middle-end/7898: gcc-3.2 readdir_r regression on solaris 2.6

middle-end/7898: gcc-3.2 readdir_r regression on solaris 2.6

[sadinoff]

>Number:         7898
>Category:       middle-end
>Synopsis:       readdir_r gives bad results with gcc-3.1 and 3.2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 12 12:36:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        3.2
>Organization:
>Environment:
System: SunOS xxx.yyy.zzz.com 5.6 Generic_105181-30 sun4u sparc SUNW,Ultra-Enterprise
Architecture: sun4

	<machine, os, target, libraries (multiple lines)>
host: sparc-sun-solaris2.6
build: sparc-sun-solaris2.6
target: sparc-sun-solaris2.6
configured with: ../gcc-3.2/configure --prefix=/opt/gcc-3.2 --with-gnu-as --with-as=/opt/bin/as --with-gnu-ld --with-ld=/opt/bin/ld
>Description:
	Note that this was built with gas and gld from binutils 2.12.1
		
	When migrating from gcc-2.95.1 to gcc-3.1 and 3.2, I notice that readdir_r has gone haywire.
	This may have something to do with fixincludes, but I can't quite tell.  

        As you may know, the solaris include file for dirent.h is a mess, so I'm compiling with 
        CPPFLAGS += -D_POSIX_C_SOURCE=200106L
        CPPFLAGS += -D_FILE_OFFSET_BITS=64
	  
	which should make things as POSIX as possible.

	Basically, it looks like readdir_r is overwriting the stack
        and other nasty things in 3.2, and it was well-behaved with gcc-2.95.1
	
>How-To-Repeat:
	Enclosed is a makefile and c source to compare the two compilers.  I'm also including the preprocessor output from both.
	

### Here are the results:
$ make test-all
make[1]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'
rm -f test-readdir *.o
make[1]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'
make[1]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'


COMPILER IS /opt/gcc-2.95.1/bin/gcc
make run
make[2]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'
/opt/gcc-2.95.1/bin/gcc  -D_POSIX_C_SOURCE=200106L -D_FILE_OFFSET_BITS=64 -g  -c -o test-readdir.o test-readdir.c
/opt/gcc-2.95.1/bin/gcc test-readdir.o -o test-readdir
./test-readdir .
<count is 0
>Fix:
	Unknown

--ELM1031858850-3469-0_
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--ELM1031858850-3469-0_--
>Release-Note:
>Audit-Trail:
>Unformatted:
 --ELM1031858850-3469-0_
 Content-Transfer-Encoding: 7bit
 Content-Type: text/plain; charset=US-ASCII
 
 >count is 0
 result:0, file: .
 entryPointer is efffdf58
 
 <count is 1
 >count is 1
 result:0, file: ..
 entryPointer is efffdf58
 
 <count is 2
 >count is 2
 result:0, file: .svn
 entryPointer is efffdf58
 
 <count is 3
 >count is 3
 result:0, file: test-readdir.c
 entryPointer is efffdf58
 
 <count is 4
 >count is 4
 result:0, file: Makefile
 entryPointer is efffdf58
 
 <count is 5
 >count is 5
 result:0, file: test-readdir.o
 entryPointer is efffdf58
 
 <count is 6
 >count is 6
 result:0, file: test-readdir
 entryPointer is efffdf58
 
 <count is 7
 >count is 7
 result:-1, file: test-readdir
 entryPointer is 0
 
 returned nonzero.
 found 7 files
 make[2]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'
 make[1]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'
 make[1]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'
 rm -f test-readdir *.o
 make[1]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'
 make[1]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'
 
 
 COMPILER IS /opt/gcc-3.2/bin/gcc
 make run
 make[2]: Entering directory `/home/sadind/tmp/sadind/test-readdir_r'
 /opt/gcc-3.2/bin/gcc  -D_POSIX_C_SOURCE=200106L -D_FILE_OFFSET_BITS=64 -g  -c -o test-readdir.o test-readdir.c
 /opt/gcc-3.2/bin/gcc test-readdir.o -o test-readdir
 ./test-readdir .
 <count is 0
 >count is 0
 result:0, file: .
 entryPointer is efffdf88
 
 <count is 1
 >count is 1
 result:0, file: ..
 entryPointer is efffdf88
 
 <count is 2
 >count is 2
 result:0, file: .svn
 entryPointer is efffdf88
 
 <count is 3
 >count is 1769090659
 result:0, file: test-readdir.c
 entryPointer is efffdf88
 
 badness.  count is too large
 found 1769090659 files
 make[2]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'
 make[1]: Leaving directory `/home/sadind/tmp/sadind/test-readdir_r'