valgrind defekt

[attuska]

synaptic debug...

UBK2/64

attila@attila-pc:$ valgrind synaptic
==1164== Memcheck, a memory error detector
==1164== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==1164== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==1164== Command: synaptic
==1164==
attila@attila-pc:$

UBK3/64

attila@attila-pc:~$ valgrind synaptic
==1018== Memcheck, a memory error detector
==1018== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==1018== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==1018== Command: synaptic
==1018==

valgrind: Fatal error at startup: a function redirection
valgrind: which is mandatory for this platform-tool combination
valgrind: cannot be set up. Details of the redirection are:
valgrind:
valgrind: A must-be-redirected function
valgrind: whose name matches the pattern: strlen
valgrind: in an object with soname matching: ld-linux-x86-64.so.2
valgrind: was not found whilst processing
valgrind: symbols from the object with soname: ld-linux-x86-64.so.2
valgrind:
valgrind: Possible fixes: (1, short term): install glibc's debuginfo
valgrind: package on this machine. (2, longer term): ask the packagers
valgrind: for your Linux distribution to please in future ship a non-
valgrind: stripped ld.so (or whatever the dynamic linker .so is called)
valgrind: that exports the above-named function using the standard
valgrind: calling conventions for this platform. The package you need
valgrind: to install for fix (1) is called
valgrind:
valgrind: On Debian, Ubuntu: libc6-dbg
valgrind: On SuSE, openSuSE, Fedora, RHEL: glibc-debuginfo
valgrind:
valgrind: Note that if you are debugging a 32 bit process on a
valgrind: 64 bit system, you will need a corresponding 32 bit debuginfo
valgrind: package (e.g. libc6-dbg:i386).
valgrind:
valgrind: Cannot continue -- exiting now. Sorry.

attila@attila-pc:~$

[attuska]

Ez glibc hiba lehet, valószínűleg a synaptic esete is ilyesmi lehet.

UBK3

A /lib64 egy szimlink a /lib mappára
lib64 -> lib

UBK2

A /lib64 egy valós mappa, benne két szimlink van.
ld-linux-x86-64.so.2 -> ../lib/ld-linux-x86-64.so.2
ld-lsb-x86-64.so.3 -> ../lib/d-linux-x86-64.so.2

A /lib mappában
ld-linux-x86-64.so.2 -> ld-2.26.so

UBK3 -on ld-lsb-x86-64.so.3 szimlink nincs, ezt létrehozva semmi változás.

[rezso]

A fullrebuild vége előtt tök felesleges ilyeneken rugózni. Ugyanez a synaptic esetében is.

[attuska]

A fullrebuild nem oldotta meg. Ugyanez a synaptic esetében is.

[attuska]

A glibc-ben UBK2 és UBK3 közt egy nagy különbség van.

UBK3:
ld-2.26.so: ELF 64-bit LSB pie executable x86-64, version 1 (SYSV), dynamically linked, stripped

UBK2:
ld-2.26.so: ELF 64-bit LSB pie executable x86-64, version 1 (SYSV), dynamically linked, not stripped

[attuska]

És igen! Nem szabad strippelni!
A glibc verziója UBK2 és UBK3 esetén azonos.
A régebbi, full rebuild előtti UBK3 telepítményre másolva az UBK2/64 "not stripped" ld-2.26.so fájlját, fut a valgrind!

attila@attila-pc:$ valgrind synaptic
==936== Memcheck, a memory error detector
==936== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==936== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==936== Command: synaptic
==936==
*** Error in `synaptic': double free or corruption (fasttop): 0x00000000022340e0 ***
attila@attila-pc:$

Ez a valgrind gondot ugyan megoldja majd, de a synaptic ettől még vacak.

[attuska]

Feltelepítve a nem strippelt glibc csomagot (options fájl: skip-strip) működik.
A synaptic nem.

[attuska]

Full-rebuild (újabb glibc) megoldotta.