GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2019 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 <stdio.h>

#include "cache_varnishd.h"

#include "vcl.h"
#include "vbm.h"

#include "vcc_interface.h"

#include "cache_vcl.h"

/*--------------------------------------------------------------------
 * Private & exclusive interfaces between VCC and varnishd
 */

const size_t vpi_wrk_len = sizeof(struct wrk_vpi);

void
VPI_wrk_init(struct worker *wrk, void *p, size_t spc)
{
        struct wrk_vpi *vpi = p;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        AN(vpi);
        assert(spc >= sizeof *vpi);
        INIT_OBJ(vpi, WRK_VPI_MAGIC);
        wrk->vpi = vpi;
}

void
VPI_trace(VRT_CTX, unsigned u)
{

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
        CHECK_OBJ_NOTNULL(ctx->vcl->conf, VCL_CONF_MAGIC);
        assert(u < ctx->vcl->conf->nref);
        if (ctx->vsl != NULL)
                VSLb(ctx->vsl, SLT_VCL_trace, "%s %u %u.%u.%u",
                    ctx->vcl->loaded_name, u, ctx->vcl->conf->ref[u].source,
                    ctx->vcl->conf->ref[u].line, ctx->vcl->conf->ref[u].pos);
        else
                VSL(SLT_VCL_trace, NO_VXID, "%s %u %u.%u.%u",
                    ctx->vcl->loaded_name, u, ctx->vcl->conf->ref[u].source,
                    ctx->vcl->conf->ref[u].line, ctx->vcl->conf->ref[u].pos);
}

static void
vpi_ref_panic(struct vsb *vsb, unsigned n, const struct vcl *vcl)
{
        const struct VCL_conf *conf = NULL;
        const struct vpi_ref *ref;
        const char *p, *src = NULL;
        const int lim = 40;
        const char *abbstr = "[...]";
        char buf[lim + sizeof(abbstr)];
        int w = 0;

        AN(vsb);

        if (vcl != NULL)
                conf = vcl->conf;
        if (conf != NULL && conf->magic != VCL_CONF_MAGIC)
                conf = NULL;

        if (conf == NULL) {
                VSB_printf(vsb, "ref = %u, nref = ?,\n", n);
                return;
        }
        if (n >= conf->nref) {
                VSB_printf(vsb, "ref = %u *invalid*, nref = %u\n",
                    n, conf->nref);
                return;
        }

        VSB_printf(vsb, "ref = %u,\n", n);

        ref = &conf->ref[n];
        if (PAN_dump_struct(vsb, ref, VPI_REF_MAGIC, "vpi_ref"))
                return;

        if (ref->source < conf->nsrc) {
                VSB_printf(vsb, "source = %u (\"%s\"),\n", ref->source,
                    conf->srcname[ref->source]);
                src = conf->srcbody[ref->source];
        } else {
                VSB_printf(vsb, "source = %u *invalid*,\n", ref->source);
        }

        if (src != NULL) {
                w = strlen(src);
                assert(w > 0);
                if (ref->offset >= (unsigned)w)
                        src = NULL;
        }
        if (src != NULL) {
                src += ref->offset;
                p = strchr(src, '\n');
                if (p != NULL)
                        w = p - src;
                else
                        w -= ref->offset;
                if (w > lim) {
                        w = snprintf(buf, sizeof buf, "%.*s%s",
                            lim, src, abbstr);
                        src = buf;
                }
        }

        VSB_printf(vsb, "offset = %u,\n", ref->offset);
        VSB_printf(vsb, "line = %u,\n", ref->line);
        VSB_printf(vsb, "pos = %u,\n", ref->pos);
        if (src != NULL) {
                VSB_cat(vsb, "src = ");
                VSB_quote(vsb, src, w, VSB_QUOTE_CSTR);
                VSB_putc(vsb, '\n');
        } else {
                VSB_printf(vsb, "token = \"%s\"\n", ref->token);
        }
        VSB_indent(vsb, -2);
        VSB_cat(vsb, "},\n");

}
void
VPI_Panic(struct vsb *vsb, const struct wrk_vpi *vpi, const struct vcl *vcl)
{
        const char *hand;

        AN(vsb);
        if (PAN_dump_struct(vsb, vpi, WRK_VPI_MAGIC, "vpi"))
                return;

        hand = VCL_Return_Name(vpi->handling);
        if (vpi->handling == 0)
                hand = "none";
        else if (hand == NULL)
                hand = "*invalid*";

        VSB_printf(vsb, "handling (VCL::return) = 0x%x (%s),\n",
            vpi->handling, hand);

        vpi_ref_panic(vsb, vpi->ref, vcl);

        VSB_indent(vsb, -2);
        VSB_cat(vsb, "},\n");
}

/*
 * After vcl_fini {} == VGC_function_vcl_fini() is called from VGC_Discard(),
 * handling must either be OK from VCL "return (ok)" or FAIL from VRT_fail().
 *
 * replace OK with 0 for _fini callbacks because that handling has meaning only
 * when returning from VCL subs
 */

void
VPI_vcl_fini(VRT_CTX)
{
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        AN(ctx->vpi);

        if (ctx->vpi->handling == VCL_RET_FAIL)
                return;
        assert(ctx->vpi->handling == VCL_RET_OK);
        ctx->vpi->handling = 0;
}

VCL_VCL
VPI_vcl_get(VRT_CTX, const char *name)
{
        VCL_VCL vcl;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        vcl = vcl_find(name);
        AN(vcl);
        Lck_Lock(&vcl_mtx);
        vcl->nrefs++;
        Lck_Unlock(&vcl_mtx);
        return (vcl);
}

void
VPI_vcl_rel(VRT_CTX, VCL_VCL vcl)
{
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        AN(vcl);
        Lck_Lock(&vcl_mtx);
        vcl->nrefs--;
        Lck_Unlock(&vcl_mtx);
}

void
VPI_vcl_select(VRT_CTX, VCL_VCL vcl)
{
        struct req *req = ctx->req;

        CHECK_OBJ_NOTNULL(vcl, VCL_MAGIC);
        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        CHECK_OBJ_NOTNULL(req->top, REQTOP_MAGIC);

        if ((IS_TOPREQ(req) && req->top->vcl0 != NULL) || req->restarts > 0)
                return;         // Illegal, req-FSM will fail this later.

        if (! IS_TOPREQ(req))
                assert(req->vcl == req->top->vcl0);

        Req_Rollback(ctx);

        if (IS_TOPREQ(req)) {
                AN(req->top);
                AZ(req->top->vcl0);
                req->top->vcl0 = req->vcl;
                req->vcl = NULL;
        }
        VCL_Update(&req->vcl, vcl);
        VSLb(ctx->req->vsl, SLT_VCL_use, "%s via %s",
            req->vcl->loaded_name, vcl->loaded_name);
}

void v_noreturn_
VPI_Fail(const char *func, const char *file, int line,
    const char *cond)
{
        VAS_Fail(func, file, line, cond, VAS_ASSERT);
}

enum vcl_func_fail_e
VPI_Call_Check(VRT_CTX, const struct VCL_conf *conf,
    unsigned methods, unsigned n)
{
        struct vbitmap *vbm;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);

        assert(conf == ctx->vcl->conf);

        vbm = ctx->called;
        AN(vbm);

        if ((methods & ctx->method) == 0)
                return (VSUB_E_METHOD);

        if (vbit_test(vbm, n))
                return (VSUB_E_RECURSE);

        return (VSUB_E_OK);
}

void
VPI_Call_Begin(VRT_CTX, unsigned n)
{
        struct vbitmap *vbm;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        vbm = ctx->called;
        AN(vbm);
        vbit_set(vbm, n);
}

void
VPI_Call_End(VRT_CTX, unsigned n)
{
        struct vbitmap *vbm;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        vbm = ctx->called;
        AN(vbm);
        vbit_clr(vbm, n);
}

		varnish-cache/bin/varnishd/cache/cache_vpi.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2019 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
32		#include "config.h"
33
34		#include <stdio.h>
35
36		#include "cache_varnishd.h"
37
38		#include "vcl.h"
39		#include "vbm.h"
40
41		#include "vcc_interface.h"
42
43		#include "cache_vcl.h"
44
45		/*--------------------------------------------------------------------
46		* Private & exclusive interfaces between VCC and varnishd
47		*/
48
49		const size_t vpi_wrk_len = sizeof(struct wrk_vpi);
50
51		void
52	93470	VPI_wrk_init(struct worker wrk, void p, size_t spc)
53		{
54	93470	struct wrk_vpi *vpi = p;
55
56	93470	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
57	93470	AN(vpi);
58	93470	assert(spc >= sizeof *vpi);
59	93470	INIT_OBJ(vpi, WRK_VPI_MAGIC);
60	93470	wrk->vpi = vpi;
61	93470	}
62
63		void
64	1380	VPI_trace(VRT_CTX, unsigned u)
65		{
66
67	1380	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
68	1380	CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
69	1380	CHECK_OBJ_NOTNULL(ctx->vcl->conf, VCL_CONF_MAGIC);
70	1380	assert(u < ctx->vcl->conf->nref);
71	1380	if (ctx->vsl != NULL)
72	2700	VSLb(ctx->vsl, SLT_VCL_trace, "%s %u %u.%u.%u",
73	1350	ctx->vcl->loaded_name, u, ctx->vcl->conf->ref[u].source,
74	1350	ctx->vcl->conf->ref[u].line, ctx->vcl->conf->ref[u].pos);
75		else
76	60	VSL(SLT_VCL_trace, NO_VXID, "%s %u %u.%u.%u",
77	30	ctx->vcl->loaded_name, u, ctx->vcl->conf->ref[u].source,
78	30	ctx->vcl->conf->ref[u].line, ctx->vcl->conf->ref[u].pos);
79	1380	}
80
81		static void
82	35	vpi_ref_panic(struct vsb vsb, unsigned n, const struct vcl vcl)
83		{
84	35	const struct VCL_conf *conf = NULL;
85		const struct vpi_ref *ref;
86	35	const char p, src = NULL;
87	35	const int lim = 40;
88	35	const char *abbstr = "[...]";
89	35	char buf[lim + sizeof(abbstr)];
90	35	int w = 0;
91
92	35	AN(vsb);
93
94	35	if (vcl != NULL)
95	35	conf = vcl->conf;
96	35	if (conf != NULL && conf->magic != VCL_CONF_MAGIC)
97	0	conf = NULL;
98
99	35	if (conf == NULL) {
100	0	VSB_printf(vsb, "ref = %u, nref = ?,\n", n);
101	0	return;
102		}
103	35	if (n >= conf->nref) {
104	0	VSB_printf(vsb, "ref = %u invalid, nref = %u\n",
105	0	n, conf->nref);
106	0	return;
107		}
108
109	35	VSB_printf(vsb, "ref = %u,\n", n);
110
111	35	ref = &conf->ref[n];
112	35	if (PAN_dump_struct(vsb, ref, VPI_REF_MAGIC, "vpi_ref"))
113	0	return;
114
115	35	if (ref->source < conf->nsrc) {
116	70	VSB_printf(vsb, "source = %u (\"%s\"),\n", ref->source,
117	35	conf->srcname[ref->source]);
118	35	src = conf->srcbody[ref->source];
119	35	} else {
120	0	VSB_printf(vsb, "source = %u invalid,\n", ref->source);
121		}
122
123	35	if (src != NULL) {
124	35	w = strlen(src);
125	35	assert(w > 0);
126	35	if (ref->offset >= (unsigned)w)
127	0	src = NULL;
128	35	}
129	35	if (src != NULL) {
130	35	src += ref->offset;
131	35	p = strchr(src, '\n');
132	35	if (p != NULL)
133	35	w = p - src;
134		else
135	0	w -= ref->offset;
136	35	if (w > lim) {
137	10	w = snprintf(buf, sizeof buf, "%.*s%s",
138	10	lim, src, abbstr);
139	10	src = buf;
140	10	}
141	35	}
142
143	35	VSB_printf(vsb, "offset = %u,\n", ref->offset);
144	35	VSB_printf(vsb, "line = %u,\n", ref->line);
145	35	VSB_printf(vsb, "pos = %u,\n", ref->pos);
146	35	if (src != NULL) {
147	35	VSB_cat(vsb, "src = ");
148	35	VSB_quote(vsb, src, w, VSB_QUOTE_CSTR);
149	35	VSB_putc(vsb, '\n');
150	35	} else {
151	0	VSB_printf(vsb, "token = \"%s\"\n", ref->token);
152		}
153	35	VSB_indent(vsb, -2);
154	35	VSB_cat(vsb, "},\n");
155
156	35	}
157		void
158	35	VPI_Panic(struct vsb vsb, const struct wrk_vpi vpi, const struct vcl *vcl)
159		{
160		const char *hand;
161
162	35	AN(vsb);
163	35	if (PAN_dump_struct(vsb, vpi, WRK_VPI_MAGIC, "vpi"))
164	0	return;
165
166	35	hand = VCL_Return_Name(vpi->handling);
167	35	if (vpi->handling == 0)
168	35	hand = "none";
169	0	else if (hand == NULL)
170	0	hand = "invalid";
171
172	70	VSB_printf(vsb, "handling (VCL::return) = 0x%x (%s),\n",
173	35	vpi->handling, hand);
174
175	35	vpi_ref_panic(vsb, vpi->ref, vcl);
176
177	35	VSB_indent(vsb, -2);
178	35	VSB_cat(vsb, "},\n");
179	35	}
180
181		/*
182		* After vcl_fini {} == VGC_function_vcl_fini() is called from VGC_Discard(),
183		* handling must either be OK from VCL "return (ok)" or FAIL from VRT_fail().
184		*
185		* replace OK with 0 for _fini callbacks because that handling has meaning only
186		* when returning from VCL subs
187		*/
188
189		void
190	379	VPI_vcl_fini(VRT_CTX)
191		{
192	379	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
193	379	AN(ctx->vpi);
194
195	379	if (ctx->vpi->handling == VCL_RET_FAIL)
196	5	return;
197	374	assert(ctx->vpi->handling == VCL_RET_OK);
198	374	ctx->vpi->handling = 0;
199	379	}
200
201		VCL_VCL
202	105	VPI_vcl_get(VRT_CTX, const char *name)
203		{
204		VCL_VCL vcl;
205
206	105	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
207	105	vcl = vcl_find(name);
208	105	AN(vcl);
209	105	Lck_Lock(&vcl_mtx);
210	105	vcl->nrefs++;
211	105	Lck_Unlock(&vcl_mtx);
212	105	return (vcl);
213		}
214
215		void
216	30	VPI_vcl_rel(VRT_CTX, VCL_VCL vcl)
217		{
218	30	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
219	30	AN(vcl);
220	30	Lck_Lock(&vcl_mtx);
221	30	vcl->nrefs--;
222	30	Lck_Unlock(&vcl_mtx);
223	30	}
224
225		void
226	205	VPI_vcl_select(VRT_CTX, VCL_VCL vcl)
227		{
228	205	struct req *req = ctx->req;
229
230	205	CHECK_OBJ_NOTNULL(vcl, VCL_MAGIC);
231	205	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
232	205	CHECK_OBJ_NOTNULL(req->top, REQTOP_MAGIC);
233
234	205	if ((IS_TOPREQ(req) && req->top->vcl0 != NULL) \|\| req->restarts > 0)
235	140	return; // Illegal, req-FSM will fail this later.
236
237	65	if (! IS_TOPREQ(req))
238	5	assert(req->vcl == req->top->vcl0);
239
240	65	Req_Rollback(ctx);
241
242	65	if (IS_TOPREQ(req)) {
243	60	AN(req->top);
244	60	AZ(req->top->vcl0);
245	60	req->top->vcl0 = req->vcl;
246	60	req->vcl = NULL;
247	60	}
248	65	VCL_Update(&req->vcl, vcl);
249	130	VSLb(ctx->req->vsl, SLT_VCL_use, "%s via %s",
250	65	req->vcl->loaded_name, vcl->loaded_name);
251	85	}
252
253		void v_noreturn_
254	0	VPI_Fail(const char func, const char file, int line,
255		const char *cond)
256		{
257	0	VAS_Fail(func, file, line, cond, VAS_ASSERT);
258		}
259
260		enum vcl_func_fail_e
261	100	VPI_Call_Check(VRT_CTX, const struct VCL_conf *conf,
262		unsigned methods, unsigned n)
263		{
264		struct vbitmap *vbm;
265
266	100	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
267	100	CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
268
269	100	assert(conf == ctx->vcl->conf);
270
271	95	vbm = ctx->called;
272	95	AN(vbm);
273
274	95	if ((methods & ctx->method) == 0)
275	15	return (VSUB_E_METHOD);
276
277	80	if (vbit_test(vbm, n))
278	10	return (VSUB_E_RECURSE);
279
280	70	return (VSUB_E_OK);
281	95	}
282
283		void
284	70	VPI_Call_Begin(VRT_CTX, unsigned n)
285		{
286		struct vbitmap *vbm;
287
288	70	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
289	70	vbm = ctx->called;
290	70	AN(vbm);
291	70	vbit_set(vbm, n);
292	70	}
293
294		void
295	70	VPI_Call_End(VRT_CTX, unsigned n)
296		{
297		struct vbitmap *vbm;
298
299	70	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
300	70	vbm = ctx->called;
301	70	AN(vbm);
302	70	vbit_clr(vbm, n);
303	70	}