Use MODULE_NAME in stap-probe instead of IN_LIB

Define MODULE_NAME in the build command and define IN_MODULE using
MODULE_NAME.  Verified that the generated code is unchanged on x86_64.

	* Makeconfig (module-cppflags-real): Define MODULE_NAME
	instead of IN_MODULE.
	* include/libc-symbols.h (IN_MODULE): Define using
	MODULE_NAME.
	(PASTE_NAME, PASTE_NAME1): New macros.
	* include/stap-probe.h (LIBC_PROBE_1): Use MODULE_NAME instead
	of IN_LIB.
	(STAP_PROBE_ASM): Likewise.

4 files changed, 21 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 0bde88c..43759c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2014-11-24  Siddhesh Poyarekar  <siddhesh@redhat.com>
+
+	* Makeconfig (module-cppflags-real): Define MODULE_NAME
+	instead of IN_MODULE.
+	* include/libc-symbols.h (IN_MODULE): Define using
+	MODULE_NAME.
+	(PASTE_NAME, PASTE_NAME1): New macros.
+	* include/stap-probe.h (LIBC_PROBE_1): Use MODULE_NAME instead
+	of IN_LIB.
+	(STAP_PROBE_ASM): Likewise.
+
 2014-11-23  Samuel Thibault  <samuel.thibault@ens-lyon.org>
 
 	* sysdeps/mach/hurd/i386/init-first.c (posixland_init): Call
diff --git a/Makeconfig b/Makeconfig
index 1a26cc5..bbf5460 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -830,9 +830,9 @@ in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
 				    libc))
 
 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
-		       -DIN_MODULE=MODULE_$(in-module)
+		       -DMODULE_NAME=$(in-module)
 
-# We don't need libc-modules.h and the IN_MODULE definition for
+# We don't need libc-modules.h and the MODULE_NAME definition for
 # shlib-version.v.i.
 module-cppflags = $(if $(filter $(@F),$(skip-module-cppflags)), \
 		       ,$(module-cppflags-real))
@@ -1008,7 +1008,7 @@ postclean-generated += soversions.mk soversions.i \
 before-compile += $(common-objpfx)libc-modules.h
 ifeq ($(soversions.mk-done),t)
 # Generate a header with macro definitions for use with the IS_IN macro.
-# These are the possible values for the IN_MODULE macro defined when building
+# These are the possible values for the MODULE_NAME macro defined when building
 # sources, to identify which module the translation unit is going to be built
 # into.
 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 9c5c9bb..5cbf473 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -20,8 +20,12 @@
 #ifndef _LIBC_SYMBOLS_H
 #define _LIBC_SYMBOLS_H	1
 
+#define IN_MODULE PASTE_NAME (MODULE_, MODULE_NAME)
 #define IS_IN(lib) (IN_MODULE == MODULE_##lib)
 
+#define PASTE_NAME(a,b)      PASTE_NAME1 (a,b)
+#define PASTE_NAME1(a,b)     a##b
+
 /* This file's macros are included implicitly in the compilation of every
    file in the C library by -imacros.
 
diff --git a/include/stap-probe.h b/include/stap-probe.h
index 688646c..150fc1e 100644
--- a/include/stap-probe.h
+++ b/include/stap-probe.h
@@ -30,7 +30,7 @@
 
    Systemtap's header defines the macros STAP_PROBE (provider, name) and
    STAP_PROBEn (provider, name, arg1, ..., argn).  For "provider" we paste
-   in the IN_LIB name (libc, libpthread, etc.) automagically.
+   in MODULE_NAME (libc, libpthread, etc.) automagically.
 
    The format of the arg parameters is discussed here:
 
@@ -53,7 +53,7 @@
 # endif
 
 # define LIBC_PROBE(name, n, ...)	\
-  LIBC_PROBE_1 (IN_LIB, name, n, ## __VA_ARGS__)
+  LIBC_PROBE_1 (MODULE_NAME, name, n, ## __VA_ARGS__)
 
 # define LIBC_PROBE_1(lib, name, n, ...) \
   STAP_PROBE##n (lib, name, ## __VA_ARGS__)
@@ -61,7 +61,7 @@
 # define STAP_PROBE0		STAP_PROBE
 
 # define LIBC_PROBE_ASM(name, template) \
-  STAP_PROBE_ASM (IN_LIB, name, template)
+  STAP_PROBE_ASM (MODULE_NAME, name, template)
 
 # define LIBC_PROBE_ASM_OPERANDS STAP_PROBE_ASM_OPERANDS