Add a startup tracepoint.

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>

Makefile.in

@@ -4,7 +4,7 @@ CLEAN_SUBDIRS = test
 
 PROGRAM_NAME         = $(progname)
 PROGRAM_SOURCES      = modules.c
-PROGRAM_LDADD        = buildmark.o $(HTTPD_LDFLAGS) $(PROGRAM_DEPENDENCIES) $(HTTPD_LIBS) $(EXTRA_LIBS) $(AP_LIBS) $(LIBS)
+PROGRAM_LDADD        = buildmark.o $(HTTPD_LDFLAGS) $(PROGRAM_DEPENDENCIES) $(HTTPD_LIBS) $(EXTRA_LIBS) $(AP_LIBS) $(LIBS) -ldl -llttng-ust
 PROGRAM_PRELINK      = $(COMPILE) -c $(top_srcdir)/server/buildmark.c
 PROGRAM_DEPENDENCIES = \
   server/libmain.la \

server/Makefile.in

@@ -18,7 +18,7 @@ LTLIBRARY_SOURCES = \
 	apreq_cookie.c apreq_error.c apreq_module.c \
 	apreq_module_cgi.c apreq_module_custom.c apreq_param.c \
 	apreq_parser.c apreq_parser_header.c apreq_parser_multipart.c \
-	apreq_parser_urlencoded.c apreq_util.c
+	apreq_parser_urlencoded.c apreq_util.c tracepoints.c
 
 LTLIBRARY_DEPENDENCIES = test_char.h
 

server/main.c

@@ -41,6 +41,8 @@
 #include "util_ebcdic.h"
 #include "ap_mpm.h"
 
+#include "tracepoints.h"
+
 #if APR_HAVE_UNISTD_H
 #include <unistd.h>
 #else
@@ -298,6 +300,8 @@ static process_rec *init_process(int *argc, const char * const * *argv)
     apr_status_t stat;
     const char *failed = "apr_app_initialize()";
 
+    tracepoint(apache, apache_process_entry);
+
     stat = apr_app_initialize(argc, argv, NULL);
     if (stat == APR_SUCCESS) {
         failed = "apr_pool_create()";

server/tracepoints.c

@@ -0,0 +1,7 @@
+
+#define TRACEPOINT_CREATE_PROBES
+/*
+ * The header containing our TRACEPOINT_EVENTs.
+ */
+#define TRACEPOINT_DEFINE
+#include "tracepoints.h"

server/tracepoints.h

@@ -0,0 +1,22 @@
+
+#undef TRACEPOINT_PROVIDER
+#define TRACEPOINT_PROVIDER apache
+
+#undef TRACEPOINT_INCLUDE
+#define TRACEPOINT_INCLUDE "./tracepoints.h"
+
+#if !defined(TRACEPOINTS_H) || defined(TRACEPOINT_HEADER_MULTI_READ)
+#define TRACEPOINTS_H
+
+#include <lttng/tracepoint.h>
+
+TRACEPOINT_EVENT(
+    apache,
+    apache_process_entry,
+    TP_ARGS(),
+    TP_FIELDS()
+ )
+
+#endif /* TRACEPOINTS_H */
+
+#include <lttng/tracepoint-event.h>

server/tracepoints.tp

@@ -0,0 +1,6 @@
+TRACEPOINT_EVENT(
+    apache,
+    apache_process_entry,
+    TP_ARGS(),
+    TP_FIELDS()
+ )