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openresty/patches/nginx-1.2.1-dtrace.patch

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diff --git a/auto/install b/auto/install
index c2c0ade..722976c 100644
--- a/auto/install
+++ b/auto/install
@@ -16,6 +16,20 @@ END
fi
+case ".$NGX_STAP_NGX_PATH" in
+ ./*)
+ ;;
+
+ .)
+ NGX_STAP_NGX_PATH=$NGX_PREFIX/sbin/stap-nginx
+ ;;
+
+ *)
+ NGX_STAP_NGX_PATH=$NGX_PREFIX/$NGX_STAP_NGX_PATH
+ ;;
+esac
+
+
case ".$NGX_SBIN_PATH" in
./*)
;;
@@ -53,6 +67,16 @@ case ".$NGX_PID_PATH" in
esac
+case ".$NGX_TAPSET_PATH" in
+ ./* | .)
+ ;;
+
+ *)
+ NGX_TAPSET_PATH=$NGX_PREFIX/$NGX_TAPSET_PATH
+ ;;
+esac
+
+
case ".$NGX_ERROR_LOG_PATH" in
./* | .)
;;
@@ -151,6 +175,21 @@ install: $NGX_OBJS${ngx_dirsep}nginx${ngx_binext} \
|| cp -R $NGX_HTML '\$(DESTDIR)$NGX_PREFIX'
END
+if [ $NGX_DTRACE = YES ]; then
+
+ cat << END >> $NGX_MAKEFILE
+
+ test -d '\$(DESTDIR)`dirname "$NGX_TAPSET_PATH"`' || \
+ mkdir -p '\$(DESTDIR)`dirname "$NGX_TAPSET_PATH"`'
+ cp $NGX_OBJS/nginx.stp '\$(DESTDIR)$NGX_TAPSET_PATH'
+
+ test -d '\$(DESTDIR)`dirname "$NGX_STAP_NGX_PATH"`' || \
+ mkdir -p '\$(DESTDIR)`dirname "$NGX_STAP_NGX_PATH"`'
+ cp $NGX_OBJS/stap-nginx '\$(DESTDIR)$NGX_STAP_NGX_PATH'
+ chmod 0755 '\$(DESTDIR)$NGX_STAP_NGX_PATH'
+END
+
+fi
if test -n "$NGX_ERROR_LOG_PATH"; then
cat << END >> $NGX_MAKEFILE
@@ -162,6 +201,18 @@ END
fi
+if [ $NGX_DTRACE = YES ]; then
+ cat << END >> $NGX_MAKEFILE
+
+$NGX_OBJS${ngx_dirsep}nginx.stp: src/dtrace/nginx.stp
+ sed -e "s|NGX_SBIN_PATH|$NGX_SBIN_PATH|g" src/dtrace/nginx.stp > $NGX_OBJS${ngx_dirsep}nginx.stp
+
+$NGX_OBJS${ngx_dirsep}stap-nginx: src/dtrace/stap-nginx
+ sed -e "s|NGX_STAP_NGX_PATH|$NGX_STAP_NGX_PATH|g" $ngx_long_cont -e "s|NGX_SBIN_DIR|`dirname $NGX_SBIN_PATH`|g" $ngx_long_cont src/dtrace/stap-nginx > $NGX_OBJS${ngx_dirsep}stap-nginx
+END
+fi
+
+
# create Makefile
cat << END >> Makefile
diff --git a/auto/make b/auto/make
index e7f5490..72288e8 100644
--- a/auto/make
+++ b/auto/make
@@ -26,6 +26,9 @@ LINK = $LINK
END
+if [ $NGX_DTRACE = YES ]; then
+ echo DTRACE = $DTRACE >> $NGX_MAKEFILE
+fi
if test -n "$NGX_PERL_CFLAGS"; then
echo NGX_PERL_CFLAGS = $NGX_PERL_CFLAGS >> $NGX_MAKEFILE
@@ -177,6 +180,26 @@ ngx_objs=`echo $ngx_all_objs $ngx_modules_obj \
| sed -e "s/ *\([^ ][^ ]*\)/$ngx_long_regex_cont\1/g" \
-e "s/\//$ngx_regex_dirsep/g"`
+if [ $NGX_DTRACE = YES ]; then
+ ngx_dtrace_obj=$NGX_OBJS${ngx_dirsep}ngx_dtrace_provider.$ngx_objext
+ ngx_dtrace_h=$NGX_OBJS${ngx_dirsep}ngx_dtrace_provider.h
+ ngx_dtrace_d=$NGX_DTRACE_D
+
+cat << END >> $NGX_MAKEFILE
+
+all: $NGX_OBJS${ngx_dirsep}nginx${ngx_binext}
+
+$ngx_dtrace_h: $ngx_dtrace_d
+ \$(DTRACE) -xnolibs -h -o $ngx_dtrace_h -s $ngx_dtrace_d
+
+$ngx_dtrace_obj: $ngx_dtrace_d $ngx_deps$ngx_spacer
+ \$(DTRACE) -xnolibs -G -o $ngx_dtrace_obj -s $ngx_dtrace_d $ngx_objs
+END
+
+ ngx_deps="$ngx_deps$ngx_long_cont$ngx_dtrace_obj$ngx_long_cont$NGX_OBJS${ngx_dirsep}nginx.stp$ngx_long_cont$NGX_OBJS${ngx_dirsep}stap-nginx"
+ ngx_objs="$ngx_objs$ngx_long_cont$ngx_dtrace_obj"
+fi
+
if test -n "$NGX_LD_OPT$CORE_LIBS"; then
ngx_libs=`echo $NGX_LD_OPT $CORE_LIBS \
| sed -e "s/\//$ngx_regex_dirsep/g" -e "s/^/$ngx_long_regex_cont/"`
diff --git a/auto/options b/auto/options
index 393be40..e063dba 100644
--- a/auto/options
+++ b/auto/options
@@ -12,6 +12,8 @@ NGX_CONF_PATH=
NGX_ERROR_LOG_PATH=
NGX_PID_PATH=
NGX_LOCK_PATH=
+NGX_TAPSET_PATH=
+NGX_STAP_NGX_PATH=
NGX_USER=
NGX_GROUP=
@@ -20,6 +22,8 @@ CPP=
NGX_OBJS=objs
NGX_DEBUG=NO
+NGX_DTRACE=NO
+DTRACE=dtrace
NGX_CC_OPT=
NGX_LD_OPT=
CPU=NO
@@ -169,6 +173,8 @@ do
--error-log-path=*) NGX_ERROR_LOG_PATH="$value";;
--pid-path=*) NGX_PID_PATH="$value" ;;
--lock-path=*) NGX_LOCK_PATH="$value" ;;
+ --tapset-path=*) NGX_TAPSET_PATH="$value" ;;
+ --stap-nginx-path=*) NGX_STAP_NGX_PATH="$value" ;;
--user=*) NGX_USER="$value" ;;
--group=*) NGX_GROUP="$value" ;;
@@ -272,7 +278,8 @@ use the \"--without-http_limit_conn_module\" option instead"
--with-ld-opt=*) NGX_LD_OPT="$value" ;;
--with-cpu-opt=*) CPU="$value" ;;
--with-debug) NGX_DEBUG=YES ;;
-
+ --with-dtrace=*) DTRACE="$value" ;;
+ --with-dtrace-probes) NGX_DTRACE=YES ;;
--without-pcre) USE_PCRE=DISABLED ;;
--with-pcre) USE_PCRE=YES ;;
--with-pcre=*) PCRE="$value" ;;
@@ -326,6 +333,8 @@ cat << END
--error-log-path=PATH set error log pathname
--pid-path=PATH set nginx.pid pathname
--lock-path=PATH set nginx.lock pathname
+ --tapset-path=PATH set nginx.stp systemtap tapset pathname
+ --stap-nginx-path=PATH set stap-nginx pathname
--user=USER set non-privileged user for
worker processes
@@ -448,6 +457,8 @@ cat << END
--with-openssl-opt=OPTIONS set additional build options for OpenSSL
--with-debug enable debug logging
+ --with-dtrace-probes enable dtrace USDT probes
+ --with-dtrace=PATH set dtrace utility pathname
END
@@ -477,6 +488,7 @@ NGX_CONF_PATH=${NGX_CONF_PATH:-conf/nginx.conf}
NGX_CONF_PREFIX=`dirname $NGX_CONF_PATH`
NGX_PID_PATH=${NGX_PID_PATH:-logs/nginx.pid}
NGX_LOCK_PATH=${NGX_LOCK_PATH:-logs/nginx.lock}
+NGX_TAPSET_PATH=${NGX_TAPSET_PATH:-tapset/nginx.stp}
if [ ".$NGX_ERROR_LOG_PATH" = ".stderr" ]; then
NGX_ERROR_LOG_PATH=
diff --git a/auto/sources b/auto/sources
index 374ad66..70eed77 100644
--- a/auto/sources
+++ b/auto/sources
@@ -39,6 +39,11 @@ CORE_DEPS="src/core/nginx.h \
src/core/ngx_crypt.h"
+if [ $NGX_DTRACE = YES ]; then
+ CORE_DEPS="$CORE_DEPS objs/ngx_dtrace_provider.h"
+fi
+
+
CORE_SRCS="src/core/nginx.c \
src/core/ngx_log.c \
src/core/ngx_palloc.c \
@@ -291,7 +296,8 @@ HTTP_DEPS="src/http/ngx_http.h \
src/http/ngx_http_script.h \
src/http/ngx_http_upstream.h \
src/http/ngx_http_upstream_round_robin.h \
- src/http/ngx_http_busy_lock.h"
+ src/http/ngx_http_busy_lock.h \
+ src/http/ngx_http_probe.h"
HTTP_SRCS="src/http/ngx_http.c \
src/http/ngx_http_core_module.c \
@@ -524,3 +530,6 @@ NGX_GOOGLE_PERFTOOLS_MODULE=ngx_google_perftools_module
NGX_GOOGLE_PERFTOOLS_SRCS=src/misc/ngx_google_perftools_module.c
NGX_CPP_TEST_SRCS=src/misc/ngx_cpp_test_module.cpp
+
+NGX_DTRACE_D=src/dtrace/nginx_provider.d
+
diff --git a/configure b/configure
index 45ea154..332c011 100755
--- a/configure
+++ b/configure
@@ -20,6 +20,9 @@ if [ $NGX_DEBUG = YES ]; then
have=NGX_DEBUG . auto/have
fi
+if [ $NGX_DTRACE = YES ]; then
+ have=NGX_DTRACE . auto/have
+fi
if test -z "$NGX_PLATFORM"; then
echo "checking for OS"
diff --git a/src/dtrace/nginx.stp b/src/dtrace/nginx.stp
new file mode 100644
index 0000000..a00dc40
--- /dev/null
+++ b/src/dtrace/nginx.stp
@@ -0,0 +1,22 @@
+function ngx_http_req_uri(r)
+{
+ len = @cast(r, "ngx_http_request_s", "NGX_SBIN_PATH")->uri->len
+
+ if (len == 0) {
+ return ""
+ }
+
+ return user_string_n(@cast(r, "ngx_http_request_s", "NGX_SBIN_PATH")->uri->data, len)
+}
+
+function ngx_http_req_args(r)
+{
+ len = @cast(r, "ngx_http_request_s", "NGX_SBIN_PATH")->args->len
+
+ if (len == 0) {
+ return ""
+ }
+
+ return user_string_n(@cast(r, "ngx_http_request_s", "NGX_SBIN_PATH")->args->data, len)
+}
+
diff --git a/src/dtrace/nginx_provider.d b/src/dtrace/nginx_provider.d
new file mode 100644
index 0000000..1f47aef
--- /dev/null
+++ b/src/dtrace/nginx_provider.d
@@ -0,0 +1,24 @@
+typedef struct { int dummy; } ngx_http_request_t;
+typedef struct { int dummy; } ngx_str_t;
+typedef int64_t ngx_int_t;
+
+
+provider nginx {
+ /* probes for subrequests */
+ probe http__subrequest__cycle(ngx_http_request_t *pr, ngx_str_t *uri, ngx_str_t *args);
+ probe http__subrequest__start(ngx_http_request_t *r);
+ probe http__subrequest__finalize_writing(ngx_http_request_t *r);
+ probe http__subrequest__finalize_nonactive(ngx_http_request_t *r);
+ probe http__subrequest__wake__parent(ngx_http_request_t *r);
+ probe http__subrequest__done(ngx_http_request_t *r);
+ probe http__subrequest__post__start(ngx_http_request_t *r, ngx_int_t rc);
+ probe http__subrequest__post__done(ngx_http_request_t *r, ngx_int_t rc);
+};
+
+
+#pragma D attributes Evolving/Evolving/Common provider nginx provider
+#pragma D attributes Private/Private/Unknown provider nginx module
+#pragma D attributes Private/Private/Unknown provider nginx function
+#pragma D attributes Private/Private/Common provider nginx name
+#pragma D attributes Evolving/Evolving/Common provider nginx args
+
diff --git a/src/dtrace/stap-nginx b/src/dtrace/stap-nginx
new file mode 100644
index 0000000..d53ef66
--- /dev/null
+++ b/src/dtrace/stap-nginx
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+export PATH=NGX_SBIN_DIR:$PATH
+exec stap -I "NGX_STAP_NGX_PATH" "$@"
+
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 31832ce..9c5ebf3 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -8,6 +8,7 @@
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
+#include <ngx_http_probe.h>
typedef struct {
@@ -2377,6 +2378,8 @@ ngx_http_subrequest(ngx_http_request_t *r,
r->main->subrequests--;
if (r->main->subrequests == 0) {
+ ngx_http_probe_subrequest_cycle(r, &uri, &args);
+
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"subrequests cycle while processing \"%V\"", uri);
r->main->subrequests = 1;
@@ -2489,6 +2492,8 @@ ngx_http_subrequest(ngx_http_request_t *r,
*psr = sr;
+ ngx_http_probe_subrequest_start(sr);
+
return ngx_http_post_request(sr, NULL);
}
diff --git a/src/http/ngx_http_probe.h b/src/http/ngx_http_probe.h
new file mode 100644
index 0000000..1538560
--- /dev/null
+++ b/src/http/ngx_http_probe.h
@@ -0,0 +1,49 @@
+#ifndef _NGX_HTTP_PROBE_H_INCLUDED_
+#define _NGX_HTTP_PROBE_H_INCLUDED_
+
+#if (NGX_DTRACE)
+
+#include <ngx_dtrace_provider.h>
+
+#define ngx_http_probe_subrequest_cycle(pr, uri, args) \
+ NGINX_HTTP_SUBREQUEST_CYCLE(pr, uri, args)
+
+#define ngx_http_probe_subrequest_start(r) \
+ NGINX_HTTP_SUBREQUEST_START(r)
+
+#define ngx_http_probe_subrequest_finalize_writing(r) \
+ NGINX_HTTP_SUBREQUEST_FINALIZE_WRITING(r)
+
+#define ngx_http_probe_subrequest_finalize_nonactive(r) \
+ NGINX_HTTP_SUBREQUEST_FINALIZE_NONACTIVE(r)
+
+#define ngx_http_probe_subrequest_finalize_nonactive(r) \
+ NGINX_HTTP_SUBREQUEST_FINALIZE_NONACTIVE(r)
+
+#define ngx_http_probe_subrequest_wake_parent(r) \
+ NGINX_HTTP_SUBREQUEST_WAKE_PARENT(r)
+
+#define ngx_http_probe_subrequest_done(r) \
+ NGINX_HTTP_SUBREQUEST_DONE(r)
+
+#define ngx_http_probe_subrequest_post_start(r, rc) \
+ NGINX_HTTP_SUBREQUEST_POST_START(r, rc)
+
+#define ngx_http_probe_subrequest_post_done(r, rc) \
+ NGINX_HTTP_SUBREQUEST_POST_DONE(r, rc)
+
+#else /* !(NGX_DTRACE) */
+
+#define ngx_http_probe_subrequest_cycle(pr, uri, args)
+#define ngx_http_probe_subrequest_start(r)
+#define ngx_http_probe_subrequest_finalize_writing(r)
+#define ngx_http_probe_subrequest_finalize_nonactive(r)
+#define ngx_http_probe_subrequest_wake_parent(r)
+#define ngx_http_probe_subrequest_done(r)
+#define ngx_http_probe_subrequest_post_start(r, rc)
+#define ngx_http_probe_subrequest_post_done(r, rc)
+
+#endif /* NGX_DTRACE */
+
+
+#endif /* _NGX_HTTP_PROBE_H_INCLUDED_ */
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index b187713..383dc2c 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -8,6 +8,7 @@
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
+#include <ngx_http_probe.h>
static void ngx_http_init_request(ngx_event_t *ev);
@@ -1959,7 +1960,11 @@ ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
}
if (r != r->main && r->post_subrequest) {
+ ngx_http_probe_subrequest_post_start(r, rc);
+
rc = r->post_subrequest->handler(r, r->post_subrequest->data, rc);
+
+ ngx_http_probe_subrequest_post_done(r, rc);
}
if (rc == NGX_ERROR
@@ -2009,6 +2014,8 @@ ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
if (r->buffered || r->postponed) {
+ ngx_http_probe_subrequest_finalize_writing(r);
+
if (ngx_http_set_write_handler(r) != NGX_OK) {
ngx_http_terminate_request(r, 0);
}
@@ -2045,10 +2052,14 @@ ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
pr->postponed = pr->postponed->next;
}
+ ngx_http_probe_subrequest_done(r);
+
c->data = pr;
} else {
+ ngx_http_probe_subrequest_finalize_nonactive(r);
+
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
"http finalize non-active request: \"%V?%V\"",
&r->uri, &r->args);
@@ -2060,6 +2071,8 @@ ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
}
}
+ ngx_http_probe_subrequest_wake_parent(r);
+
if (ngx_http_post_request(pr, NULL) != NGX_OK) {
r->main->count++;
ngx_http_terminate_request(r, 0);
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