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;

#if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) &&  \
    !defined(__NetBSD__)
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));
}
#endif

void
THR_SetName(const char *name)
{

        PTOK(pthread_setspecific(name_key, name));
#if defined(HAVE_PTHREAD_SETNAME_NP)
#  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
#elif defined(HAVE_PTHREAD_SET_NAME_NP)
        (void)pthread_set_name_np(pthread_self(), 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);

#ifdef 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	53453	cache_vrnd_lock(void)
63		{
64	53453	PTOK(pthread_mutex_lock(&cache_vrnd_mtx));
65	53453	}
66
67		static void
68	53453	cache_vrnd_unlock(void)
69		{
70	53453	PTOK(pthread_mutex_unlock(&cache_vrnd_mtx));
71	53453	}
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	9039	THR_SetBusyobj(const struct busyobj *bo)
86		{
87
88	9039	PTOK(pthread_setspecific(bo_key, bo));
89	9039	}
90
91		struct busyobj *
92	13	THR_GetBusyobj(void)
93		{
94
95	13	return (pthread_getspecific(bo_key));
96		}
97
98		void
99	5880	THR_SetRequest(const struct req *req)
100		{
101
102	5880	PTOK(pthread_setspecific(req_key, req));
103	5880	}
104
105		struct req *
106	15	THR_GetRequest(void)
107		{
108
109	15	return (pthread_getspecific(req_key));
110		}
111
112		void
113	18970	THR_SetWorker(const struct worker *wrk)
114		{
115
116	18970	PTOK(pthread_setspecific(wrk_key, wrk));
117	18970	}
118
119		struct worker *
120	4341	THR_GetWorker(void)
121		{
122
123	4341	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		#if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) && \
133		!defined(__NetBSD__)
134		static void
135	33879	thr_setname_generic(const char *name)
136		{
137		char buf[16];
138
139		/* The Linux kernel enforces a strict limitation of 15 bytes name,
140		* truncate the name if we would overflow it.
141		*/
142	33879	if (strlen(name) > 15) {
143	935	bprintf(buf, "%.14s~", name);
144	935	name = buf;
145	935	}
146
147		//lint --e{438} Last value assigned not used
148	33879	PTOK(pthread_setname_np(pthread_self(), name));
149	33879	}
150		#endif
151
152		void
153	33879	THR_SetName(const char *name)
154		{
155
156	33879	PTOK(pthread_setspecific(name_key, name));
157		#if defined(HAVE_PTHREAD_SETNAME_NP)
158		# if defined(__APPLE__)
159		(void)pthread_setname_np(name);
160		# elif defined(__NetBSD__)
161		(void)pthread_setname_np(pthread_self(), "%s", (char *)(uintptr_t)name);
162		# else
163	33879	thr_setname_generic(name);
164		# endif
165		#elif defined(HAVE_PTHREAD_SET_NAME_NP)
166		(void)pthread_set_name_np(pthread_self(), name);
167		#endif
168	33879	}
169
170		const char *
171	13	THR_GetName(void)
172		{
173
174	13	return (pthread_getspecific(name_key));
175		}
176
177		/*--------------------------------------------------------------------
178		* Generic setup all our threads should call
179		*/
180		static stack_t altstack;
181
182		void
183	33876	THR_Init(void)
184		{
185	33876	if (altstack.ss_sp != NULL)
186	33842	AZ(sigaltstack(&altstack, NULL));
187	33876	}
188
189		/*--------------------------------------------------------------------
190		* VXID's are unique transaction numbers allocated with a minimum of
191		* locking overhead via pools in the worker threads.
192		*
193		* VXID's are mostly for use in VSL and for that reason we never return
194		* zero vxid, in order to reserve that for "unassociated" VSL records.
195		*/
196
197		static uint64_t vxid_base = 1;
198		static uint32_t vxid_chunk = 32768;
199		static struct lock vxid_lock;
200
201		vxid_t
202	8299	VXID_Get(const struct worker *wrk, uint64_t mask)
203		{
204		struct vxid_pool *v;
205		vxid_t retval;
206
207	8299	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
208	8299	CHECK_OBJ_NOTNULL(wrk->wpriv, WORKER_PRIV_MAGIC);
209	8299	v = wrk->wpriv->vxid_pool;
210	8299	AZ(mask & VSL_IDENTMASK);
211	16588	while (v->count == 0 \|\| v->next >= VRT_INTEGER_MAX) {
212	8289	Lck_Lock(&vxid_lock);
213	8289	v->next = vxid_base;
214	8289	v->count = vxid_chunk;
215	8289	vxid_base += v->count;
216	8289	if (vxid_base >= VRT_INTEGER_MAX)
217	2	vxid_base = 1;
218	8289	Lck_Unlock(&vxid_lock);
219		}
220	8299	v->count--;
221	8299	assert(v->next > 0);
222	8299	assert(v->next < VSL_CLIENTMARKER);
223	8299	retval.vxid = v->next \| mask;
224	8299	v->next++;
225	8299	return (retval);
226		}
227
228		/*--------------------------------------------------------------------
229		* Debugging aids
230		*/
231
232		/*
233		* Dumb down the VXID allocation to make it predictable for
234		* varnishtest cases
235		*/
236		static void v_matchproto_(cli_func_t)
237	927	cli_debug_xid(struct cli cli, const char const av, void priv)
238		{
239	927	(void)priv;
240	927	if (av[2] != NULL) {
241	927	vxid_base = strtoull(av[2], NULL, 0);
242	927	vxid_chunk = 0;
243	927	if (av[3] != NULL)
244	0	vxid_chunk = strtoul(av[3], NULL, 0);
245	927	if (vxid_chunk == 0)
246	927	vxid_chunk = 1;
247	927	}
248	927	VCLI_Out(cli, "XID is %ju chunk %u", (uintmax_t)vxid_base, vxid_chunk);
249	927	}
250
251		/*
252		* Artificially slow down the process shutdown.
253		*/
254		static void v_matchproto_(cli_func_t)
255	0	cli_debug_shutdown_delay(struct cli cli, const char const av, void priv)
256		{
257
258	0	(void)cli;
259	0	(void)priv;
260	0	shutdown_delay = VNUM_duration(av[2]);
261	0	}
262
263		/*
264		* Default to seed=1, this is the only seed value POSIX guarantees will
265		* result in a reproducible random number sequence.
266		*/
267		static void v_matchproto_(cli_func_t)
268	3	cli_debug_srandom(struct cli cli, const char const av, void priv)
269		{
270	3	unsigned seed = 1;
271
272	3	(void)priv;
273	3	(void)cli;
274	3	if (av[2] != NULL)
275	0	seed = strtoul(av[2], NULL, 0);
276	3	VRND_SeedTestable(seed);
277	3	}
278
279		static struct cli_proto debug_cmds[] = {
280		{ CLICMD_DEBUG_XID, "d", cli_debug_xid },
281		{ CLICMD_DEBUG_SHUTDOWN_DELAY, "d", cli_debug_shutdown_delay },
282		{ CLICMD_DEBUG_SRANDOM, "d", cli_debug_srandom },
283		{ NULL }
284		};
285
286		/*--------------------------------------------------------------------
287		* XXX: Think more about which order we start things
288		*/
289
290		#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
291		static void
292	0	child_malloc_fail(void p, const char s)
293		{
294	0	VSL(SLT_Error, NO_VXID, "MALLOC ERROR: %s (%p)", s, p);
295	0	fprintf(stderr, "MALLOC ERROR: %s (%p)\n", s, p);
296	0	WRONG("Malloc Error");
297	0	}
298		#endif
299
300		/*=====================================================================
301		* signal handler for child process
302		*/
303
304		static void v_noreturn_ v_matchproto_()
305	2	child_signal_handler(int s, siginfo_t si, void c)
306		{
307		char buf[1024];
308		struct sigaction sa;
309		struct req *req;
310	2	const char a, p, *info = NULL;
311
312	2	(void)c;
313		/* Don't come back */
314	2	memset(&sa, 0, sizeof sa);
315	2	sa.sa_handler = SIG_DFL;
316	2	(void)sigaction(SIGSEGV, &sa, NULL);
317	2	(void)sigaction(SIGBUS, &sa, NULL);
318	2	(void)sigaction(SIGABRT, &sa, NULL);
319
320	2	while (s == SIGSEGV \|\| s == SIGBUS) {
321	2	req = THR_GetRequest();
322	2	if (req == NULL \|\| req->wrk == NULL)
323	0	break;
324	2	a = TRUST_ME(si->si_addr);
325	2	p = TRUST_ME(req->wrk);
326	2	p += sizeof *req->wrk;
327		// rough safe estimate - top of stack
328	2	if (a > p + cache_param->wthread_stacksize)
329	0	break;
330	2	if (a < p - 2 * cache_param->wthread_stacksize)
331	1	break;
332	1	info = "\nTHIS PROBABLY IS A STACK OVERFLOW - "
333		"check thread_pool_stack parameter";
334	1	break;
335		}
336	2	bprintf(buf, "Signal %d (%s) received at %p si_code %d%s",
337		s, strsignal(s), si->si_addr, si->si_code,
338		info ? info : "");
339
340	2	VAS_Fail(__func__,
341		__FILE__,
342		__LINE__,
343	2	buf,
344		VAS_WRONG);
345		}
346
347		/*=====================================================================
348		* Magic for panicking properly on signals
349		*/
350
351		static void
352	934	child_sigmagic(size_t altstksz)
353		{
354		struct sigaction sa;
355
356	934	memset(&sa, 0, sizeof sa);
357
358	934	size_t sz = vmax_t(size_t, SIGSTKSZ + 4096, altstksz);
359	934	altstack.ss_sp = mmap(NULL, sz, PROT_READ \| PROT_WRITE,
360		MAP_PRIVATE \| MAP_ANONYMOUS,
361		-1, 0);
362	934	AN(altstack.ss_sp != MAP_FAILED);
363	934	AN(altstack.ss_sp);
364	934	altstack.ss_size = sz;
365	934	altstack.ss_flags = 0;
366	934	sa.sa_flags \|= SA_ONSTACK;
367
368	934	THR_Init();
369
370	934	sa.sa_sigaction = child_signal_handler;
371	934	sa.sa_flags \|= SA_SIGINFO;
372	934	(void)sigaction(SIGBUS, &sa, NULL);
373	934	(void)sigaction(SIGABRT, &sa, NULL);
374	934	(void)sigaction(SIGSEGV, &sa, NULL);
375	934	}
376
377		static void
378	2	cli_quit(int sig)
379		{
380
381	2	if (!IS_CLI()) {
382	0	PTOK(pthread_kill(cli_thread, sig));
383	0	return;
384		}
385
386	2	WRONG("It's time for the big quit");
387	0	}
388
389		/*=====================================================================
390		* Run the child process
391		*/
392
393		static void v_matchproto_(cli_func_t)
394	930	ccf_child_start(struct cli cli, const char const av, void priv)
395		{
396	930	(void)av;
397	930	(void)priv;
398
399	930	VCA_Start(cli);
400	930	}
401
402		static struct cli_proto child_cmds[] = {
403		{ CLICMD_SERVER_START, "", ccf_child_start },
404		{ NULL }
405		};
406
407		void
408	935	child_main(int sigmagic, size_t altstksz)
409		{
410
411	935	if (sigmagic)
412	934	child_sigmagic(altstksz);
413	935	(void)signal(SIGINT, SIG_DFL);
414	935	(void)signal(SIGTERM, SIG_DFL);
415	935	(void)signal(SIGQUIT, cli_quit);
416
417		#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
418	935	malloc_message = child_malloc_fail;
419		#endif
420
421		/* Before anything uses pthreads in anger */
422	935	PTOK(pthread_mutexattr_init(&mtxattr_errorcheck));
423	935	PTOK(pthread_mutexattr_settype(&mtxattr_errorcheck, PTHREAD_MUTEX_ERRORCHECK));
424
425	935	cache_param = heritage.param;
426
427	935	PTOK(pthread_key_create(&req_key, NULL));
428	935	PTOK(pthread_key_create(&bo_key, NULL));
429	935	PTOK(pthread_key_create(&wrk_key, NULL));
430	935	PTOK(pthread_key_create(&witness_key, free));
431	935	PTOK(pthread_key_create(&name_key, NULL));
432	935	PTOK(pthread_key_create(&panic_key, NULL));
433
434	935	THR_SetName("cache-main");
435
436	935	PTOK(pthread_mutex_init(&cache_vrnd_mtx, &mtxattr_errorcheck));
437	935	VRND_Lock = cache_vrnd_lock;
438	935	VRND_Unlock = cache_vrnd_unlock;
439
440	935	VSM_Init(); /* First, LCK needs it. */
441
442	935	LCK_Init(); /* Second, locking */
443
444	935	Lck_New(&vxid_lock, lck_vxid);
445
446	935	CLI_Init();
447	935	PAN_Init();
448	935	VFP_Init();
449
450	935	ObjInit();
451
452	935	WRK_Init();
453
454	935	VCL_Init();
455	935	VCL_VRT_Init();
456
457	935	HTTP_Init();
458
459	935	VBO_Init();
460	935	VCP_Init();
461	935	VBP_Init();
462	935	VDI_Init();
463	935	VBE_InitCfg();
464	935	Pool_Init();
465	935	V1P_Init();
466	935	V2D_Init();
467
468	935	EXP_Init();
469	935	HSH_Init(heritage.hash);
470	935	BAN_Init();
471
472	935	VCA_Init();
473
474	935	STV_open();
475
476	935	VMOD_Init();
477
478	935	BAN_Compile();
479
480	935	VRND_SeedAll();
481
482
483	935	CLI_AddFuncs(debug_cmds);
484	935	CLI_AddFuncs(child_cmds);
485
486		#ifdef WITH_PERSISTENT_STORAGE
487		/* Wait for persistent storage to load if asked to */
488	935	if (FEATURE(FEATURE_WAIT_SILO))
489	24	SMP_Ready();
490		#endif
491
492	935	CLI_Run();
493
494	935	if (shutdown_delay > 0)
495	0	VTIM_sleep(shutdown_delay);
496
497	935	VCA_Shutdown();
498	935	BAN_Shutdown();
499	935	EXP_Shutdown();