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PCRE2 library support.

Browse Source 
The PCRE2 library is now used by default if found, instead of the
original PCRE library.  If needed for some reason, this can be disabled
with the --without-pcre2 configure option.

To make it possible to specify paths to the library and include files
via --with-cc-opt / --with-ld-opt, the library is first tested without
any additional paths and options.  If this fails, the pcre2-config script
is used.

Similarly to the original PCRE library, it is now possible to build PCRE2
from sources with nginx configure, by using the --with-pcre= option.
It automatically detects if PCRE or PCRE2 sources are provided.

Note that compiling PCRE2 10.33 and later requires inttypes.h.  When
compiling on Windows with MSVC, inttypes.h is only available starting
with MSVC 2013.  In older versions some replacement needs to be provided
("echo '#include <stdint.h>' > pcre2-10.xx/src/inttypes.h" is good enough
for MSVC 2010).

The interface on nginx side remains unchanged.
This commit is contained in:
Maxim Dounin 2021-12-25 01:07:15 +03:00
parent cddb22cefe
commit c6fec0b027
6 changed files with 581 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
auto/lib/pcre/conf
View File

@ -5,6 +5,38 @@
if [ $PCRE != NONE ]; then
if [ -f $PCRE/src/pcre2.h.generic ]; then
PCRE_LIBRARY=PCRE2
have=NGX_PCRE . auto/have
have=NGX_PCRE2 . auto/have
if [ "$NGX_PLATFORM" = win32 ]; then
have=PCRE2_STATIC . auto/have
fi
CORE_INCS="$CORE_INCS $PCRE/src/"
CORE_DEPS="$CORE_DEPS $PCRE/src/pcre2.h"
case "$NGX_CC_NAME" in
msvc)
LINK_DEPS="$LINK_DEPS $PCRE/src/pcre2-8.lib"
CORE_LIBS="$CORE_LIBS $PCRE/src/pcre2-8.lib"
;;
*)
LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre2-8.a"
CORE_LIBS="$CORE_LIBS $PCRE/.libs/libpcre2-8.a"
;;
esac
else
PCRE_LIBRARY=PCRE
have=NGX_PCRE . auto/have
if [ "$NGX_PLATFORM" = win32 ]; then
@ -27,7 +59,7 @@ if [ $PCRE != NONE ]; then
;;
esac
fi
if [ $PCRE_JIT = YES ]; then
have=NGX_HAVE_PCRE_JIT . auto/have
@ -37,8 +69,48 @@ if [ $PCRE != NONE ]; then
else
if [ "$NGX_PLATFORM" != win32 ]; then
PCRE=NO
fi
if [ $PCRE = NO -a $PCRE2 != DISABLED ]; then
ngx_feature="PCRE2 library"
ngx_feature_name="NGX_PCRE2"
ngx_feature_run=no
ngx_feature_incs="#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>"
ngx_feature_path=
ngx_feature_libs="-lpcre2-8"
ngx_feature_test="pcre2_code *re;
re = pcre2_compile(NULL, 0, 0, NULL, NULL, NULL);
if (re == NULL) return 1"
. auto/feature
if [ $ngx_found = no ]; then
# pcre2-config
ngx_pcre2_prefix=`pcre2-config --prefix 2>/dev/null`
if [ -n "$ngx_pcre2_prefix" ]; then
ngx_feature="PCRE2 library in $ngx_pcre2_prefix"
ngx_feature_path=`pcre2-config --cflags \
| sed -n -e 's/.*-I *\([^ ][^ ]*\).*/\1/p'`
ngx_feature_libs=`pcre2-config --libs8`
. auto/feature
fi
fi
if [ $ngx_found = yes ]; then
have=NGX_PCRE . auto/have
CORE_INCS="$CORE_INCS $ngx_feature_path"
CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
PCRE=YES
PCRE_LIBRARY=PCRE2
fi
fi
if [ $PCRE = NO ]; then
ngx_feature="PCRE library"
ngx_feature_name="NGX_PCRE"
@ -114,6 +186,7 @@ else
CORE_INCS="$CORE_INCS $ngx_feature_path"
CORE_LIBS="$CORE_LIBS $ngx_feature_libs"
PCRE=YES
PCRE_LIBRARY=PCRE
fi
if [ $PCRE = YES ]; then

114
auto/lib/pcre/make
View File

@ -3,7 +3,108 @@
# Copyright (C) Nginx, Inc.
case "$NGX_CC_NAME" in
if [ $PCRE_LIBRARY = PCRE2 ]; then
# PCRE2
if [ $NGX_CC_NAME = msvc ]; then
# With PCRE2, it is not possible to compile all sources.
# Since list of source files changes between versions, we
# test files which might not be present.
ngx_pcre_srcs="pcre2_auto_possess.c \
pcre2_chartables.c \
pcre2_compile.c \
pcre2_config.c \
pcre2_context.c \
pcre2_dfa_match.c \
pcre2_error.c \
pcre2_jit_compile.c \
pcre2_maketables.c \
pcre2_match.c \
pcre2_match_data.c \
pcre2_newline.c \
pcre2_ord2utf.c \
pcre2_pattern_info.c \
pcre2_string_utils.c \
pcre2_study.c \
pcre2_substitute.c \
pcre2_substring.c \
pcre2_tables.c \
pcre2_ucd.c \
pcre2_valid_utf.c \
pcre2_xclass.c"
ngx_pcre_test="pcre2_convert.c \
pcre2_extuni.c \
pcre2_find_bracket.c \
pcre2_script_run.c \
pcre2_serialize.c"
for ngx_src in $ngx_pcre_test
do
if [ -f $PCRE/src/$ngx_src ]; then
ngx_pcre_srcs="$ngx_pcre_srcs $ngx_src"
fi
done
ngx_pcre_objs=`echo $ngx_pcre_srcs \
| sed -e "s#\([^ ]*\.\)c#\1$ngx_objext#g"`
ngx_pcre_srcs=`echo $ngx_pcre_srcs \
| sed -e "s/ *\([^ ][^ ]*\)/$ngx_regex_cont\1/g"`
ngx_pcre_objs=`echo $ngx_pcre_objs \
| sed -e "s/ *\([^ ][^ ]*\)/$ngx_regex_cont\1/g"`
cat << END >> $NGX_MAKEFILE
PCRE_CFLAGS = -O2 -Ob1 -Oi -Gs $LIBC $CPU_OPT
PCRE_FLAGS = -DHAVE_CONFIG_H -DPCRE2_STATIC -DPCRE2_CODE_UNIT_WIDTH=8 \\
-DHAVE_MEMMOVE
PCRE_SRCS = $ngx_pcre_srcs
PCRE_OBJS = $ngx_pcre_objs
$PCRE/src/pcre2.h:
cd $PCRE/src \\
&& copy /y config.h.generic config.h \\
&& copy /y pcre2.h.generic pcre2.h \\
&& copy /y pcre2_chartables.c.dist pcre2_chartables.c
$PCRE/src/pcre2-8.lib: $PCRE/src/pcre2.h $NGX_MAKEFILE
cd $PCRE/src \\
&& cl -nologo -c \$(PCRE_CFLAGS) -I . \$(PCRE_FLAGS) \$(PCRE_SRCS) \\
&& link -lib -out:pcre2-8.lib -verbose:lib \$(PCRE_OBJS)
END
else
cat << END >> $NGX_MAKEFILE
$PCRE/src/pcre2.h: $PCRE/Makefile
$PCRE/Makefile: $NGX_MAKEFILE
cd $PCRE \\
&& if [ -f Makefile ]; then \$(MAKE) distclean; fi \\
&& CC="\$(CC)" CFLAGS="$PCRE_OPT" \\
./configure --disable-shared $PCRE_CONF_OPT
$PCRE/.libs/libpcre2-8.a: $PCRE/Makefile
cd $PCRE \\
&& \$(MAKE) libpcre2-8.la
END
fi
else
# PCRE
case "$NGX_CC_NAME" in
msvc)
ngx_makefile=makefile.msvc
@ -20,17 +121,18 @@ case "$NGX_CC_NAME" in
bcc)
ngx_makefile=makefile.bcc
ngx_opt="-DCPU_OPT=\"$CPU_OPT\""
ngx_pcre=`echo \-DPCRE=\"$PCRE\" | sed -e "s/\//$ngx_regex_dirsep/g"`
ngx_pcre=`echo \-DPCRE=\"$PCRE\" \
| sed -e "s/\//$ngx_regex_dirsep/g"`
;;
*)
ngx_makefile=
;;
esac
esac
if [ -n "$ngx_makefile" ]; then
if [ -n "$ngx_makefile" ]; then
cat << END >> $NGX_MAKEFILE
@ -43,7 +145,7 @@ if [ -n "$ngx_makefile" ]; then
END
else
else
cat << END >> $NGX_MAKEFILE
@ -61,4 +163,6 @@ $PCRE/.libs/libpcre.a: $PCRE/Makefile
END
fi
fi

3
auto/options
View File

@ -146,6 +146,7 @@ PCRE=NONE
PCRE_OPT=
PCRE_CONF_OPT=
PCRE_JIT=NO
PCRE2=YES
USE_OPENSSL=NO
OPENSSL=NONE
@ -357,6 +358,7 @@ use the \"--with-mail_ssl_module\" option instead"
--with-pcre=*) PCRE="$value" ;;
--with-pcre-opt=*) PCRE_OPT="$value" ;;
--with-pcre-jit) PCRE_JIT=YES ;;
--without-pcre2) PCRE2=DISABLED ;;
--with-openssl=*) OPENSSL="$value" ;;
--with-openssl-opt=*) OPENSSL_OPT="$value" ;;
@ -573,6 +575,7 @@ cat << END
--with-pcre=DIR set path to PCRE library sources
--with-pcre-opt=OPTIONS set additional build options for PCRE
--with-pcre-jit build PCRE with JIT compilation support
--without-pcre2 do not use PCRE2 library
--with-zlib=DIR set path to zlib library sources
--with-zlib-opt=OPTIONS set additional build options for zlib

4
auto/summary
View File

@ -16,9 +16,9 @@ if [ $USE_PCRE = DISABLED ]; then
else
case $PCRE in
YES) echo " + using system PCRE library" ;;
YES) echo " + using system $PCRE_LIBRARY library" ;;
NONE) echo " + PCRE library is not used" ;;
*) echo " + using PCRE library: $PCRE" ;;
*) echo " + using $PCRE_LIBRARY library: $PCRE" ;;
esac
fi

327
src/core/ngx_regex.c
View File

@ -18,8 +18,13 @@ typedef struct {
static ngx_inline void ngx_regex_malloc_init(ngx_pool_t *pool);
static ngx_inline void ngx_regex_malloc_done(void);
#if (NGX_PCRE2)
static void * ngx_libc_cdecl ngx_regex_malloc(size_t size, void *data);
static void ngx_libc_cdecl ngx_regex_free(void *p, void *data);
#else
static void * ngx_libc_cdecl ngx_regex_malloc(size_t size);
static void ngx_libc_cdecl ngx_regex_free(void *p);
#endif
static void ngx_regex_cleanup(void *data);
static ngx_int_t ngx_regex_module_init(ngx_cycle_t *cycle);
@ -69,13 +74,22 @@ ngx_module_t ngx_regex_module = {
static ngx_pool_t *ngx_regex_pool;
static ngx_list_t *ngx_regex_studies;
static ngx_uint_t ngx_regex_direct_alloc;
#if (NGX_PCRE2)
static pcre2_compile_context *ngx_regex_compile_context;
static pcre2_match_data *ngx_regex_match_data;
static ngx_uint_t ngx_regex_match_data_size;
#endif
void
ngx_regex_init(void)
{
#if !(NGX_PCRE2)
pcre_malloc = ngx_regex_malloc;
pcre_free = ngx_regex_free;
#endif
}
@ -83,6 +97,7 @@ static ngx_inline void
ngx_regex_malloc_init(ngx_pool_t *pool)
{
ngx_regex_pool = pool;
ngx_regex_direct_alloc = (pool == NULL) ? 1 : 0;
}
@ -90,9 +105,146 @@ static ngx_inline void
ngx_regex_malloc_done(void)
{
ngx_regex_pool = NULL;
ngx_regex_direct_alloc = 0;
}
#if (NGX_PCRE2)
ngx_int_t
ngx_regex_compile(ngx_regex_compile_t *rc)
{
int n, errcode;
char *p;
u_char errstr[128];
size_t erroff;
pcre2_code *re;
ngx_regex_elt_t *elt;
pcre2_general_context *gctx;
pcre2_compile_context *cctx;
if (ngx_regex_compile_context == NULL) {
/*
* Allocate a compile context if not yet allocated. This uses
* direct allocations from heap, so the result can be cached
* even at runtime.
*/
ngx_regex_malloc_init(NULL);
gctx = pcre2_general_context_create(ngx_regex_malloc, ngx_regex_free,
NULL);
if (gctx == NULL) {
ngx_regex_malloc_done();
goto nomem;
}
cctx = pcre2_compile_context_create(gctx);
if (cctx == NULL) {
pcre2_general_context_free(gctx);
ngx_regex_malloc_done();
goto nomem;
}
ngx_regex_compile_context = cctx;
pcre2_general_context_free(gctx);
ngx_regex_malloc_done();
}
ngx_regex_malloc_init(rc->pool);
re = pcre2_compile(rc->pattern.data, rc->pattern.len,
(uint32_t) rc->options, &errcode, &erroff,
ngx_regex_compile_context);
/* ensure that there is no current pool */
ngx_regex_malloc_done();
if (re == NULL) {
pcre2_get_error_message(errcode, errstr, 128);
if ((size_t) erroff == rc->pattern.len) {
rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
"pcre2_compile() failed: %s in \"%V\"",
errstr, &rc->pattern)
- rc->err.data;
} else {
rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
"pcre2_compile() failed: %s in \"%V\" at \"%s\"",
errstr, &rc->pattern, rc->pattern.data + erroff)
- rc->err.data;
}
return NGX_ERROR;
}
rc->regex = re;
/* do not study at runtime */
if (ngx_regex_studies != NULL) {
elt = ngx_list_push(ngx_regex_studies);
if (elt == NULL) {
goto nomem;
}
elt->regex = rc->regex;
elt->name = rc->pattern.data;
}
n = pcre2_pattern_info(re, PCRE2_INFO_CAPTURECOUNT, &rc->captures);
if (n < 0) {
p = "pcre2_pattern_info(\"%V\", PCRE2_INFO_CAPTURECOUNT) failed: %d";
goto failed;
}
if (rc->captures == 0) {
return NGX_OK;
}
n = pcre2_pattern_info(re, PCRE2_INFO_NAMECOUNT, &rc->named_captures);
if (n < 0) {
p = "pcre2_pattern_info(\"%V\", PCRE2_INFO_NAMECOUNT) failed: %d";
goto failed;
}
if (rc->named_captures == 0) {
return NGX_OK;
}
n = pcre2_pattern_info(re, PCRE2_INFO_NAMEENTRYSIZE, &rc->name_size);
if (n < 0) {
p = "pcre2_pattern_info(\"%V\", PCRE2_INFO_NAMEENTRYSIZE) failed: %d";
goto failed;
}
n = pcre2_pattern_info(re, PCRE2_INFO_NAMETABLE, &rc->names);
if (n < 0) {
p = "pcre2_pattern_info(\"%V\", PCRE2_INFO_NAMETABLE) failed: %d";
goto failed;
}
return NGX_OK;
failed:
rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n)
- rc->err.data;
return NGX_ERROR;
nomem:
rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
"regex \"%V\" compilation failed: no memory",
&rc->pattern)
- rc->err.data;
return NGX_ERROR;
}
#else
ngx_int_t
ngx_regex_compile(ngx_regex_compile_t *rc)
{
@ -195,6 +347,74 @@ nomem:
return NGX_ERROR;
}
#endif
#if (NGX_PCRE2)
ngx_int_t
ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures, ngx_uint_t size)
{
size_t *ov;
ngx_int_t rc;
ngx_uint_t n, i;
/*
* The pcre2_match() function might allocate memory for backtracking
* frames, typical allocations are from 40k and above. So the allocator
* is configured to do direct allocations from heap during matching.
*/
ngx_regex_malloc_init(NULL);
if (ngx_regex_match_data == NULL
|| size > ngx_regex_match_data_size)
{
/*
* Allocate a match data if not yet allocated or smaller than
* needed.
*/
if (ngx_regex_match_data) {
pcre2_match_data_free(ngx_regex_match_data);
}
ngx_regex_match_data_size = size;
ngx_regex_match_data = pcre2_match_data_create(size / 3, NULL);
if (ngx_regex_match_data == NULL) {
rc = PCRE2_ERROR_NOMEMORY;
goto failed;
}
}
rc = pcre2_match(re, s->data, s->len, 0, 0, ngx_regex_match_data, NULL);
if (rc < 0) {
goto failed;
}
n = pcre2_get_ovector_count(ngx_regex_match_data);
ov = pcre2_get_ovector_pointer(ngx_regex_match_data);
if (n > size / 3) {
n = size / 3;
}
for (i = 0; i < n; i++) {
captures[i * 2] = ov[i * 2];
captures[i * 2 + 1] = ov[i * 2 + 1];
}
failed:
ngx_regex_malloc_done();
return rc;
}
#endif
ngx_int_t
ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
@ -229,6 +449,35 @@ ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
}
#if (NGX_PCRE2)
static void * ngx_libc_cdecl
ngx_regex_malloc(size_t size, void *data)
{
if (ngx_regex_pool) {
return ngx_palloc(ngx_regex_pool, size);
}
if (ngx_regex_direct_alloc) {
return ngx_alloc(size, ngx_cycle->log);
}
return NULL;
}
static void ngx_libc_cdecl
ngx_regex_free(void *p, void *data)
{
if (ngx_regex_direct_alloc) {
ngx_free(p);
}
return;
}
#else
static void * ngx_libc_cdecl
ngx_regex_malloc(size_t size)
{
@ -246,11 +495,13 @@ ngx_regex_free(void *p)
return;
}
#endif
static void
ngx_regex_cleanup(void *data)
{
#if (NGX_HAVE_PCRE_JIT)
#if (NGX_PCRE2 || NGX_HAVE_PCRE_JIT)
ngx_regex_conf_t *rcf = data;
ngx_uint_t i;
@ -275,12 +526,17 @@ ngx_regex_cleanup(void *data)
/*
* The PCRE JIT compiler uses mmap for its executable codes, so we
* have to explicitly call the pcre_free_study() function to free
* this memory.
* this memory. In PCRE2, we call the pcre2_code_free() function
* for the same reason.
*/
#if (NGX_PCRE2)
pcre2_code_free(elts[i].regex);
#else
if (elts[i].regex->extra != NULL) {
pcre_free_study(elts[i].regex->extra);
}
#endif
}
#endif
@ -290,6 +546,26 @@ ngx_regex_cleanup(void *data)
*/
ngx_regex_studies = NULL;
#if (NGX_PCRE2)
/*
* Free compile context and match data. If needed at runtime by
* the new cycle, these will be re-allocated.
*/
if (ngx_regex_compile_context) {
pcre2_compile_context_free(ngx_regex_compile_context);
ngx_regex_compile_context = NULL;
}
if (ngx_regex_match_data) {
pcre2_match_data_free(ngx_regex_match_data);
ngx_regex_match_data = NULL;
ngx_regex_match_data_size = 0;
}
#endif
}
@ -297,7 +573,9 @@ static ngx_int_t
ngx_regex_module_init(ngx_cycle_t *cycle)
{
int opt;
#if !(NGX_PCRE2)
const char *errstr;
#endif
ngx_uint_t i;
ngx_list_part_t *part;
ngx_regex_elt_t *elts;
@ -307,10 +585,16 @@ ngx_regex_module_init(ngx_cycle_t *cycle)
rcf = (ngx_regex_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_regex_module);
#if (NGX_HAVE_PCRE_JIT)
#if (NGX_PCRE2 || NGX_HAVE_PCRE_JIT)
if (rcf->pcre_jit) {
#if (NGX_PCRE2)
opt = 1;
#else
opt = PCRE_STUDY_JIT_COMPILE;
#endif
}
#endif
ngx_regex_malloc_init(cycle->pool);
@ -330,6 +614,23 @@ ngx_regex_module_init(ngx_cycle_t *cycle)
i = 0;
}
#if (NGX_PCRE2)
if (opt) {
int n;
n = pcre2_jit_compile(elts[i].regex, PCRE2_JIT_COMPLETE);
if (n != 0) {
ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
"pcre2_jit_compile() failed: %d in \"%s\", "
"ignored",
n, elts[i].name);
}
}
#else
elts[i].regex->extra = pcre_study(elts[i].regex->code, opt, &errstr);
if (errstr != NULL) {
@ -352,12 +653,16 @@ ngx_regex_module_init(ngx_cycle_t *cycle)
elts[i].name);
}
}
#endif
#endif
}
ngx_regex_malloc_done();
ngx_regex_studies = NULL;
#if (NGX_PCRE2)
ngx_regex_compile_context = NULL;
#endif
return NGX_OK;
}
@ -415,7 +720,21 @@ ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data)
return NGX_CONF_OK;
}
#if (NGX_HAVE_PCRE_JIT)
#if (NGX_PCRE2)
{
int r;
uint32_t jit;
jit = 0;
r = pcre2_config(PCRE2_CONFIG_JIT, &jit);
if (r != 0 || jit != 1) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"PCRE2 library does not support JIT");
*fp = 0;
}
}
#elif (NGX_HAVE_PCRE_JIT)
{
int jit, r;

28
src/core/ngx_regex.h
View File

@ -12,19 +12,31 @@
#include <ngx_config.h>
#include <ngx_core.h>
#if (NGX_PCRE2)
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#define NGX_REGEX_NO_MATCHED PCRE2_ERROR_NOMATCH /* -1 */
#define NGX_REGEX_CASELESS PCRE2_CASELESS
typedef pcre2_code ngx_regex_t;
#else
#include <pcre.h>
#define NGX_REGEX_NO_MATCHED PCRE_ERROR_NOMATCH /* -1 */
#define NGX_REGEX_CASELESS PCRE_CASELESS
typedef struct {
pcre *code;
pcre_extra *extra;
} ngx_regex_t;
#endif
typedef struct {
ngx_str_t pattern;
@ -49,11 +61,21 @@ typedef struct {
void ngx_regex_init(void);
ngx_int_t ngx_regex_compile(ngx_regex_compile_t *rc);
#if (NGX_PCRE2)
ngx_int_t ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures,
ngx_uint_t size);
#define ngx_regex_exec_n "pcre2_match()"
#else
#define ngx_regex_exec(re, s, captures, size) \
pcre_exec(re->code, re->extra, (const char *) (s)->data, (s)->len, 0, 0, \
captures, size)
#define ngx_regex_exec_n "pcre_exec()"
#endif
ngx_int_t ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log);