[Bug c/37156] New: Hangwith -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[Bug c/37156] New: Hangwith -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

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cw@lysdexia:~/wk/sqlite-cvs-git/build$ gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.3.1-2'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-cld --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.3.1 (Debian 4.3.1-2)

I get a hang:

cw@lysdexia:~/wk/sqlite-cvs-git/build$ gcc -Wall -c -O2 -g malloc.i
malloc.i: In function ‘sqlite3_memory_used’:
malloc.i:10: warning: call to ‘sqlite3_status’ declared with attribute warning:
is experimental
  <...hang...>

malloc.i (below, and which i will also attach if i can) is derived from
malloc.c from sqlite (CVS as of this morning), i butchered it as much a i could
to make it as small as possible but still show the problem.

-O1 -g hangs
-O2 is ok
-O2 -g hangs

if you take out either function or any calls the hang seems to go away


cw@lysdexia:~/wk/sqlite-cvs-git/build$ cat malloc.i

typedef long long int sqlite_int64;
typedef sqlite_int64 sqlite3_int64;

__attribute__ ((warning ("is experimental"))) int sqlite3_status(int op, int
*pCurrent, int *pHighwater, int resetFlag);

sqlite3_int64 sqlite3_memory_used(void){
  int n, mx;
  sqlite3_int64 res;
  sqlite3_status(0, &n, &mx, 0);
  res = (sqlite3_int64)n;
  return res;
}

void sqlite3_soft_heap_limit(int n){
  int overage;
  overage = sqlite3_memory_used() - n;
}


-- 
           Summary: Hangwith -g -O2 (or higher)  (discovered with malloc.c
                    in sqlite3)
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: cw at f00f dot org
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] Hangwith -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

------- Comment #1 from cw at f00f dot org  2008-08-18 22:34 -------
Created an attachment (id=16091)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16091&action=view)
malloc.i hangs with -O2 -g on gcc 4.3.1


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] Hangwith -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

------- Comment #2 from cw at f00f dot org  2008-08-18 22:37 -------
(sorry, this should have been clarified earlier)

-O1 -g is fine
-O2 is fine
-O2 -g HANGS

dropping __attribute__((warning...) also makes the hang go away --- so
interaction with that an debugging?

gcc 4.1 is fine
gcc 4.2 is fine
gcc 4.4 untested


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

------- Comment #3 from cw at f00f dot org  2008-08-19 00:38 -------
Someone was able to reproduce the hang and pointed out the first attachment I
put up as edited without the __attribute__

Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
--enable-shared
--enable-threads=posix --enable-checking=release --with-system-zlib
--enable-__cxa_atexit
--disable-libunwind-exceptions
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada
--enable-java-awt=gtk --disable-dssi --enable-plugin
 --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile
--enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--disable-libjava-multilib
--with-cpu=generic --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.3.1 20080708 (Red Hat 4.3.1-4) (GCC)


-- 

cw at f00f dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Hangwith -g -O2 (or higher) |Hang with -g -O2 (or higher)
                   |(discovered with malloc.c in|(discovered with malloc.c in
                   |sqlite3)                    |sqlite3)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

------- Comment #4 from cw at f00f dot org  2008-08-19 00:41 -------
Created an attachment (id=16092)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16092&action=view)
updated test case that actually shows the hang


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[cw at f00f dot org]

------- Comment #5 from cw at f00f dot org  2008-08-19 00:42 -------
(From update of attachment 16091)
doesn't show the hang as __attribute__ is missing


-- 

cw at f00f dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #16091|0                           |1
        is obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] [4.3 Regression] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2008-08-19 07:42 -------
Related to PR36811, except in a different routine.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-08-19 07:42:50
               date|                            |
            Summary|Hang with -g -O2 (or higher)|[4.3 Regression] Hang with -
                   |(discovered with malloc.c in|g -O2 (or higher)
                   |sqlite3)                    |(discovered with malloc.c in
                   |                            |sqlite3)
   Target Milestone|---                         |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] [4.3 Regression] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2008-08-19 11:46 -------
Subject: Bug 37156

Author: jakub
Date: Tue Aug 19 11:44:42 2008
New Revision: 139230

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139230
Log:
        PR debug/37156
        * pretty-print.c (pp_base_format): Deal with recursive BLOCK trees.
        * tree.c (block_nonartificial_location): Likewise.

        * error.c (cp_print_error_function): Deal with recursive BLOCK trees.

        * gcc.dg/pr37156.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr37156.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/error.c
    trunk/gcc/pretty-print.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] [4.3 Regression] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2008-08-19 11:51 -------
Subject: Bug 37156

Author: jakub
Date: Tue Aug 19 11:50:11 2008
New Revision: 139231

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139231
Log:
        PR debug/37156
        * pretty-print.c (pp_base_format): Deal with recursive BLOCK trees.
        * tree.c (block_nonartificial_location): Likewise.

        * error.c (cp_print_error_function): Deal with recursive BLOCK trees.

        * gcc.dg/pr37156.c: New test.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/pr37156.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/cp/ChangeLog
    branches/gcc-4_3-branch/gcc/cp/error.c
    branches/gcc-4_3-branch/gcc/pretty-print.c
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_3-branch/gcc/tree.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156

[Bug debug/37156] [4.3 Regression] Hang with -g -O2 (or higher) (discovered with malloc.c in sqlite3)

[jakub at gcc dot gnu dot org]

------- Comment #9 from jakub at gcc dot gnu dot org  2008-08-19 11:52 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37156