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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.
This commit is contained in:
Siddhesh Poyarekar 2014-11-20 11:42:00 +05:30
parent e0cfa51064
commit 279bc5b3c3
4 changed files with 21 additions and 6 deletions
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11
ChangeLog
View File

@ -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

6
Makeconfig
View File

@ -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; @:

4
include/libc-symbols.h
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@ -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.

6
include/stap-probe.h
View File

@ -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