From a9eb302abaccdd3609d81ba75434cccaed49f4fd Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Mon, 27 Apr 2015 19:17:20 -0700
Subject: STAP annotation working.

Test annotations made to client_channel.c (start_rpc) and channel_create.c
(grpc_channel_create).
---
 Makefile | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 2def6e2413..1955e2fa48 100644
--- a/Makefile
+++ b/Makefile
@@ -183,6 +183,7 @@ DEFINES_gcov = NDEBUG
 prefix ?= /usr/local
 
 PROTOC = protoc
+DTRACE = dtrace
 CONFIG ?= opt
 CC = $(CC_$(CONFIG))
 CXX = $(CXX_$(CONFIG))
@@ -350,6 +351,8 @@ PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perfto
 PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
 PROTOC_CHECK_CMD = which protoc > /dev/null
 PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
+DTRACE_CHECK_CMD = which dtrace > /dev/null
+SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
 
 ifeq ($(OPENSSL_REQUIRES_DL),true)
 OPENSSL_ALPN_CHECK_CMD += -ldl
@@ -382,6 +385,19 @@ else
 HAS_VALID_PROTOC = false
 endif
 
+# Check for Systemtap (https://sourceware.org/systemtap/), first by making sure <sys/sdt.h> is present
+# in the system and secondly by checking for the "dtrace" binary (on Linux, this is part of the Systemtap
+# distribution. It's part of the base system on BSD/Solaris machines).
+HAS_SYSTEMTAP_HEADERS = $(shell $(SYSTEMTAP_HEADERS_CHECK_CMD) 2> /dev/null && echo true || echo false)
+HAS_DTRACE = $(shell $(DTRACE_CHECK_CMD) 2> /dev/null && echo true || echo false)
+HAS_SYSTEMTAP = false
+ifeq ($(HAS_SYSTEMTAP_HEADERS),true)
+ifeq ($(HAS_DTRACE),true)
+HAS_SYSTEMTAP = true
+DEFINES += GRPC_STAP_PROFILER
+endif
+endif
+
 ifeq ($(wildcard third_party/openssl/ssl/ssl.h),)
 HAS_EMBEDDED_OPENSSL_ALPN = false
 else
@@ -2779,6 +2795,15 @@ $(GENDIR)/test/proto/test.grpc.pb.cc: test/proto/test.proto $(PROTOBUF_DEP) $(PR
 endif
 
 
+ifeq ($(HAS_SYSTEMTAP),true)
+$(GENDIR)/src/core/profiling/stap_probes.h: src/core/profiling/stap_probes.d
+	$(E) "[DTRACE]  Compiling $<"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(DTRACE) -C -h -s $< -o $@
+
+src/core/profiling/timers.h: $(GENDIR)/src/core/profiling/stap_probes.h
+endif
+
 $(OBJDIR)/$(CONFIG)/%.o : %.c
 	$(E) "[C]       Compiling $<"
 	$(Q) mkdir -p `dirname $@`
-- 
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