memory checker?

[Johannes Berg <johannes@sipsolutions.net>]

Hi,

Does anyone know of a tool to check memory like memcheck86 does?

The reason I'm asking is that suddenly apt-cache once a while segfaults
out of the blue and I am getting weird spike noises when I'm playing
music. Maybe there's something else behind this, but I'd like to check
the memory.

johannes

For the interested, here's an apt-cache backtrace:
Starting program: /usr/bin/apt-cache search junk

Program received signal SIGSEGV, Segmentation fault.
0x100099a4 in Search (CmdL=@0x7ffff520) at cacheiterators.h:111
111        inline bool end() const {return Ver == Owner->VerP?true:false;};
(gdb) bt full
#0  0x100099a4 in Search (CmdL=@0x7ffff520) at cacheiterators.h:111
        I = 1
        V = {Ver = 0x425e7414, Owner = 0xc45da}
        Cache = (class pkgCache &) @0x7ffff880: {_vptr.pkgCache = 0x1001fbe8, CacheFile = {static npos = 4294967295,
    _M_dataplus = {<std::allocator<char>> = {<No data fields>}, _M_p = 0x1001fc4c ""}, static _S_empty_rep_storage = {0, 0, 0, 0}},
  Map = @0x10038a98, HeaderP = 0x30186008, PkgP = 0x30186008, VerFileP = 0x30186008, PkgFileP = 0x30186008, VerP = 0x30186008,
  ProvideP = 0x30186008, DepP = 0x30186008, StringItemP = 0x30186008, StrP = 0x30186008 "\230.v.", VS = 0xffee298}
        ShowFull = false
        NamesOnly = false
        NumPatterns = 1
        Plcy = <incomplete type>
        Patterns = (regex_t *) 0x10038a08
        Recs = {Cache = @0x7ffff880, Files = 0x1003b4c0}
        VFList = (ExVerFile *) 0x30d87008
#1  0x0ff795dc in CommandLine::DispatchArg (this=0x7ffff880, Map=0x1, NoMatch=false) at contrib/cmndline.cc:340
        Res = 16
        I = 2147480848
#2  0x0ff795dc in CommandLine::DispatchArg (this=0x7ffff880, Map=0x1, NoMatch=false) at contrib/cmndline.cc:340
        Res = 16
        I = 2147480848
#3  0x0ff795dc in CommandLine::DispatchArg (this=0x7ffff880, Map=0x1, NoMatch=false) at contrib/cmndline.cc:340
        Res = 16
        I = 2147480848
#4  0x0ff795dc in CommandLine::DispatchArg (this=0x7ffff880, Map=0x1, NoMatch=false) at contrib/cmndline.cc:340
        Res = 16
        I = 2147480848

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