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905 lines
27 KiB
C
905 lines
27 KiB
C
diff --git a/README b/README
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index 2f68e14..4f2c4a7 100644
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--- a/README
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+++ b/README
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@@ -1,3 +1,40 @@
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+This is an Nginx fork that adds dtrace USDT probes.
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-Documentation is available at http://nginx.org
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+This is still under development and not usable yet.
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+
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+Installation:
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+
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+ ./configure --with-dtrace-probes \
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+ --with-dtrace=/usr/sbin/dtrace \
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+ ...
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+ make
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+ make install
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+
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+Usage on Linux (with systemtap):
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+
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+ # make the stap-nginx script visiable in your PATH
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+ export PATH=/usr/local/nginx/sbin:$PATH
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+
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+ # list all the static probes available in your nginx
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+ stap-nginx -L 'process("nginx").mark("*")'
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+
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+ # run the test.stp file
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+ stap-nginx test.stp
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+
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+Sample test.stp file:
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+
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+ probe begin
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+ {
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+ print("Tracing. Hit CTRL-C to stop.\n")
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+ }
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+
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+ probe process("nginx").mark("http-subrequest-start")
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+ {
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+ printf("uri: %s?%s\n", ngx_http_req_uri($arg1),
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+ ngx_http_req_args($arg1))
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+ }
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+
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+For now, only tested on Solaris 11 Express and Fedora Linux 17.
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+
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+The original Nginx documentation is available at http://nginx.org
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diff --git a/auto/install b/auto/install
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index c2c0ade..fe2a2dd 100644
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--- a/auto/install
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+++ b/auto/install
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@@ -16,6 +16,20 @@ END
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fi
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|
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+case ".$NGX_STAP_NGX_PATH" in
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+ ./*)
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+ ;;
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+
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+ .)
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+ NGX_STAP_NGX_PATH=$NGX_PREFIX/sbin/stap-nginx
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+ ;;
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+
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+ *)
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+ NGX_STAP_NGX_PATH=$NGX_PREFIX/$NGX_STAP_NGX_PATH
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+ ;;
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+esac
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+
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+
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case ".$NGX_SBIN_PATH" in
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./*)
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;;
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@@ -53,6 +67,16 @@ case ".$NGX_PID_PATH" in
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esac
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|
|
|
|
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+case ".$NGX_TAPSET_PREFIX" in
|
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+ ./* | .)
|
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+ ;;
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|
+
|
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+ *)
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+ NGX_TAPSET_PREFIX=$NGX_PREFIX/$NGX_TAPSET_PREFIX
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+ ;;
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+esac
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+
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+
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case ".$NGX_ERROR_LOG_PATH" in
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./* | .)
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;;
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@@ -151,6 +175,36 @@ install: $NGX_OBJS${ngx_dirsep}nginx${ngx_binext} \
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|| cp -R $NGX_HTML '\$(DESTDIR)$NGX_PREFIX'
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END
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+if [ $NGX_DTRACE = YES -a $DTRACE_FROM_SYSTEMTAP = YES ]; then
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+
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+ ngx_tapset_srcs="$NGX_TAPSET_SRCS"
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+
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+ cat << END >> $NGX_MAKEFILE
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+ test -d '\$(DESTDIR)$NGX_TAPSET_PREFIX' || \
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+ mkdir -p '\$(DESTDIR)$NGX_TAPSET_PREFIX'
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+END
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+
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+ for ngx_tapset_src in $ngx_tapset_srcs
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+ do
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+ ngx_tapset_file=`basename $ngx_tapset_src`
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+
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+ cat << END >> $NGX_MAKEFILE
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+
|
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+ sed -e "s|NGX_SBIN_PATH|$NGX_SBIN_PATH|g" $ngx_long_cont \
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+ $ngx_tapset_src > '\$(DESTDIR)$NGX_TAPSET_PREFIX/$ngx_tapset_file'
|
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+END
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+
|
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+ done
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+
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+ cat << END >> $NGX_MAKEFILE
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+
|
|
+ test -d '\$(DESTDIR)`dirname "$NGX_STAP_NGX_PATH"`' || \
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+ mkdir -p '\$(DESTDIR)`dirname "$NGX_STAP_NGX_PATH"`'
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+ cp $NGX_OBJS/stap-nginx '\$(DESTDIR)$NGX_STAP_NGX_PATH'
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+ chmod 0755 '\$(DESTDIR)$NGX_STAP_NGX_PATH'
|
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+END
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+
|
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+fi
|
|
|
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if test -n "$NGX_ERROR_LOG_PATH"; then
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cat << END >> $NGX_MAKEFILE
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@@ -162,6 +216,18 @@ END
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fi
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|
|
|
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+if [ $NGX_DTRACE = YES ]; then
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+ cat << END >> $NGX_MAKEFILE
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+
|
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+$NGX_OBJS${ngx_dirsep}stap-nginx: src/dtrace/stap-nginx
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+ sed -e "s|NGX_TAPSET_PREFIX|$NGX_TAPSET_PREFIX|g" $ngx_long_cont \
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+ -e "s|NGX_SBIN_DIR|`dirname $NGX_SBIN_PATH`|g" $ngx_long_cont \
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+ -e "s|NGX_SBIN_PATH|$NGX_SBIN_PATH|g" $ngx_long_cont \
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+ src/dtrace/stap-nginx > $NGX_OBJS${ngx_dirsep}stap-nginx
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+END
|
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+fi
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+
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+
|
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# create Makefile
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|
|
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cat << END >> Makefile
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diff --git a/auto/make b/auto/make
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index e7f5490..e1cb37e 100644
|
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--- a/auto/make
|
|
+++ b/auto/make
|
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@@ -26,6 +26,9 @@ LINK = $LINK
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END
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+if [ $NGX_DTRACE = YES ]; then
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+ echo DTRACE = $DTRACE >> $NGX_MAKEFILE
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+fi
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if test -n "$NGX_PERL_CFLAGS"; then
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echo NGX_PERL_CFLAGS = $NGX_PERL_CFLAGS >> $NGX_MAKEFILE
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@@ -177,6 +180,44 @@ ngx_objs=`echo $ngx_all_objs $ngx_modules_obj \
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| sed -e "s/ *\([^ ][^ ]*\)/$ngx_long_regex_cont\1/g" \
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-e "s/\//$ngx_regex_dirsep/g"`
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+if [ $NGX_DTRACE = YES ]; then
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+
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+ ngx_dtrace_obj=$NGX_OBJS${ngx_dirsep}ngx_dtrace_provider.$ngx_objext
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+
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+ ngx_dtrace_h=$NGX_OBJS${ngx_dirsep}ngx_dtrace_provider.h
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+
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+ ngx_dtrace_d=$NGX_OBJS${ngx_dirsep}dtrace_providers.d
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+
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+ ngx_dtrace_providers=`echo $NGX_DTRACE_PROVIDERS \
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+ | sed -e "s/ *\([^ ][^ ]*\)/$ngx_long_regex_cont\1/g" \
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+ -e "s/\//$ngx_regex_dirsep/g"`
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+
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+ cat << END >> $NGX_MAKEFILE
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+
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+all: $NGX_OBJS${ngx_dirsep}nginx${ngx_binext}
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+
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+$ngx_dtrace_d: $ngx_dtrace_providers
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+ cat $ngx_dtrace_providers > $ngx_dtrace_d
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+
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+$ngx_dtrace_h: $ngx_dtrace_d
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+ \$(DTRACE) -xnolibs -h -o $ngx_dtrace_h -s $ngx_dtrace_d
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+END
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+
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+ if [ $DTRACE_PROBE_OBJ = YES ]; then
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+ cat << END >> $NGX_MAKEFILE
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+$ngx_dtrace_obj: $ngx_dtrace_d $ngx_deps$ngx_spacer
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+ \$(DTRACE) -xnolibs -G -o $ngx_dtrace_obj -s $ngx_dtrace_d $ngx_objs
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+END
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+
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+ ngx_deps="$ngx_deps$ngx_long_cont$ngx_dtrace_obj"
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+ ngx_objs="$ngx_objs$ngx_long_cont$ngx_dtrace_obj"
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+
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+ if [ "$DTRACE_FROM_SYSTEMTAP" = YES ]; then
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+ ngx_deps="$ngx_deps$ngx_long_cont$NGX_OBJS${ngx_dirsep}stap-nginx"
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+ fi
|
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+ fi
|
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+fi
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+
|
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if test -n "$NGX_LD_OPT$CORE_LIBS"; then
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ngx_libs=`echo $NGX_LD_OPT $CORE_LIBS \
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| sed -e "s/\//$ngx_regex_dirsep/g" -e "s/^/$ngx_long_regex_cont/"`
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diff --git a/auto/options b/auto/options
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index 393be40..9b7494f 100644
|
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--- a/auto/options
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+++ b/auto/options
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@@ -12,6 +12,8 @@ NGX_CONF_PATH=
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NGX_ERROR_LOG_PATH=
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NGX_PID_PATH=
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NGX_LOCK_PATH=
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+NGX_TAPSET_PREFIX=
|
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+NGX_STAP_NGX_PATH=
|
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NGX_USER=
|
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NGX_GROUP=
|
|
|
|
@@ -20,6 +22,12 @@ CPP=
|
|
NGX_OBJS=objs
|
|
|
|
NGX_DEBUG=NO
|
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+NGX_DTRACE=NO
|
|
+DTRACE=dtrace
|
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+
|
|
+DTRACE_PROBE_OBJ=YES
|
|
+DTRACE_FROM_SYSTEMTAP=NO
|
|
+
|
|
NGX_CC_OPT=
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|
NGX_LD_OPT=
|
|
CPU=NO
|
|
@@ -169,6 +177,8 @@ do
|
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--error-log-path=*) NGX_ERROR_LOG_PATH="$value";;
|
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--pid-path=*) NGX_PID_PATH="$value" ;;
|
|
--lock-path=*) NGX_LOCK_PATH="$value" ;;
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+ --tapset-prefix=*) NGX_TAPSET_PREFIX="$value" ;;
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|
+ --stap-nginx-path=*) NGX_STAP_NGX_PATH="$value" ;;
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--user=*) NGX_USER="$value" ;;
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--group=*) NGX_GROUP="$value" ;;
|
|
|
|
@@ -272,7 +282,8 @@ 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 ;;
|
|
-
|
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+ --with-dtrace=*) DTRACE="$value" ;;
|
|
+ --with-dtrace-probes) NGX_DTRACE=YES ;;
|
|
--without-pcre) USE_PCRE=DISABLED ;;
|
|
--with-pcre) USE_PCRE=YES ;;
|
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--with-pcre=*) PCRE="$value" ;;
|
|
@@ -326,6 +337,8 @@ cat << END
|
|
--error-log-path=PATH set error log pathname
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|
--pid-path=PATH set nginx.pid pathname
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--lock-path=PATH set nginx.lock pathname
|
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+ --tapset-prefix=PATH set systemtap tapset directory prefix
|
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+ --stap-nginx-path=PATH set stap-nginx pathname
|
|
|
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--user=USER set non-privileged user for
|
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worker processes
|
|
@@ -448,6 +461,8 @@ 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 +492,7 @@ NGX_CONF_PATH=${NGX_CONF_PATH:-conf/nginx.conf}
|
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NGX_CONF_PREFIX=`dirname $NGX_CONF_PATH`
|
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NGX_PID_PATH=${NGX_PID_PATH:-logs/nginx.pid}
|
|
NGX_LOCK_PATH=${NGX_LOCK_PATH:-logs/nginx.lock}
|
|
+NGX_TAPSET_PREFIX=${NGX_TAPSET_PREFIX:-tapset}
|
|
|
|
if [ ".$NGX_ERROR_LOG_PATH" = ".stderr" ]; then
|
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NGX_ERROR_LOG_PATH=
|
|
diff --git a/auto/os/darwin b/auto/os/darwin
|
|
index 590e036..af33cf3 100644
|
|
--- a/auto/os/darwin
|
|
+++ b/auto/os/darwin
|
|
@@ -114,3 +114,6 @@ ngx_feature_libs=
|
|
ngx_feature_test="int32_t lock, n;
|
|
n = OSAtomicCompareAndSwap32Barrier(0, 1, lock)"
|
|
. auto/feature
|
|
+
|
|
+DTRACE_PROBE_OBJ=NO
|
|
+
|
|
diff --git a/auto/os/freebsd b/auto/os/freebsd
|
|
index 6aa823f..ee15166 100644
|
|
--- a/auto/os/freebsd
|
|
+++ b/auto/os/freebsd
|
|
@@ -142,3 +142,8 @@ if [ $version -ge 701000 ]; then
|
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echo " + cpuset_setaffinity() found"
|
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have=NGX_HAVE_CPUSET_SETAFFINITY . auto/have
|
|
fi
|
|
+
|
|
+if [ $NGX_DTRACE = YES ]; then
|
|
+ NGX_LD_OPT="$NGX_LD_OPT -lelf"
|
|
+fi
|
|
+
|
|
diff --git a/auto/os/linux b/auto/os/linux
|
|
index c506d3d..cbbfbf1 100644
|
|
--- a/auto/os/linux
|
|
+++ b/auto/os/linux
|
|
@@ -151,3 +151,5 @@ ngx_include="sys/vfs.h"; . auto/include
|
|
|
|
|
|
CC_AUX_FLAGS="$cc_aux_flags -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64"
|
|
+
|
|
+DTRACE_FROM_SYSTEMTAP=YES
|
|
diff --git a/auto/sources b/auto/sources
|
|
index 374ad66..72bb1b0 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 +530,8 @@ 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_PROVIDERS=src/dtrace/nginx_provider.d
|
|
+
|
|
+NGX_TAPSET_SRCS=src/dtrace/nginx.stp
|
|
+
|
|
diff --git a/auto/summary b/auto/summary
|
|
index dcebec9..3cb269e 100644
|
|
--- a/auto/summary
|
|
+++ b/auto/summary
|
|
@@ -92,6 +92,19 @@ else
|
|
echo " nginx logs errors to stderr"
|
|
fi
|
|
|
|
+if [ $NGX_DTRACE = YES ]; then
|
|
+ cat << END
|
|
+ nginx dtrace static probes enabled
|
|
+END
|
|
+
|
|
+ if [ $DTRACE_FROM_SYSTEMTAP = YES ]; then
|
|
+ cat << END
|
|
+ nginx systemtap tapset prefix: "$NGX_TAPSET_PREFIX"
|
|
+ nginx systemtap wrapper script: "$NGX_STAP_NGX_PATH"
|
|
+END
|
|
+ fi
|
|
+fi
|
|
+
|
|
cat << END
|
|
nginx http access log file: "$NGX_HTTP_LOG_PATH"
|
|
nginx http client request body temporary files: "$NGX_HTTP_CLIENT_TEMP_PATH"
|
|
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..fccea2b
|
|
--- /dev/null
|
|
+++ b/src/dtrace/nginx.stp
|
|
@@ -0,0 +1,152 @@
|
|
+/* tapset for nginx */
|
|
+
|
|
+/* retrieve the request uri string from the ngx_http_request_t pointer */
|
|
+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)
|
|
+}
|
|
+
|
|
+
|
|
+/* retrieve the request query string from the ngx_http_request_t pointer */
|
|
+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)
|
|
+}
|
|
+
|
|
+
|
|
+/* retrieve the first command name (or directive name) from
|
|
+ * the ngx_module_t pointer */
|
|
+function ngx_http_module_cmd(m)
|
|
+{
|
|
+ cmds = @cast(m, "ngx_module_t", "NGX_SBIN_PATH")->commands
|
|
+ if (cmds == 0) {
|
|
+ return ""
|
|
+ }
|
|
+
|
|
+ len = @cast(cmds, "ngx_command_t", "NGX_SBIN_PATH")->name->len
|
|
+
|
|
+ if (len == 0) {
|
|
+ return ""
|
|
+ }
|
|
+
|
|
+ return user_string_n(@cast(cmds, "ngx_command_t", "NGX_SBIN_PATH")->name->data, len)
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_chain_buf(cl)
|
|
+{
|
|
+ return @cast(cl, "ngx_chain_t", "NGX_SBIN_PATH")->buf
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_in_memory(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->temporary
|
|
+ || @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->memory
|
|
+ || @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->mmap
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_pos(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->pos
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_file_pos(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->file_pos
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_last(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->last
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_file_last(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->file_last
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_end(b)
|
|
+{
|
|
+ return @cast(b, "ngx_buf_t", "NGX_SBIN_PATH")->end
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_size(b)
|
|
+{
|
|
+ if (ngx_buf_in_memory(b)) {
|
|
+ return ngx_buf_last(b) - ngx_buf_pos(b)
|
|
+ }
|
|
+
|
|
+ return ngx_buf_file_last(b) - ngx_buf_file_pos(b)
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_buf_data(b)
|
|
+{
|
|
+ return user_string_n(ngx_buf_pos(b), ngx_buf_last(b) - ngx_buf_pos(b))
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_pool_cleanup_file_name(c)
|
|
+{
|
|
+ return user_string(@cast(c, "ngx_pool_cleanup_file_t", "NGX_SBIN_PATH")->name)
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_http_req_content_length(r)
|
|
+{
|
|
+ return @cast(r, "ngx_http_request_t", "NGX_SBIN_PATH")->headers_in->content_length_n
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_http_req_body_temp_file_name(r)
|
|
+{
|
|
+ rb = @cast(r, "ngx_http_request_t", "NGX_SBIN_PATH")->request_body
|
|
+ if (!rb) {
|
|
+ return ""
|
|
+ }
|
|
+
|
|
+ tf = @cast(rb, "ngx_http_request_body_t", "NGX_SBIN_PATH")->temp_file
|
|
+ if (!tf) {
|
|
+ return ""
|
|
+ }
|
|
+
|
|
+ len = @cast(tf, "ngx_temp_file_t", "NGX_SBIN_PATH")->file->name->len
|
|
+
|
|
+ return user_string_n(@cast(tf, "ngx_temp_file_t", "NGX_SBIN_PATH")->file->name->data, len)
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_table_elt_key(e)
|
|
+{
|
|
+ len = @cast(e, "ngx_table_elt_t", "NGX_SBIN_PATH")->key->len
|
|
+
|
|
+ return user_string_n(@cast(e, "ngx_table_elt_t", "NGX_SBIN_PATH")->key->data, len)
|
|
+}
|
|
+
|
|
+
|
|
+function ngx_table_elt_value(e)
|
|
+{
|
|
+ len = @cast(e, "ngx_table_elt_t", "NGX_SBIN_PATH")->value->len
|
|
+
|
|
+ return user_string_n(@cast(e, "ngx_table_elt_t", "NGX_SBIN_PATH")->value->data, len)
|
|
+}
|
|
+
|
|
diff --git a/src/dtrace/nginx_provider.d b/src/dtrace/nginx_provider.d
|
|
new file mode 100644
|
|
index 0000000..483ac69
|
|
--- /dev/null
|
|
+++ b/src/dtrace/nginx_provider.d
|
|
@@ -0,0 +1,32 @@
|
|
+typedef struct { int dummy; } ngx_http_request_t;
|
|
+typedef struct { int dummy; } ngx_str_t;
|
|
+typedef int64_t ngx_int_t;
|
|
+typedef struct { int dummy; } ngx_module_t;
|
|
+typedef struct { int dummy; } ngx_http_module_t;
|
|
+typedef struct { int dummy; } ngx_table_elt_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);
|
|
+ probe http__module__post__config(ngx_module_t *m);
|
|
+ probe http__read__body__abort(ngx_http_request_t *r, char *reason);
|
|
+ probe http__read__body__done(ngx_http_request_t *r);
|
|
+ probe http__read__req__line__done(ngx_http_request_t *r);
|
|
+ probe http__read__req__header__done(ngx_http_request_t *r, ngx_table_elt_t *h);
|
|
+};
|
|
+
|
|
+
|
|
+#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 100755
|
|
index 0000000..5127fbe
|
|
--- /dev/null
|
|
+++ b/src/dtrace/stap-nginx
|
|
@@ -0,0 +1,6 @@
|
|
+#!/bin/sh
|
|
+
|
|
+PATH="NGX_SBIN_DIR:$PATH"
|
|
+export PATH
|
|
+exec stap -d "NGX_SBIN_PATH" --ldd -I "NGX_TAPSET_PREFIX" "$@"
|
|
+
|
|
diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
|
|
index 3e077fb..b7edb7b 100644
|
|
--- a/src/http/ngx_http.c
|
|
+++ b/src/http/ngx_http.c
|
|
@@ -8,6 +8,7 @@
|
|
#include <ngx_config.h>
|
|
#include <ngx_core.h>
|
|
#include <ngx_http.h>
|
|
+#include <ngx_http_probe.h>
|
|
|
|
|
|
static char *ngx_http_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
|
|
@@ -307,6 +308,9 @@ ngx_http_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
module = ngx_modules[m]->ctx;
|
|
|
|
if (module->postconfiguration) {
|
|
+
|
|
+ ngx_http_probe_module_post_config(ngx_modules[m]);
|
|
+
|
|
if (module->postconfiguration(cf) != NGX_OK) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
|
|
index c5db18f..f23ba51 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;
|
|
@@ -2491,6 +2494,8 @@ 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..d7d2d45
|
|
--- /dev/null
|
|
+++ b/src/http/ngx_http_probe.h
|
|
@@ -0,0 +1,75 @@
|
|
+#ifndef _NGX_HTTP_PROBE_H_INCLUDED_
|
|
+#define _NGX_HTTP_PROBE_H_INCLUDED_
|
|
+
|
|
+
|
|
+#include <ngx_config.h>
|
|
+#include <ngx_core.h>
|
|
+#include <ngx_http.h>
|
|
+
|
|
+
|
|
+#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)
|
|
+
|
|
+#define ngx_http_probe_module_post_config(m) \
|
|
+ NGINX_HTTP_MODULE_POST_CONFIG(m)
|
|
+
|
|
+#define ngx_http_probe_read_body_abort(r, reason) \
|
|
+ NGINX_HTTP_READ_BODY_ABORT(r, reason)
|
|
+
|
|
+#define ngx_http_probe_read_body_done(r) \
|
|
+ NGINX_HTTP_READ_BODY_DONE(r)
|
|
+
|
|
+#define ngx_http_probe_read_req_line_done(r) \
|
|
+ NGINX_HTTP_READ_REQ_LINE_DONE(r)
|
|
+
|
|
+#define ngx_http_probe_read_req_header_done(r, h) \
|
|
+ NGINX_HTTP_READ_REQ_HEADER_DONE(r, h)
|
|
+
|
|
+#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)
|
|
+#define ngx_http_probe_module_post_config(m)
|
|
+#define ngx_http_probe_read_body_abort(r, reason)
|
|
+#define ngx_http_probe_read_body_done(r)
|
|
+#define ngx_http_probe_read_req_line_done(r)
|
|
+#define ngx_http_probe_read_req_header_done(r, h)
|
|
+
|
|
+#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 436e17d..6dc5cb2 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);
|
|
@@ -864,6 +865,8 @@ ngx_http_process_request_line(ngx_event_t *rev)
|
|
}
|
|
#endif
|
|
|
|
+ ngx_http_probe_read_req_line_done(r);
|
|
+
|
|
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
"http request line: \"%V\"", &r->request_line);
|
|
|
|
@@ -1109,6 +1112,8 @@ ngx_http_process_request_headers(ngx_event_t *rev)
|
|
return;
|
|
}
|
|
|
|
+ ngx_http_probe_read_req_header_done(r, h);
|
|
+
|
|
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
"http header: \"%V: %V\"",
|
|
&h->key, &h->value);
|
|
@@ -1963,7 +1968,11 @@ 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
|
|
@@ -2013,6 +2022,8 @@ 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);
|
|
}
|
|
@@ -2049,10 +2060,14 @@ 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);
|
|
@@ -2064,6 +2079,8 @@ 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);
|
|
diff --git a/src/http/ngx_http_request_body.c b/src/http/ngx_http_request_body.c
|
|
index f0e671a..37ec5d2 100644
|
|
--- a/src/http/ngx_http_request_body.c
|
|
+++ b/src/http/ngx_http_request_body.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_read_client_request_body_handler(ngx_http_request_t *r);
|
|
@@ -40,11 +41,15 @@ ngx_http_read_client_request_body(ngx_http_request_t *r,
|
|
r->main->count++;
|
|
|
|
if (r->request_body || r->discard_body || r->content_length_n == 0) {
|
|
+ ngx_http_probe_read_body_abort(r,
|
|
+ r->request_body ? "body exists"
|
|
+ : "body discarded");
|
|
post_handler(r);
|
|
return NGX_OK;
|
|
}
|
|
|
|
if (ngx_http_test_expect(r) != NGX_OK) {
|
|
+ ngx_http_probe_read_body_abort(r, "test expect failed");
|
|
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
|
|
@@ -56,6 +61,7 @@ ngx_http_read_client_request_body(ngx_http_request_t *r,
|
|
r->request_body = rb;
|
|
|
|
if (r->headers_in.content_length_n < 0) {
|
|
+ ngx_http_probe_read_body_abort(r, "no content length");
|
|
post_handler(r);
|
|
return NGX_OK;
|
|
}
|
|
@@ -89,10 +95,13 @@ ngx_http_read_client_request_body(ngx_http_request_t *r,
|
|
tf->persistent, tf->clean, tf->access)
|
|
!= NGX_OK)
|
|
{
|
|
+ ngx_http_probe_read_body_abort(r, "create temp file failed");
|
|
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
}
|
|
|
|
+ ngx_http_probe_read_body_done(r);
|
|
+
|
|
post_handler(r);
|
|
|
|
return NGX_OK;
|
|
@@ -148,10 +157,13 @@ ngx_http_read_client_request_body(ngx_http_request_t *r,
|
|
|
|
if (r->request_body_in_file_only) {
|
|
if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
|
|
+ ngx_http_probe_read_body_abort(r, "write temp file failed");
|
|
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
}
|
|
|
|
+ ngx_http_probe_read_body_done(r);
|
|
+
|
|
post_handler(r);
|
|
|
|
return NGX_OK;
|
|
@@ -245,6 +257,7 @@ ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
|
|
ngx_int_t rc;
|
|
|
|
if (r->connection->read->timedout) {
|
|
+ ngx_http_probe_read_body_abort(r, "timed out");
|
|
r->connection->timedout = 1;
|
|
ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
|
|
return;
|
|
@@ -279,6 +292,7 @@ ngx_http_do_read_client_request_body(ngx_http_request_t *r)
|
|
if (rb->buf->last == rb->buf->end) {
|
|
|
|
if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
|
|
+ ngx_http_probe_read_body_abort(r, "write temp file failed");
|
|
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
|
|
@@ -302,6 +316,9 @@ ngx_http_do_read_client_request_body(ngx_http_request_t *r)
|
|
}
|
|
|
|
if (n == 0) {
|
|
+
|
|
+ ngx_http_probe_read_body_abort(r, "connection closed");
|
|
+
|
|
ngx_log_error(NGX_LOG_INFO, c->log, 0,
|
|
"client prematurely closed connection");
|
|
}
|
|
@@ -352,6 +369,7 @@ ngx_http_do_read_client_request_body(ngx_http_request_t *r)
|
|
/* save the last part */
|
|
|
|
if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
|
|
+ ngx_http_probe_read_body_abort(r, "write temp file failed");
|
|
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
|
|
@@ -381,6 +399,8 @@ ngx_http_do_read_client_request_body(ngx_http_request_t *r)
|
|
|
|
r->read_event_handler = ngx_http_block_reading;
|
|
|
|
+ ngx_http_probe_read_body_done(r);
|
|
+
|
|
rb->post_handler(r);
|
|
|
|
return NGX_OK;
|