277045 2011-07-04 07:23:41 +0000 Valgrind crashes with unhandled DW_OP_ opcode 0x2a in gcc (Debian 4.6.1-1) 4.6.1 with debian unstable x64 2011-07-21 15:12:20 +0000 1 1 6 Developer tools valgrind memcheck 3.7 SVN Unlisted Binaries Linux RESOLVED FIXED NOR crash --- 0 dimitris.zenios jseward kde tom 20 oldest_to_newest 1138093 0 dimitris.zenios 2011-07-04 07:23:41 +0000 Version: 3.7 SVN OS: Linux ==8348== Memcheck, a memory error detector ==8348== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==8348== Using Valgrind-3.7.0.SVN and LibVEX; rerun with -h for copyright info ==8348== Command: ./testesassad ==8348== --8348-- Warning: DWARF2 CFI reader: unhandled DW_OP_ opcode 0x2a valgrind: m_debuginfo/readdwarf.c:2397 (copy_convert_CfiExpr_tree): Assertion 'srcix >= 0 && srcix < VG_(sizeXA)(srcxa)' failed. ==8348== at 0x3802CFC6: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) sched status: running_tid=0 Reproducible: Always Steps to Reproduce: Just run any program. Expected Results: the program should run 1138241 1 kde 2011-07-04 17:09:13 +0000 I am having exactly the same problem after just having upgraded to the new Debian version of valgrind. It seems to happen for all programs as well: derick@whisky:~/dev/Twig$ valgrind /bin/ls ==6707== Memcheck, a memory error detector ==6707== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==6707== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==6707== Command: /bin/ls ==6707== --6707-- Warning: DWARF2 CFI reader: unhandled DW_OP_ opcode 0x2a valgrind: m_debuginfo/readdwarf.c:2338 (copy_convert_CfiExpr_tree): Assertion 'srcix >= 0 && srcix < VG_(sizeXA)(srcxa)' failed. ==6707== at 0x3802CFF6: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 1138251 2 kde 2011-07-04 17:44:17 +0000 I've also added a Debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632666 1138282 3 61606 tom 2011-07-04 19:25:08 +0000 Created attachment 61606 Implement DW_OP_ge and friends I don't know if it will fix the assertion or not, but this patch should implement the missing opcode (which is DW_OP_ge). 1138401 4 kde 2011-07-05 08:44:36 +0000 This patch indeed fixes the original error, but I am now getting a new one: derick@whisky:~$ /home/derick/local/bin/valgrind /bin/ls ==22174== Memcheck, a memory error detector ==22174== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==22174== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==22174== Command: /bin/ls ==22174== --22174-- Warning: DWARF2 CFI reader: unhandled DW_OP_ opcode 0x24 valgrind: m_debuginfo/readdwarf.c:2338 (copy_convert_CfiExpr_tree): Assertion 'srcix >= 0 && srcix < VG_(sizeXA)(srcxa)' failed. ==22174== at 0x3804AE36: report_and_quit (m_libcassert.c:193) 1138412 5 61618 tom 2011-07-05 09:14:54 +0000 Created attachment 61618 Implement DWARF comparison and shift operators Derick sent me the failing object, which was actually one of valgrind's preload libraries in his newly built patched version. It was built with gcc 4.6.1 and the problem seems to be the default CFA expression in one of the FDEs which looks like: DW_OP_breg7 (rsp): 8 DW_OP_breg16 (rip): 0; DW_OP_lit15 DW_OP_and DW_OP_lit11 DW_OP_ge DW_OP_lit3 DW_OP_shl DW_OP_plus Which decodes as: if %rip & 0xf >= 11 cfa = %rsp + 8 else cfa = %rsp Which is quite funky but anyway the good news it that it looks like DW_OP_shl is the only other thing we need so this new patch adds that (and DW_OP_shr for good measure). I've also fixed the relational ops, which I had back to front due to the DWARF 2 standard being unclear - it has been clarified in the DWARF 3 spec. Still no idea if it will fix the assertion of course... 1138421 6 tom 2011-07-05 09:28:14 +0000 Derick has confirmed the patch fixes the problem so I have committed it as r11856. 1138423 7 kde 2011-07-05 09:29:11 +0000 I can confirm that this new patches fixes valgrind for me \o/. 1144174 8 62050 jakub 2011-07-21 14:56:54 +0000 Created attachment 62050 valgrind-relational.patch Unfortunately this isn't correct, DW_OP_{ge,gt,le,lt} as per DWARF{2,3,4} perform signed comparisons instead of unsigned. In the case of the PLT unwind info that triggered this (see http://sources.redhat.com/ml/binutils/2011-06/msg00225.html ) it doesn't matter as the value is masked and so is always non-negative (and the second operand is constant), but it could matter elsewhere. BTW, it is strange that shr operation has been added and shra has not (arithmetic right shift). 1144176 9 tom 2011-07-21 15:09:22 +0000 It's not really strange when you consider that shr is dead easy to implement in C and shra is much harder ;-) 1144178 10 tom 2011-07-21 15:12:20 +0000 Patch committed as r11904. 61606 2011-07-04 19:25:08 +0000 2011-07-05 09:14:54 +0000 Implement DW_OP_ge and friends valgrind-opge.patch text/plain 2988 tom SW5kZXg6IGNvcmVncmluZC9tX2RlYnVnaW5mby9yZWFkZHdhcmYuYwo9PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBj b3JlZ3JpbmQvbV9kZWJ1Z2luZm8vcmVhZGR3YXJmLmMJKHJldmlzaW9uIDExODUyKQorKysgY29y ZWdyaW5kL21fZGVidWdpbmZvL3JlYWRkd2FyZi5jCSh3b3JraW5nIGNvcHkpCkBAIC0yOTA3LDYg KzI5MDcsMjYgQEAKICAgICAgICAgICAgICAgIFZHXyhwcmludGYpKCJEV19PUF8lcyIsIG9wbmFt ZSk7CiAgICAgICAgICAgICBicmVhazsKIAorICAgICAgICAgY2FzZSBEV19PUF9lcToKKyAgICAg ICAgICAgIG9wID0gQ29wX0VxOyBvcG5hbWUgPSAiZXEiOyBnb3RvIHJlbG9wOworICAgICAgICAg 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