[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #29 from mrs at gcc dot gnu.org mrs at gcc dot gnu.org 2012-03-02 18:21:46 UTC --- Author: mrs Date: Fri Mar 2 18:21:41 2012 New Revision: 184809 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=184809 Log: 2012-03-02 Jack Howarth howa...@bromo.med.uc.edu Backport from mainline 2012-02-23 Patrick Marlier patrick.marl...@gmail.com Jack Howarth howa...@bromo.med.uc.edu PR boehm-gc/52179 * include/gc_config.h.in: Undefine HAVE_PTHREAD_GET_STACKADDR_NP. * include/private/gcconfig.h (DARWIN): Define STACKBOTTOM with pthread_get_stackaddr_np when available. * configure.ac (THREADS): Check availability of pthread_get_stackaddr_np. * configure: Regenerate. 2012-03-02 Jack Howarth howa...@bromo.med.uc.edu Backport from mainline 2012-02-23 Patrick Marlier patrick.marl...@gmail.com Jack Howarth howa...@bromo.med.uc.edu PR target/49461 * configure.ac (SYSTEMSPEC): No longer pass -no_pie for darwin11. * configure: Regenerate. Modified: branches/gcc-4_6-branch/boehm-gc/ChangeLog branches/gcc-4_6-branch/boehm-gc/configure branches/gcc-4_6-branch/boehm-gc/configure.ac branches/gcc-4_6-branch/boehm-gc/include/gc_config.h.in branches/gcc-4_6-branch/boehm-gc/include/private/gcconfig.h branches/gcc-4_6-branch/libjava/ChangeLog branches/gcc-4_6-branch/libjava/configure branches/gcc-4_6-branch/libjava/configure.ac
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 m...@gcc.gnu.org mrs at gcc dot gnu.org changed: What|Removed |Added CC||mrs at gcc dot gnu.org Known to work||4.6.4, 4.7.0 --- Comment #30 from mrs at gcc dot gnu.org mrs at gcc dot gnu.org 2012-03-02 18:35:01 UTC --- Fixed in 4.6.4 and 4.7.0.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 Jack Howarth howarth at nitro dot med.uc.edu changed: What|Removed |Added Status|NEW |RESOLVED Resolution||FIXED --- Comment #28 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-29 03:53:50 UTC --- Fixed at r184555.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #27 from pmarlier at gcc dot gnu.org 2012-02-24 15:21:20 UTC --- Author: pmarlier Date: Fri Feb 24 15:21:12 2012 New Revision: 184555 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=184555 Log: 2012-02-23 Patrick Marlier patrick.marl...@gmail.com Jack Howarth howa...@bromo.med.uc.edu boehm-gc/ PR boehm-gc/52179 * include/gc_config.h.in: Undefine HAVE_PTHREAD_GET_STACKADDR_NP. * include/private/gcconfig.h (DARWIN): Define STACKBOTTOM with pthread_get_stackaddr_np when available. * configure.ac (THREADS): Check availability of pthread_get_stackaddr_np. * configure: Regenerate. libjava/ PR target/49461 * configure.ac (SYSTEMSPEC): No longer pass -no_pie for darwin11. * configure: Regenerate. Modified: trunk/boehm-gc/ChangeLog trunk/boehm-gc/configure trunk/boehm-gc/configure.ac trunk/boehm-gc/include/gc_config.h.in trunk/boehm-gc/include/private/gcconfig.h trunk/libjava/ChangeLog trunk/libjava/configure trunk/libjava/configure.ac
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #12 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 15:07:17 UTC --- (In reply to comment #11) Ah, the better way to do that would be to have: AC_CHECK_FUNCS([pthread_get_stackaddr_np]) in configure.ac, and then just have #ifdef HAVE_PTHREAD_GET_STACKADDR_NP #define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self()) #endif This should cover all the issues with NO_PTHREAD... Where do you want the second change made? Should I place that in include/gc_config.h.in (which only contains #undefs right now) or in include/gc_config_macros.h or in os_dep.c? I notice that HAVE_PTHREAD_GETATTR_NP is only used in pthread_support.c. The rest of the patch looks like... Index: configure.ac === --- configure.ac(revision 184508) +++ configure.ac(working copy) @@ -380,6 +380,7 @@ esac oldLIBS=$LIBS LIBS=$LIBS $THREADLIBS AC_CHECK_FUNCS([pthread_getattr_np]) +AC_CHECK_FUNCS([pthread_get_stackaddr_np]) LIBS=$oldLIBS # Configuration of machine-dependent code Index: include/gc_config.h.in === --- include/gc_config.h.in(revision 184508) +++ include/gc_config.h.in(working copy) @@ -87,6 +87,9 @@ /* Define to 1 if you have the `pthread_getattr_np' function. */ #undef HAVE_PTHREAD_GETATTR_NP +/* Define to 1 if you have the `pthread_get_stackaddr_np_np' function. */ +#undef HAVE_PTHREAD_GET_STACKADDR_NP + /* Define to 1 if you have the stdint.h header file. */ #undef HAVE_STDINT_H Index: configure === --- configure(revision 184508) +++ configure(working copy) @@ -15141,6 +15141,17 @@ _ACEOF fi done +for ac_func in pthread_get_stackaddr_np +do : + ac_fn_c_check_func $LINENO pthread_get_stackaddr_np ac_cv_func_pthread_get_stackaddr_np +if test x$ac_cv_func_pthread_get_stackaddr_np = xyes; then : + cat confdefs.h _ACEOF +#define HAVE_PTHREAD_GET_STACKADDR_NP 1 +_ACEOF + +fi +done + LIBS=$oldLIBS # Configuration of machine-dependent code
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 Iain Sandoe iains at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2012-02-23 Ever Confirmed|0 |1 --- Comment #13 from Iain Sandoe iains at gcc dot gnu.org 2012-02-23 15:16:57 UTC --- (In reply to comment #9) (In reply to comment #8) but often the -m64 results show the failure... WARNING: program timed out. FAIL: boehm-gc.c/thread_leak_test.c -O2 execution test Running /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120222/boehm-gc/testsuite/boehm-gc.lib/lib.exp This (random) fail is also seen on x86-d9/d10 - so not something related to the pie shifts. I've not had time to investigate - but suspect it is related to operating close to stack limits -- if you try reducing the number of recursions (like PPC does) does this go away?
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #14 from Patrick Marlier patrick.marlier at gmail dot com 2012-02-23 15:32:31 UTC --- (In reply to comment #9) (In reply to comment #8) This change bootstraps fine with current gcc trunk on x86_64-apple-darwin11. It almost fixes the failures in the boehm-gc test suite. The -m32 results always pass as... === boehm-gc Summary for unix/-m32 === # of expected passes12 # of unsupported tests1 but often the -m64 results show the failure... WARNING: program timed out. FAIL: boehm-gc.c/thread_leak_test.c -O2 execution test Running /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120222/boehm-gc/testsuite/boehm-gc.lib/lib.exp ... === boehm-gc Summary for unix/-m64 === # of expected passes11 # of unexpected failures1 # of unsupported tests1 Are there any other darwin related changes upstream? I also notice this failure on x86_64 linux. In my case, it is due to the redefinition of GC_LINUX_THREADS. ./boehm-gc/include/gc_config.h:44:0: warning: GC_LINUX_THREADS redefined [enabled by default]^M ./boehm-gc/testsuite/boehm-gc.c/thread_leak_test.c:1:0: note: this is the location of the previous definition What does the log tell you?
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #16 from Patrick Marlier patrick.marlier at gmail dot com 2012-02-23 15:49:26 UTC --- Created attachment 26735 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=26735 proposal fix I have also started a patch (not tested at all) but I am more extreme in the approach and confines the change to boehm-gc and darwin x86/x86_64 (Lion doesn't support PPC, right?). Does the change to x86 is required? I am not sure... This is a workaround for 4.7 but I think boehm-gc should be updated for 4.8? Jack/Iain/Mike, I think it is wise to let you fix it since I have no access to a darwin11. PR boehm-gc/52179 * include/private/gcconfig.h (DARWIN): Define STACKBOTTOM with pthread_get_stackaddr_np when available. * configure.ac (THREADS): Check availability of pthread_get_stackaddr_np on *-*-darwin*. * configure: Regenerate.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #15 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 15:49:06 UTC --- I notice in boehm-gc/include/private/gcconfig.h we are already setting... # ifdef DARWIN # define OS_TYPE DARWIN # define DYNAMIC_LOADING # if defined(__ppc64__) # define ALIGNMENT 8 # define CPP_WORDSZ 64 # define STACKBOTTOM ((ptr_t) 0x7fff5fc0) # define CACHE_LINE_SIZE 64 # ifndef HBLKSIZE # define HBLKSIZE 4096 # endif # else # define ALIGNMENT 4 # define STACKBOTTOM ((ptr_t) 0xc000) # endif so I guess we just want to append #ifdef HAVE_PTHREAD_GET_STACKADDR_NP #define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self()) #endif at the end of those lines
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #17 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 18:24:16 UTC --- Created attachment 26737 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=26737 reduced patch
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #18 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 18:31:10 UTC --- (In reply to comment #16) The reduced patch properly adds the.. /* Define to 1 if you have the `pthread_get_stackaddr_np_np' function. */ #undef HAVE_PTHREAD_GET_STACKADDR_NP to boehm-gc/include/gc_config.h.in . Since the remaining changes to boehm-gc/include/private/gcconfig.h are # ifdef DARWIN and HAVE_PTHREAD_GET_STACKADDR_NP exists no where else, this should be sufficient. The patch elimintes the failures at -m32/-m64 on x86_64-apple-datrwin11 but boehm-gc.c/thread_leak_test.c execution test still hangs on occasion at -m64. This appears as... Leaked composite object at 0x10a908fe0 (/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120223/boehm-gc/testsuite/boehm-gc.c/thread_leak_test.c:12, sz=4, NORMAL) Leaked composite object at 0x10a908ec0 (/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120223/boehm-gc/testsuite/boehm-gc.c/thread_leak_test.c:12, sz=4, NORMAL) Leaked composite object at 0x10a908f20 (/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120223/boehm-gc/testsuite/boehm-gc.c/thread_leak_test.c:12, sz=4, NORMAL) Leaked composite object at start: 0x10a908f00, appr. length: 48
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #19 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 18:37:40 UTC --- (In reply to comment #13) I've not had time to investigate - but suspect it is related to operating close to stack limits -- if you try reducing the number of recursions (like PPC does) does this go away? This is a different test. On x86_64-apple-darwin11, it is thread_leak_test.c which fails the execution test, not gctest.c or leak_test.c. I'll try rebuilding gcc trunk with the reduced patch but without... r175182 | mrs | 2011-06-18 11:06:26 -0400 (Sat, 18 Jun 2011) | 4 lines PR target/49461 * libjava/configure.ac (SYSTEMSPEC): Pass -no_pie for darwin11. * libjava/configure: Regenerate. to see how the libjava tests behave now with -pie.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #20 from Mike Stump mikestump at comcast dot net 2012-02-23 18:45:28 UTC --- Where do you want the second change made? Let me repeat myself: the code is in boehm-gc/include/private/gcconfig.h, so the patch should change the ifdef DARWIN block there. In the code in the file I mentioned, as a replacement to the #define that exists today.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #21 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 18:50:21 UTC --- (In reply to comment #20) Where do you want the second change made? Let me repeat myself: the code is in boehm-gc/include/private/gcconfig.h, so the patch should change the ifdef DARWIN block there. In the code in the file I mentioned, as a replacement to the #define that exists today. Yes, See the reduced patch I posted in comment 17. Also, if thread_leak_test.c is twitchy with -pie at -m64, we could also open a PR for that and just skip this test on darwin11+ at -m64 for now. Assuming that my proposed reversion of r175182 causes no regressions in libjava on darwin11+.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #22 from Patrick Marlier patrick.marlier at gmail dot com 2012-02-23 18:52:56 UTC --- (In reply to comment #21) (In reply to comment #20) Where do you want the second change made? Let me repeat myself: the code is in boehm-gc/include/private/gcconfig.h, so the patch should change the ifdef DARWIN block there. In the code in the file I mentioned, as a replacement to the #define that exists today. Yes, See the reduced patch I posted in comment 17. Also, if thread_leak_test.c is twitchy with -pie at -m64, we could also open a PR for that and just skip this test on darwin11+ at -m64 for now. Assuming that my proposed reversion of r175182 causes no regressions in libjava on darwin11+. It seems there is already a PR for thread_leak_test.c failure: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48299 Patrick.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #23 from Mike Stump mikestump at comcast dot net 2012-02-23 18:56:31 UTC --- I think the patch in 17 is Ok.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #24 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 20:13:06 UTC --- Created attachment 26739 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=26739 fix both PR52179 and revert hack from PR49461 I propose the following patch which both fixes PR52179 and reverts r175182 since it is no longer need. This patch bootstraps on x86_64-apple-darwin11 and produces the expected darwin11 libjava results without passing -Wl,-no_pie to the linker in gcj on darwin11.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #25 from Mike Stump mikestump at comcast dot net 2012-02-23 21:53:04 UTC --- Ok.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #26 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 21:55:57 UTC --- Posted to gcc-patches as http://gcc.gnu.org/ml/gcc-patches/2012-02/msg01209.html.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179
Patrick Marlier patrick.marlier at gmail dot com changed:
What|Removed |Added
CC||patrick.marlier at gmail
||dot com
--- Comment #8 from Patrick Marlier patrick.marlier at gmail dot com
2012-02-22 22:30:52 UTC ---
As discussed in https://github.com/ivmai/bdwgc/issues/13, this was fixed in
boehm-gc but due to the stage 4, I don't expect to the boehm-gc version be
upgraded. Does a workaround should be proposed?
You can try that but 1) this is untested (and probably is not enough), 2)
NO_PTHREAD_GET_STACKADDR_NP macro does not exists in current boehm-gc so
probably it will create problems too.
Index: os_dep.c
===
--- os_dep.c(revision 184398)
+++ os_dep.c(working copy)
@@ -1011,6 +1011,14 @@ ptr_t GC_get_stack_base()
#if !defined(BEOS) !defined(AMIGA) !defined(MSWIN32) \
!defined(MSWINCE) !defined(OS2) !defined(NOSYS) !defined(ECOS)
+# if defined(DARWIN)
+/* We could use pthread_get_stackaddr_np even in case of a */
+/* single-threaded gclib (there is no -lpthread on Darwin). */
+# include pthread.h
+# undef STACKBOTTOM
+# define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self())
+# endif /* defined(DARWIN) */
+
ptr_t GC_get_stack_base()
{
# if defined(HEURISTIC1) || defined(HEURISTIC2) || \
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #9 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-23 02:42:47 UTC --- (In reply to comment #8) This change bootstraps fine with current gcc trunk on x86_64-apple-darwin11. It almost fixes the failures in the boehm-gc test suite. The -m32 results always pass as... === boehm-gc Summary for unix/-m32 === # of expected passes12 # of unsupported tests1 but often the -m64 results show the failure... WARNING: program timed out. FAIL: boehm-gc.c/thread_leak_test.c -O2 execution test Running /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120222/boehm-gc/testsuite/boehm-gc.lib/lib.exp ... === boehm-gc Summary for unix/-m64 === # of expected passes11 # of unexpected failures1 # of unsupported tests1 Are there any other darwin related changes upstream?
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #10 from Mike Stump mikestump at comcast dot net 2012-02-23 04:34:30 UTC --- The proposed patch is wrong, the code is in boehm-gc/include/private/gcconfig.h, so the patch should change the ifdef DARWIN block there. I don't know why they have NO_PTHREAD_GET_STACKADDR_NP, so, I can't guess why they have it, though, I would be interested in their experience with it. Anyway, propose a patch for gcconfig.h and I would likely approve it.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #11 from Mike Stump mikestump at comcast dot net 2012-02-23 04:56:55 UTC --- Ah, the better way to do that would be to have: AC_CHECK_FUNCS([pthread_get_stackaddr_np]) in configure.ac, and then just have #ifdef HAVE_PTHREAD_GET_STACKADDR_NP #define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self()) #endif This should cover all the issues with NO_PTHREAD...
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #7 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-11 01:10:48 UTC --- Interestingly, aslr randomizes the gdb crash log. For instance... # gdb ./gctest (gdb) break mark.c:361 Breakpoint 1 at 0x20c49ba5e20a81: file ../../../gcc-4.7-20120209/boehm-gc/mark.c, line 361. (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/gctest Reading symbols for shared libraries + done Reading symbols for shared libraries done Breakpoint 1, GC_mark_some (cold_gc_frame=0x7fff6624b64c \001) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:361 361MARK_FROM_MARK_STACK(); (gdb) c 106 Will ignore next 105 crossings of breakpoint 1. Continuing. Breakpoint 1, GC_mark_some (cold_gc_frame=0x7fff6624b64c \001) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:361 361MARK_FROM_MARK_STACK(); (gdb) break mark.c:759 Breakpoint 2 at 0x1066722ac: file ../../../gcc-4.7-20120209/boehm-gc/mark.c, line 759. (gdb) c 3000 Will ignore next 2999 crossings of breakpoint 1. Continuing. Breakpoint 2, GC_mark_from (mark_stack_top=0x106716000, mark_stack=0x106716000, mark_stack_limit=0x106726000) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) c 1000 Will ignore next 999 crossings of breakpoint 2. Continuing. Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x7fff662d03d8 GC_mark_from (mark_stack_top=0x106716000, mark_stack=0x106716000, mark_stack_limit=0x106726000) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:759 759 deferred = *limit; vs # gdb ./gctest GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as x86_64-apple-darwin...Reading symbols for shared libraries done (gdb) set disable-aslr off (gdb) break mark.c:361 Breakpoint 1 at 0x20c49ba5e20a81: file ../../../gcc-4.7-20120209/boehm-gc/mark.c, line 361. (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/gctest Reading symbols for shared libraries + done Reading symbols for shared libraries done Breakpoint 1, GC_mark_some (cold_gc_frame=0x7fff605eb64c \001) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:361 361MARK_FROM_MARK_STACK(); (gdb) c 106 Will ignore next 105 crossings of breakpoint 1. Continuing. Breakpoint 1, GC_mark_some (cold_gc_frame=0x7fff605eb64c \001) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:361 361MARK_FROM_MARK_STACK(); (gdb) break mark.c:759 Breakpoint 2 at 0x100a112ac: file ../../../gcc-4.7-20120209/boehm-gc/mark.c, line 759. (gdb) c 4000 Will ignore next 3999 crossings of breakpoint 1. Continuing. Breakpoint 2, GC_mark_from (mark_stack_top=0x100abb000, mark_stack=0x100abb000, mark_stack_limit=0x100acb000) at ../../../gcc-4.7-20120209/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) where the second attempt crosses the same number of breakpoints on mark.c:759 without crashing as in the first try.
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #6 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-09 15:05:50 UTC --- All of these crashes appear in the section in the GC_mark_from subroutine of mark.c commented as... /* Try to prefetch the next pointer to be examined asap.*/ /* Empirically, this also seems to help slightly without*/ /* prefetches, at least on linux/X86. Presumably this loop */ /* ends up with less register pressure, and gcc thus ends up*/ /* generating slightly better code. Overall gcc code quality */ /* for this loop is still not great.*/ GC_mark_from itself is commented as... /* * Mark objects pointed to by the regions described by * mark stack entries between GC_mark_stack and GC_mark_stack_top, * inclusive. Assumes the upper limit of a mark stack entry * is never 0. A mark stack entry never has size 0. * We try to traverse on the order of a hblk of memory before we return. * Caller is responsible for calling this until the mark stack is empty. * Note that this is the most performance critical routine in the * collector. Hence it contains all sorts of ugly hacks to speed * things up. In particular, we avoid procedure calls on the common * path, we take advantage of peculiarities of the mark descriptor * encoding, we optionally maintain a cache for the block address to * header mapping, we prefetch when an object is grayed, etc. */
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #1 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-08 23:55:26 UTC --- FYI, a description of the differences between aslr in Snow Leopard and Lion can be found at... http://www.0xcafebabe.it/2011/10/15/on-macos-10-7-dyld-randomization/
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #2 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-09 00:34:19 UTC --- Rebuilding x86_64-apple-darwin11.3.0/boehm-gc with -g -O0 -DDARWIN_DEBUG and the failing gctest at -m64 with the same allows the following backtrace to be obtained with aslr active under Lion... # gdb ./gctest GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as x86_64-apple-darwin...Reading symbols for shared libraries done (gdb) set disable-aslr off (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/gctest Reading symbols for shared libraries + done Reading symbols for shared libraries done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x7fff690f63d8 GC_mark_from (mark_stack_top=0x10953f000, mark_stack=0x10953f000, mark_stack_limit=0x10954f000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) bt #0 GC_mark_from (mark_stack_top=0x10953f000, mark_stack=0x10953f000, mark_stack_limit=0x10954f000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 #1 0x000109498947 in GC_mark_some (cold_gc_frame=0x7fff6907164c \001) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:361 #2 0x0001094906ae in GC_stopped_mark (stop_func=0x10948fb88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:531 #3 0x00010949026a in GC_try_to_collect_inner (stop_func=0x10948fb88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:378 #4 0x00010949c222 in GC_init_inner () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:789 #5 0x00010949bdbd in GC_init () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:493 #6 0x0001094758ec in main () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.c/gctest.c:1803 (gdb)
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #3 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-09 00:40:19 UTC --- A backtrace for the failing leak_test at -m64 looks identical... # gdb ./leak_testGNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011)Copyright 2004 Free Software Foundation, Inc.GDB is free software, covered by the GNU General Public License, and you arewelcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as x86_64-apple-darwin...Reading symbols for shared libraries done (gdb) set disable-aslr off (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/leak_test Reading symbols for shared libraries + done Reading symbols for shared libraries done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x7fff629012c8 GC_mark_from (mark_stack_top=0x102d33000, mark_stack=0x102d33000, mark_stack_limit=0x102d43000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) bt #0 GC_mark_from (mark_stack_top=0x102d33000, mark_stack=0x102d33000, mark_stack_limit=0x102d43000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 #1 0x000102c8b947 in GC_mark_some (cold_gc_frame=0x7fff6287c53c \001) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:361 #2 0x000102c836ae in GC_stopped_mark (stop_func=0x102c82b88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:531 #3 0x000102c8326a in GC_try_to_collect_inner (stop_func=0x102c82b88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:378 #4 0x000102c8f222 in GC_init_inner () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:789 #5 0x000102c89dda in GC_generic_malloc_inner (lb=43, k=1) at ../../../gcc-4.7-20120207/boehm-gc/malloc.c:123 #6 0x000102c89f74 in GC_generic_malloc (lb=43, k=1) at ../../../gcc-4.7-20120207/boehm-gc/malloc.c:192 #7 0x000102c8a2a1 in GC_malloc (lb=43) at ../../../gcc-4.7-20120207/boehm-gc/malloc.c:297 #8 0x000102c854e4 in GC_debug_malloc (lb=4, s=0x102c7df50 /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.c/leak_test.c, i=9) at ../../../gcc-4.7-20120207/boehm-gc/dbg_mlc.c:491 #9 0x000102c7de6f in main () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.c/leak_test.c:9 (gdb)
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #4 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-09 00:46:21 UTC --- Backtrace for thread_leak_test at -m64 # gdb ./thread_leak_testGNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011)Copyright 2004 Free Software Foundation, Inc.GDB is free software, covered by the GNU General Public License, and you arewelcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as x86_64-apple-darwin...Reading symbols for shared libraries done (gdb) set disable-aslr off (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/thread_leak_test Reading symbols for shared libraries + done Reading symbols for shared libraries done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x7fff650f1368 GC_mark_from (mark_stack_top=0x105522000, mark_stack=0x105522000, mark_stack_limit=0x105532000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) bt #0 GC_mark_from (mark_stack_top=0x105522000, mark_stack=0x105522000, mark_stack_limit=0x105532000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 #1 0x00010547c947 in GC_mark_some (cold_gc_frame=0x7fff6506c5dc \001) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:361 #2 0x0001054746ae in GC_stopped_mark (stop_func=0x105473b88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:531 #3 0x00010547426a in GC_try_to_collect_inner (stop_func=0x105473b88 GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:378 #4 0x000105480222 in GC_init_inner () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:789 #5 0x00010547adda in GC_generic_malloc_inner (lb=144, k=1) at ../../../gcc-4.7-20120207/boehm-gc/malloc.c:123 #6 0x000105486d39 in GC_pthread_create (new_thread=0x7fff6506c740, attr=0x0, start_routine=0x10546dd18 test, arg=0x0) at ../../../gcc-4.7-20120207/boehm-gc/pthread_support.c:1330 #7 0x00010546ddd6 in main () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.c/thread_leak_test.c:28 (gdb)
[Bug boehm-gc/52179] boehm-gc incompatible with aslr on darwin11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179 --- Comment #5 from Jack Howarth howarth at nitro dot med.uc.edu 2012-02-09 00:56:13 UTC --- Backtrace for staticrootstest at -m64... # gdb ./staticrootstestGNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011)Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as x86_64-apple-darwin...Reading symbols for shared libraries . done (gdb) set disable-aslr off (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.3.0/boehm-gc/testsuite/.libs/staticrootstest Reading symbols for shared libraries + done Reading symbols for shared libraries + done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x7fff6fbb0020 GC_mark_from (mark_stack_top=0x110037000, mark_stack=0x110037000, mark_stack_limit=0x110047000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 759 deferred = *limit; (gdb) bt #0 GC_mark_from (mark_stack_top=0x110037000, mark_stack=0x110037000, mark_stack_limit=0x110047000) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:759 #1 0x00010ff9081f in GC_mark_some (cold_gc_frame=0x7fff6fb2b68c \001) at ../../../gcc-4.7-20120207/boehm-gc/mark.c:361 #2 0x00010ff88583 in GC_stopped_mark (stop_func=0x10ff87a5d GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:531 #3 0x00010ff8813f in GC_try_to_collect_inner (stop_func=0x10ff87a5d GC_never_stop_func) at ../../../gcc-4.7-20120207/boehm-gc/alloc.c:378 #4 0x00010ff940fa in GC_init_inner () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:789 #5 0x00010ff93c95 in GC_init () at ../../../gcc-4.7-20120207/boehm-gc/misc.c:493 #6 0x00010ff8621e in libsrl_init () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.lib/staticrootslib.c:26 #7 0x00010ff2ce59 in main () at /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20120207/boehm-gc/testsuite/boehm-gc.lib/staticrootstest.c:26 (gdb)
