ruby-dev

以下のようにすると Invalid read of size 4 となります。

% valgrind ./ruby -ve 'set_trace_func(proc {})'
==13641== Memcheck, a memory error detector.
==13641== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al.
==13641== Using LibVEX rev 1658, a library for dynamic binary translation.
==13641== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP.
==13641== Using valgrind-3.2.1-Debian, a dynamic binary instrumentation framework.
==13641== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al.
==13641== For more details, rerun with: -v
==13641== 
--13641-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--13641-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--13641-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--13641-- DWARF2 CFI reader: unhandled CFI instruction 0:50
ruby 1.9.0 (2007-09-22 patchlevel 0) [i686-linux]
==13641== Invalid read of size 4
==13641==    at 0x80FB8B9: remove_event_hook (thread.c:2709)
==13641==    by 0x80FB92E: rb_remove_event_hook (thread.c:2727)
==13641==    by 0x80FB9B0: rb_clear_trace_func (thread.c:2749)
==13641==    by 0x805A1AB: ruby_finalize_1 (eval.c:146)
==13641==    by 0x805A297: ruby_cleanup (eval.c:181)
==13641==    by 0x805A507: ruby_run_node (eval.c:256)
==13641==    by 0x80576C4: main (main.c:46)
==13641==  Address 0x42FDEDC is 12 bytes inside a block of size 16 free'd
==13641==    at 0x401CFA5: free (vg_replace_malloc.c:233)
==13641==    by 0x8060FCF: ruby_xfree (gc.c:328)
==13641==    by 0x80FB8AF: remove_event_hook (thread.c:2706)
==13641==    by 0x80FB92E: rb_remove_event_hook (thread.c:2727)
==13641==    by 0x80FB9B0: rb_clear_trace_func (thread.c:2749)
==13641==    by 0x805A1AB: ruby_finalize_1 (eval.c:146)
==13641==    by 0x805A297: ruby_cleanup (eval.c:181)
==13641==    by 0x805A507: ruby_run_node (eval.c:256)
==13641==    by 0x80576C4: main (main.c:46)
==13641== 
==13641== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 19 from 1)
==13641== malloc/free: in use at exit: 914,049 bytes in 6,533 blocks.
==13641== malloc/free: 6,939 allocs, 406 frees, 937,224 bytes allocated.
==13641== For counts of detected errors, rerun with: -v
==13641== searching for pointers to 6,533 not-freed blocks.
==13641== checked 697,756 bytes.
==13641== 
==13641== LEAK SUMMARY:
==13641==    definitely lost: 0 bytes in 0 blocks.
==13641==      possibly lost: 68 bytes in 1 blocks.
==13641==    still reachable: 913,981 bytes in 6,532 blocks.
==13641==         suppressed: 0 bytes in 0 blocks.
==13641== Reachable blocks (those to which a pointer was found) are not shown.
==13641== To see them, rerun with: --show-reachable=yes
-- 
[田中 哲][たなか あきら][Tanaka Akira]

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[ruby-dev:31820] valgrind set_trace_func

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