Welcome! Log In Create A New Profile

Advanced

[nginx] PCRE2 library support.

Maxim Dounin
December 24, 2021 05:14PM
details: https://hg.nginx.org/nginx/rev/0b5f12d5c531
branches:
changeset: 7981:0b5f12d5c531
user: Maxim Dounin <mdounin@mdounin.ru>
date: Sat Dec 25 01:07:15 2021 +0300
description:
PCRE2 library support.

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.

diffstat:

auto/lib/pcre/conf | 107 +++++++++++++--
auto/lib/pcre/make | 152 +++++++++++++++++++---
auto/options | 3 +
auto/summary | 4 +-
src/core/ngx_regex.c | 331 ++++++++++++++++++++++++++++++++++++++++++++++++++-
src/core/ngx_regex.h | 34 ++++-
6 files changed, 576 insertions(+), 55 deletions(-)

diffs (888 lines):

diff -r 8007ea138d6a -r 0b5f12d5c531 auto/lib/pcre/conf
--- a/auto/lib/pcre/conf Sat Dec 25 01:07:14 2021 +0300
+++ b/auto/lib/pcre/conf Sat Dec 25 01:07:15 2021 +0300
@@ -5,29 +5,61 @@

if [ $PCRE != NONE ]; then

- have=NGX_PCRE . auto/have
+ 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"

- if [ "$NGX_PLATFORM" = win32 ]; then
- have=PCRE_STATIC . auto/have
- fi
+ case "$NGX_CC_NAME" in
+
+ msvc)
+ LINK_DEPS="$LINK_DEPS $PCRE/src/pcre2-8.lib"
+ CORE_LIBS="$CORE_LIBS $PCRE/src/pcre2-8.lib"
+ ;;

- CORE_INCS="$CORE_INCS $PCRE"
- CORE_DEPS="$CORE_DEPS $PCRE/pcre.h"
+ *)
+ LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre2-8.a"
+ CORE_LIBS="$CORE_LIBS $PCRE/.libs/libpcre2-8.a"
+ ;;

- case "$NGX_CC_NAME" in
+ esac

- msvc | owc | bcc)
- LINK_DEPS="$LINK_DEPS $PCRE/pcre.lib"
- CORE_LIBS="$CORE_LIBS $PCRE/pcre.lib"
- ;;
+ else
+
+ PCRE_LIBRARY=PCRE
+
+ have=NGX_PCRE . auto/have
+
+ if [ "$NGX_PLATFORM" = win32 ]; then
+ have=PCRE_STATIC . auto/have
+ fi
+
+ CORE_INCS="$CORE_INCS $PCRE"
+ CORE_DEPS="$CORE_DEPS $PCRE/pcre.h"

- *)
- LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre.a"
- CORE_LIBS="$CORE_LIBS $PCRE/.libs/libpcre.a"
- ;;
+ case "$NGX_CC_NAME" in
+
+ msvc | owc | bcc)
+ LINK_DEPS="$LINK_DEPS $PCRE/pcre.lib"
+ CORE_LIBS="$CORE_LIBS $PCRE/pcre.lib"
+ ;;

- esac
+ *)
+ LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre.a"
+ CORE_LIBS="$CORE_LIBS $PCRE/.libs/libpcre.a"
+ ;;

+ 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

- PCRE=NO
+ 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
diff -r 8007ea138d6a -r 0b5f12d5c531 auto/lib/pcre/make
--- a/auto/lib/pcre/make Sat Dec 25 01:07:14 2021 +0300
+++ b/auto/lib/pcre/make Sat Dec 25 01:07:15 2021 +0300
@@ -3,36 +3,138 @@
# 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.

- msvc)
- ngx_makefile=makefile.msvc
- ngx_opt="CPU_OPT=\"$CPU_OPT\" LIBC=$LIBC"
- ngx_pcre="PCRE=\"$PCRE\""
- ;;
+ 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

- owc)
- ngx_makefile=makefile.owc
- ngx_opt="CPU_OPT=\"$CPU_OPT\""
- ngx_pcre=`echo PCRE=\"$PCRE\" | sed -e "s/\//$ngx_regex_dirsep/g"`
- ;;
+ 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

- bcc)
- ngx_makefile=makefile.bcc
- ngx_opt="-DCPU_OPT=\"$CPU_OPT\""
- ngx_pcre=`echo \-DPCRE=\"$PCRE\" | sed -e "s/\//$ngx_regex_dirsep/g"`
- ;;
+$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

- *)
- ngx_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

-esac
+$PCRE/.libs/libpcre2-8.a: $PCRE/Makefile
+ cd $PCRE \\
+ && \$(MAKE) libpcre2-8.la
+
+END
+
+ fi


-if [ -n "$ngx_makefile" ]; then
+else
+
+ # PCRE
+
+ case "$NGX_CC_NAME" in
+
+ msvc)
+ ngx_makefile=makefile.msvc
+ ngx_opt="CPU_OPT=\"$CPU_OPT\" LIBC=$LIBC"
+ ngx_pcre="PCRE=\"$PCRE\""
+ ;;
+
+ owc)
+ ngx_makefile=makefile.owc
+ ngx_opt="CPU_OPT=\"$CPU_OPT\""
+ ngx_pcre=`echo PCRE=\"$PCRE\" | sed -e "s/\//$ngx_regex_dirsep/g"`
+ ;;

- cat << END >> $NGX_MAKEFILE
+ bcc)
+ ngx_makefile=makefile.bcc
+ ngx_opt="-DCPU_OPT=\"$CPU_OPT\""
+ ngx_pcre=`echo \-DPCRE=\"$PCRE\" \
+ | sed -e "s/\//$ngx_regex_dirsep/g"`
+ ;;
+
+ *)
+ ngx_makefile=
+ ;;
+
+ esac
+
+
+ if [ -n "$ngx_makefile" ]; then
+
+ cat << END >> $NGX_MAKEFILE

`echo "$PCRE/pcre.lib: $PCRE/pcre.h $NGX_MAKEFILE" \
| sed -e "s/\//$ngx_regex_dirsep/g"`
@@ -43,9 +145,9 @@ if [ -n "$ngx_makefile" ]; then

END

-else
+ else

- cat << END >> $NGX_MAKEFILE
+ cat << END >> $NGX_MAKEFILE

$PCRE/pcre.h: $PCRE/Makefile

@@ -61,4 +163,6 @@ else

END

+ fi
+
fi
diff -r 8007ea138d6a -r 0b5f12d5c531 auto/options
--- a/auto/options Sat Dec 25 01:07:14 2021 +0300
+++ b/auto/options Sat Dec 25 01:07:15 2021 +0300
@@ -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\" optio
--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
diff -r 8007ea138d6a -r 0b5f12d5c531 auto/summary
--- a/auto/summary Sat Dec 25 01:07:14 2021 +0300
+++ b/auto/summary Sat Dec 25 01:07:15 2021 +0300
@@ -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

diff -r 8007ea138d6a -r 0b5f12d5c531 src/core/ngx_regex.c
--- a/src/core/ngx_regex.c Sat Dec 25 01:07:14 2021 +0300
+++ b/src/core/ngx_regex.c Sat Dec 25 01:07:15 2021 +0300
@@ -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);
@@ -67,15 +72,24 @@ ngx_module_t ngx_regex_module = {
};


-static ngx_pool_t *ngx_regex_pool;
-static ngx_list_t *ngx_regex_studies;
+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
}


+#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) {
@@ -353,11 +654,15 @@ ngx_regex_module_init(ngx_cycle_t *cycle
}
}
#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
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;

diff -r 8007ea138d6a -r 0b5f12d5c531 src/core/ngx_regex.h
--- a/src/core/ngx_regex.h Sat Dec 25 01:07:14 2021 +0300
+++ b/src/core/ngx_regex.h Sat Dec 25 01:07:15 2021 +0300
@@ -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
-
+#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;
@@ -49,10 +61,20 @@ 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()"
+#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);

_______________________________________________
nginx-devel mailing list
nginx-devel@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx-devel
Subject Author Views Posted

[nginx] PCRE2 library support.

Maxim Dounin 519 December 24, 2021 05:14PM



Sorry, you do not have permission to post/reply in this forum.

Online Users

Guests: 76
Record Number of Users: 6 on February 13, 2018
Record Number of Guests: 421 on December 02, 2018
Powered by nginx      Powered by FreeBSD      PHP Powered      Powered by MariaDB      ipv6 ready