271
272		static struct cli_proto debug_cmds[] = {
273		{ CLICMD_DEBUG_XID, "d", cli_debug_xid },
274		{ CLICMD_DEBUG_SHUTDOWN_DELAY, "d", cli_debug_shutdown_delay },
275		{ CLICMD_DEBUG_SRANDOM, "d", cli_debug_srandom },
276		{ NULL }
277		};
278
279		/*--------------------------------------------------------------------
280		* XXX: Think more about which order we start things
281		*/
282
283		#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
284		static void
285	0	child_malloc_fail(void p, const char s)
286		{
287	0	VSL(SLT_Error, NO_VXID, "MALLOC ERROR: %s (%p)", s, p);
288	0	fprintf(stderr, "MALLOC ERROR: %s (%p)\n", s, p);
289	0	WRONG("Malloc Error");
290	0	}
291		#endif
292
293		/*=====================================================================
294		* signal handler for child process
295		*/
296
297		static void v_noreturn_ v_matchproto_()
298	80	child_signal_handler(int s, siginfo_t si, void c)
299		{
300		char buf[1024];
301		struct sigaction sa;
302		struct req *req;
303	80	const char a, p, *info = NULL;
304
305	80	(void)c;
306		/* Don't come back */
307	80	memset(&sa, 0, sizeof sa);
308	80	sa.sa_handler = SIG_DFL;
309	80	(void)sigaction(SIGSEGV, &sa, NULL);
310	80	(void)sigaction(SIGBUS, &sa, NULL);
311	80	(void)sigaction(SIGABRT, &sa, NULL);
312
313	80	while (s == SIGSEGV \|\| s == SIGBUS) {
314	80	req = THR_GetRequest();
315	80	if (req == NULL \|\| req->wrk == NULL)
316	0	break;
317	80	a = TRUST_ME(si->si_addr);
318	80	p = TRUST_ME(req->wrk);
319	80	p += sizeof *req->wrk;
320		// rough safe estimate - top of stack
321	80	if (a > p + cache_param->wthread_stacksize)
322	0	break;
323	80	if (a < p - 2 * cache_param->wthread_stacksize)
324	40	break;
325	40	info = "\nTHIS PROBABLY IS A STACK OVERFLOW - "
326		"check thread_pool_stack parameter";
327	40	break;
328		}
329	80	bprintf(buf, "Signal %d (%s) received at %p si_code %d%s",
330		s, strsignal(s), si->si_addr, si->si_code,
331		info ? info : "");
332
333	80	VAS_Fail(__func__,
334		__FILE__,
335		__LINE__,
336	80	buf,
337		VAS_WRONG);
338		}
339
340		/*=====================================================================
341		* Magic for panicking properly on signals
342		*/
343
344		static void
345	36636	child_sigmagic(size_t altstksz)
346		{
347		struct sigaction sa;
348
349	36636	memset(&sa, 0, sizeof sa);
350
351	36636	size_t sz = vmax_t(size_t, SIGSTKSZ + 4096, altstksz);
352	36636	altstack.ss_sp = mmap(NULL, sz, PROT_READ \| PROT_WRITE,
353		MAP_PRIVATE \| MAP_ANONYMOUS,
354		-1, 0);
355	36636	AN(altstack.ss_sp != MAP_FAILED);
356	36636	AN(altstack.ss_sp);
357	36636	altstack.ss_size = sz;
358	36636	altstack.ss_flags = 0;
359	36636	sa.sa_flags \|= SA_ONSTACK;
360
361	36636	THR_Init();
362
363	36636	sa.sa_sigaction = child_signal_handler;
364	36636	sa.sa_flags \|= SA_SIGINFO;
365	36636	(void)sigaction(SIGBUS, &sa, NULL);
366	36636	(void)sigaction(SIGABRT, &sa, NULL);
367	36636	(void)sigaction(SIGSEGV, &sa, NULL);
368	36636	}
369
370		static void
371	85	cli_quit(int sig)
372		{
373
374	85	if (!IS_CLI()) {
375	0	PTOK(pthread_kill(cli_thread, sig));
376	0	return;
377		}
378
379	85	WRONG("It's time for the big quit");
380	0	}
381
382		/*=====================================================================
383		* Run the child process
384		*/
385
386		static void v_matchproto_(cli_func_t)
387	36480	ccf_child_start(struct cli cli, const char const av, void priv)
388		{
389	36480	(void)av;
390	36480	(void)priv;
391
392	36480	VCA_Start(cli);
393	36480	}
394
395		static struct cli_proto child_cmds[] = {
396		{ CLICMD_SERVER_START, "", ccf_child_start },
397		{ NULL }
398		};
399
400		void
401	36676	child_main(int sigmagic, size_t altstksz)
402		{
403
404	36676	if (sigmagic)
405	36636	child_sigmagic(altstksz);
406	36676	(void)signal(SIGINT, SIG_DFL);
407	36676	(void)signal(SIGTERM, SIG_DFL);
408	36676	(void)signal(SIGQUIT, cli_quit);
409
410		#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
411	36676	malloc_message = child_malloc_fail;
412		#endif
413
414		/* Before anything uses pthreads in anger */
415	36676	PTOK(pthread_mutexattr_init(&mtxattr_errorcheck));
416	36676	PTOK(pthread_mutexattr_settype(&mtxattr_errorcheck, PTHREAD_MUTEX_ERRORCHECK));
417
418	36676	cache_param = heritage.param;
419
420	36676	PTOK(pthread_key_create(&req_key, NULL));
421	36676	PTOK(pthread_key_create(&bo_key, NULL));
422	36676	PTOK(pthread_key_create(&wrk_key, NULL));
423	36676	PTOK(pthread_key_create(&witness_key, free));
424	36676	PTOK(pthread_key_create(&name_key, NULL));
425	36676	PTOK(pthread_key_create(&panic_key, NULL));
426
427	36676	THR_SetName("cache-main");
428
429	36676	PTOK(pthread_mutex_init(&cache_vrnd_mtx, &mtxattr_errorcheck));
430	36676	VRND_Lock = cache_vrnd_lock;
431	36676	VRND_Unlock = cache_vrnd_unlock;
432
433	36676	VSM_Init(); /* First, LCK needs it. */
434
435	36676	LCK_Init(); /* Second, locking */
436
437	36676	Lck_New(&vxid_lock, lck_vxid);
438
439	36676	CLI_Init();
440	36676	PAN_Init();
441	36676	VFP_Init();
442
443	36676	ObjInit();
444
445	36676	WRK_Init();
446
447	36676	VCL_Init();
448	36676	VCL_VRT_Init();
449
450	36676	HTTP_Init();
451
452	36676	VBO_Init();
453	36676	VCP_Init();
454	36676	VBP_Init();
455	36676	VDI_Init();
456	36676	VBE_InitCfg();
457	36676	Pool_Init();
458	36676	V1P_Init();
459	36676	V2D_Init();
460
461	36676	EXP_Init();
462	36676	HSH_Init(heritage.hash);
463	36676	BAN_Init();
464
465	36676	VCA_Init();
466
467	36676	STV_open();
468
469	36676	VMOD_Init();
470
471	36676	BAN_Compile();
472
473	36676	VRND_SeedAll();
474
475
476	36676	CLI_AddFuncs(debug_cmds);
477	36676	CLI_AddFuncs(child_cmds);
478
479		#if WITH_PERSISTENT_STORAGE
480		/* Wait for persistent storage to load if asked to */
481	36676	if (FEATURE(FEATURE_WAIT_SILO))
482	960	SMP_Ready();
483		#endif
484
485	36676	CLI_Run();
486
487	36676	if (shutdown_delay > 0)
488	0	VTIM_sleep(shutdown_delay);
489
490	36676	VCA_Shutdown();
491	36676	BAN_Shutdown();
492	36676	EXP_Shutdown();
493	36676	STV_close();
494
495	36676	printf("Child dies\n");
496	36676	}