From:	scox AT cygnus DOT com (Stan Cox)
Subject:	gprof support
5 Jun 1998 19:09:35 -0700 :
Message-ID:	<nru35zi9su.fsf.cygnus.cygwin32.developers@rtl.cygnus.com>
References:	scox AT cygnus DOT com (Stan Cox)
To:	cygwin32-developers AT cygnus DOT com

Any thoughts on where to hook in gprof support?  Currently I add the
gprof routines (gmon, mcount, and profil) to the cygwin dll, which is
probably not ideal.  I added a gcrt0 which is a clone of crt0 except
it calls cygwin_gcrt0 in libccrt0.cc.  One thought was to have a
separate library for gprof.  This is what linux does.

Index: Makefile.in
===================================================================
RCS file: /cvs/cvsfiles/devo/winsup/Makefile.in,v
retrieving revision 1.100
diff -u -p -u -r1.100 Makefile.in
--- Makefile.in	1998/04/21 19:39:02	1.100
+++ Makefile.in	1998/06/04 19:47:12
@@ -244,12 +244,14 @@ DLL_OFILES = $(EXTRA_DLL_OFILES) \
 	fhandler.o 		\
 	fork.o 			\
 	glob.o			\
+	gmon.o			\
 	grp.o 			\
 	heap.o	 		\
 	hinfo.o			\
 	init.o 			\
 	ioctl.o 		\
 	malloc.o		\
+	mcount.o		\
 	mmap.o                  \
 	net.o			\
 	ntea.o			\
@@ -257,6 +259,7 @@ DLL_OFILES = $(EXTRA_DLL_OFILES) \
 	path.o 			\
 	pinfo.o			\
 	pipe.o 			\
+	profil.o		\
 	registry.o  		\
 	resource.o 		\
 	security.o		\
Index: cygwin.din
===================================================================
RCS file: /cvs/cvsfiles/devo/winsup/cygwin.din,v
retrieving revision 1.74
diff -u -p -u -r1.74 cygwin.din
--- cygwin.din	1998/04/21 19:18:45	1.74
+++ cygwin.din	1998/06/04 19:47:14
@@ -423,6 +423,8 @@ mbstowcs
 _mbstowcs = mbstowcs
 mbtowc
 _mbtowc = mbtowc
+mcount
+_mcount = mcount
 memchr
 _memchr = memchr
 memcmp
@@ -444,6 +446,8 @@ _mktemp = mktemp
 mktime
 _mktime = mktime
 mmap
+monstartup
+_monstartup = monstartup
 mprotect
 msync
 munmap
@@ -475,6 +479,8 @@ powf
 _powf = powf
 printf
 _printf = printf
+profil
+_profil = profil
 putc
 _putc = putc
 putchar
@@ -943,4 +949,4 @@ dlsym
 dlerror
 dlfork
 sigpause
-cygwin32_attach_handle_to_fd
+cygwin32_attach_handle_to_fd 
Index: libccrt0.cc
===================================================================
RCS file: /cvs/cvsfiles/devo/winsup/libccrt0.cc,v
retrieving revision 1.24
diff -u -p -u -r1.24 libccrt0.cc
--- libccrt0.cc	1998/02/21 22:43:57	1.24
+++ libccrt0.cc	1998/06/04 19:47:15
@@ -99,6 +99,22 @@ void cygwin_crt0 (MainFunc f)
   dll_crt0 (&cygwin_statu); 
 }
 
+/* for main module */
+extern u_char etext asm("etext");
+extern u_char eprol asm("eprol");
+extern void _mcleanup();
+void cygwin_gcrt0 (MainFunc f)
+{
+  cygwin_crt0_common (f);
+  
+  monstartup((u_long)&eprol, (u_long)&etext);
+
+ /* Jump into the dll. */
+  dll_crt0 (&cygwin_statu); 
+}
+asm(".text");
+asm("eprol:");
+
 /* for a loaded dll */
 int cygwin32_attach_dll (HMODULE h, MainFunc f)
 {

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