ruby-dev

以下のようにすると valgrind で
Invalid read of size 4 や
Invalid write of size 4 が出ます

% valgrind ./ruby -ve '
big_neg = 0x40000000.coerce(-1)[0]
big_zero = 0x40000000.coerce(0)[0]
p big_zero % big_neg
p ~big_zero'
==8288== Memcheck, a memory error detector.
==8288== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al.
==8288== Using LibVEX rev 1658, a library for dynamic binary translation.
==8288== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP.
==8288== Using valgrind-3.2.1-Debian, a dynamic binary instrumentation framework.
==8288== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al.
==8288== For more details, rerun with: -v
==8288== 
--8288-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--8288-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--8288-- DWARF2 CFI reader: unhandled CFI instruction 0:50
--8288-- DWARF2 CFI reader: unhandled CFI instruction 0:50
ruby 1.9.0 (2007-07-14 patchlevel 0) [i686-linux]
0
==8288== Invalid read of size 4
==8288==    at 0x80E5A98: get2comp (bignum.c:76)
==8288==    by 0x80E77BE: rb_big_neg (bignum.c:1043)
==8288==    by 0x80D9858: vm_call_method (insnhelper.ci:351)
==8288==    by 0x80D4F7D: vm_eval (insns.def:1171)
==8288==    by 0x80D86E3: vm_eval_body (vm.c:1165)
==8288==    by 0x80D8A1A: rb_iseq_eval (vm.c:1374)
==8288==    by 0x80590C8: ruby_exec_node (eval.c:226)
==8288==    by 0x805D63C: ruby_run_node (eval.c:251)
==8288==    by 0x8056C95: main (main.c:46)
==8288==  Address 0x42FB4A0 is 0 bytes inside a block of size 1 alloc'd
==8288==    at 0x401D38B: malloc (vg_replace_malloc.c:149)
==8288==    by 0x8062B79: ruby_xmalloc (gc.c:250)
==8288==    by 0x80E5B8C: bignew_1 (bignum.c:49)
==8288==    by 0x80E6772: rb_big_clone (bignum.c:59)
==8288==    by 0x80E7782: rb_big_neg (bignum.c:1032)
==8288==    by 0x80D9858: vm_call_method (insnhelper.ci:351)
==8288==    by 0x80D4F7D: vm_eval (insns.def:1171)
==8288==    by 0x80D86E3: vm_eval_body (vm.c:1165)
==8288==    by 0x80D8A1A: rb_iseq_eval (vm.c:1374)
==8288==    by 0x80590C8: ruby_exec_node (eval.c:226)
==8288==    by 0x805D63C: ruby_run_node (eval.c:251)
==8288==    by 0x8056C95: main (main.c:46)
==8288== 
==8288== Invalid write of size 4
==8288==    at 0x80E5AA2: get2comp (bignum.c:77)
==8288==    by 0x80E77BE: rb_big_neg (bignum.c:1043)
==8288==    by 0x80D9858: vm_call_method (insnhelper.ci:351)
==8288==    by 0x80D4F7D: vm_eval (insns.def:1171)
==8288==    by 0x80D86E3: vm_eval_body (vm.c:1165)
==8288==    by 0x80D8A1A: rb_iseq_eval (vm.c:1374)
==8288==    by 0x80590C8: ruby_exec_node (eval.c:226)
==8288==    by 0x805D63C: ruby_run_node (eval.c:251)
==8288==    by 0x8056C95: main (main.c:46)
==8288==  Address 0x42FB4A0 is 0 bytes inside a block of size 1 alloc'd
==8288==    at 0x401D38B: malloc (vg_replace_malloc.c:149)
==8288==    by 0x8062B79: ruby_xmalloc (gc.c:250)
==8288==    by 0x80E5B8C: bignew_1 (bignum.c:49)
==8288==    by 0x80E6772: rb_big_clone (bignum.c:59)
==8288==    by 0x80E7782: rb_big_neg (bignum.c:1032)
==8288==    by 0x80D9858: vm_call_method (insnhelper.ci:351)
==8288==    by 0x80D4F7D: vm_eval (insns.def:1171)
==8288==    by 0x80D86E3: vm_eval_body (vm.c:1165)
==8288==    by 0x80D8A1A: rb_iseq_eval (vm.c:1374)
==8288==    by 0x80590C8: ruby_exec_node (eval.c:226)
==8288==    by 0x805D63C: ruby_run_node (eval.c:251)
==8288==    by 0x8056C95: main (main.c:46)
==8288== 
==8288== Conditional jump or move depends on uninitialised value(s)
==8288==    at 0x80E5AB9: get2comp (bignum.c:80)
==8288==    by 0x80E77BE: rb_big_neg (bignum.c:1043)
==8288==    by 0x80D9858: vm_call_method (insnhelper.ci:351)
==8288==    by 0x80D4F7D: vm_eval (insns.def:1171)
==8288==    by 0x80D86E3: vm_eval_body (vm.c:1165)
==8288==    by 0x80D8A1A: rb_iseq_eval (vm.c:1374)
==8288==    by 0x80590C8: ruby_exec_node (eval.c:226)
==8288==    by 0x805D63C: ruby_run_node (eval.c:251)
==8288==    by 0x8056C95: main (main.c:46)
0
==8288== 
==8288== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 19 from 1)
==8288== malloc/free: in use at exit: 881,852 bytes in 7,038 blocks.
==8288== malloc/free: 7,139 allocs, 101 frees, 898,767 bytes allocated.
==8288== For counts of detected errors, rerun with: -v
==8288== searching for pointers to 7,038 not-freed blocks.
==8288== checked 650,504 bytes.
==8288== 
==8288== LEAK SUMMARY:
==8288==    definitely lost: 0 bytes in 0 blocks.
==8288==      possibly lost: 68 bytes in 1 blocks.
==8288==    still reachable: 881,784 bytes in 7,037 blocks.
==8288==         suppressed: 0 bytes in 0 blocks.
==8288== Reachable blocks (those to which a pointer was found) are not shown.
==8288== To see them, rerun with: --show-reachable=yes
-- 
[田中 哲][たなか あきら][Tanaka Akira]

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[#31104] v0,(*,v1,) = 0 dumps core — Tanaka Akira <akr@...>

[#31107] *v1,(*) = 0: Stack consistency error — Tanaka Akira <akr@...>

[#31109] assignment syntax — Tanaka Akira <akr@...>

[#31110] ary[]+=1 dumps core — "Yusuke ENDOH" <mame@...>

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[#31119] loop{x+=1&&next} dumps core — "Yusuke ENDOH" <mame@...>

[#31132] (v,) = [[]] — Tanaka Akira <akr@...>

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[#31138] nil.to_splat — Tanaka Akira <akr@...>

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[#31141] SEGV by m {|(*,v)|} — Tanaka Akira <akr@...>

[#31142] yield :k=>:v, *[] — Tanaka Akira <akr@...>

[#31143] m {|(*,(*)),|} — Tanaka Akira <akr@...>

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[#31147] Proc from yield — Tanaka Akira <akr@...>

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[#31149] net/http: path.empty? was removed when path is nil — "NARUSE, Yui" <naruse@...>

[#31151] trunk: rdoc: format.rb 処理中に Bus error — pegacorn <subscriber.jp@...>

[#31153] syntax error: m {|(*,a,b)|} — Tanaka Akira <akr@...>

[#31160] Stack consistency error: m {|(v,(*))|} — Tanaka Akira <akr@...>

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[#31214] Warning: OpenSSL::PKCS7::PKCS7 is deprecated after Ruby 1.9; use OpenSSL::PKCS7 instead — Kazuhiro NISHIYAMA <zn@...>

[#31215] 65538 ** 2 — Tanaka Akira <akr@...>

[#31216] 1.8 floating point exception: 0 ** 2 — Tanaka Akira <akr@...>

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[#31221] Base64.b64encode len bug — "Kazuhiro NISHIYAMA" <zn@...>

[#31222] trunk: バグを指摘している警告 — pegacorn <subscriber.jp@...>

[#31225] Invalid read/write by ~big_zero. — Tanaka Akira <akr@...>

[#31229] ~big_zero after big_zero % big_neg — Tanaka Akira <akr@...>

[#31236] rb_big_pow — Tanaka Akira <akr@...>

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[#31243] ruby -ne ! dumps core — "Yusuke ENDOH" <mame@...>

[#31244] shift — Tanaka Akira <akr@...>

[#31252] [()] dumps core — "Yusuke ENDOH" <mame@...>

[#31253] [PATCH] Problem with ruby 1.8.6-p36 (and p39) on Tiger — "Vincent Isambart" <vincent.isambart@...>

[#31261] [ruby-bugs-12398] Redefining Exception#backtrace and unhandled exception bug — Nobuyoshi Nakada <nobu@...>

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[#31271] (1 << 0x40000000)[0x40000000] — Tanaka Akira <akr@...>

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[#31292] ParseDate.parsedate("Tuesday, July 6th, 2007, 18:35:20 UTC") — Tanaka Akira <akr@...>

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[#31318] URI and RFC 3986 (Re: URI::merge bug?) — Nobuyoshi Nakada <nobu@...>

[#31319] DelegatorおよびWeakRefのメモリ使用量 — "GO Noguchi" <gonoguti@...>

[ruby-dev:31225] Invalid read/write by ~big_zero.

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[#31107] v1,() = 0: Stack consistency error — Tanaka Akira <akr@...>

[#31136] a = nil — Tanaka Akira <akr@...>

[#31143] m {|(,()),|} — Tanaka Akira <akr@...>