Hmm...I think there's a difference in the environment.
For me:About This Mac > More Info... > System Report... > Software > Developer:
Version: 3.2 (10M2518) Location: /Developer Applications:
Xcode: 3.2.6 (1761) Interface Builder: 3.2.6 (851) Instruments:
2.7 (3017) Dashcode: 3.0.2 (333) SDKs: Mac OS X: 10.5: (9L31a)
10.6: (10M2518)
and for you memcpy is redirected differently:> --24112-- REDIR: 0x10015bcbd
(memcpy$VARIANT$sse42) redirected to 0x100010ed0 (memmove$VARIANT$sse42)
In any case... pardon my questions... I'm still a newbie in this.But can you
please explain the discussions between you and Pat? In particular...- Why would
memcpy need to read 8 bytes more?- And why would the warning depend on the
destination? That is, why am I getting this only in the 2nd iteration and not
any other time?
Thanks.- Tan
> Date: Sun, 8 Jul 2012 16:52:57 -0700
> From: [email protected]
> To: [email protected]
> Subject: Re: [Valgrind-users] Strange warning for invalid read of size 8 in
> memcpy
>
> > But, I still get the warning even with --partial-loads-ok=yes. Why so?
>
> I cannot reproduce that (in particular, I get no complaint from memcheck)
> with a freshly-built valgrind-3.7.0 in the environment:
> Darwin host.local 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr 9 19:32:15
> PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64 x86_64
> i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5646)
> About This Mac > More Info... > System Report... > Software > Developer
> 3.2 (10A432) /Developer
> 4.3.2 (4E2002) /Applications/Xcode.app
> ln -s /Developer/SDKs/MacOSX10.6.sdk/usr/include /usr/include
> CC='gcc -L/Developer/SDKs/MacOSX10.6.sdk/usr/lib'
>
> $ valgrind -v ./check ## note no '--partial-loads-ok=yes'
> ==24112== Memcheck, a memory error detector
> ==24112== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
> ==24112== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
> ==24112== Command: ./check
> ==24112==
> --24112-- Valgrind options:
> --24112-- -v
> --24112-- Contents of /proc/version:
> --24112-- can't open /proc/version
> --24112-- Arch and hwcaps: AMD64, amd64-sse3-cx16
> --24112-- Page sizes: currently 4096, max supported 4096
> --24112-- Valgrind library directory: /Users/jreiser/local/lib/valgrind
> --24112-- ./check (0x100000000)
> --24112-- reading syms from primary file (7 20)
> --24112-- dSYM directory is missing; consider using --dsymutil=yes
> --24112-- /usr/lib/dyld (0x7fff5fc00000)
> --24112-- reading syms from primary file (6 1179)
> --24112-- Reading suppressions file:
> /Users/jreiser/local/lib/valgrind/default.supp
> ==24112== embedded gdbserver: reading from
> /var/folders/0y/vg59c4zd2p593j05mr_dcqch0000gn/T//vgdb-pipe-from-vgdb-to-24112-by-jreiser-on-???
> ==24112== embedded gdbserver: writing to
> /var/folders/0y/vg59c4zd2p593j05mr_dcqch0000gn/T//vgdb-pipe-to-vgdb-from-24112-by-jreiser-on-???
> ==24112== embedded gdbserver: shared mem
> /var/folders/0y/vg59c4zd2p593j05mr_dcqch0000gn/T//vgdb-pipe-shared-mem-vgdb-24112-by-jreiser-on-???
> ==24112==
> ==24112== TO CONTROL THIS PROCESS USING vgdb (which you probably
> ==24112== don't want to do, unless you know exactly what you're doing,
> ==24112== or are doing some strange experiment):
> ==24112== /Users/jreiser/local/lib/valgrind/../../bin/vgdb --pid=24112
> ...command...
> ==24112==
> ==24112== TO DEBUG THIS PROCESS USING GDB: start GDB like this
> ==24112== /path/to/gdb ./check
> ==24112== and then give GDB the following command
> ==24112== target remote | /Users/jreiser/local/lib/valgrind/../../bin/vgdb
> --pid=24112
> ==24112== --pid is optional if only one valgrind process is running
> ==24112==
> --24112-- REDIR: 0x7fff5fc1dfc0 (strcmp) redirected to 0x13804cba0 (???)
> --24112-- REDIR: 0x7fff5fc1b161 (arc4random) redirected to 0x13804cc3e (???)
> --24112-- REDIR: 0x7fff5fc20a50 (strlen) redirected to 0x13804cb6f (???)
> --24112-- REDIR: 0x7fff5fc1c850 (strcpy) redirected to 0x13804cbbc (???)
> --24112-- REDIR: 0x7fff5fc19f17 (strcat) redirected to 0x13804cb80 (???)
> --24112-- /Users/jreiser/local/lib/valgrind/vgpreload_core-amd64-darwin.so
> (0x100004000)
> --24112-- reading syms from primary file (3 135)
> --24112-- dSYM=
> /Users/jreiser/local/lib/valgrind/vgpreload_core-amd64-darwin.so.dSYM/Contents/Resources/DWARF/vgpreload_core-amd64-darwin.so
> --24112-- reading dwarf3 from dsyms file
> --24112--
> /Users/jreiser/local/lib/valgrind/vgpreload_memcheck-amd64-darwin.so
> (0x10000f000)
> --24112-- reading syms from primary file (32 273)
> --24112-- dSYM=
> /Users/jreiser/local/lib/valgrind/vgpreload_memcheck-amd64-darwin.so.dSYM/Contents/Resources/DWARF/vgpreload_memcheck-amd64-darwin.so
> --24112-- reading dwarf3 from dsyms file
> --24112-- /usr/lib/libSystem.B.dylib (0x10001d000)
> --24112-- reading syms from primary file (529 439)
> --24112-- /usr/lib/system/libcache.dylib (0x100058000)
> --24112-- reading syms from primary file (28 32)
> --24112-- /usr/lib/system/libcommonCrypto.dylib (0x100062000)
> --24112-- reading syms from primary file (96 358)
> --24112-- /usr/lib/system/libcompiler_rt.dylib (0x1000b2000)
> --24112-- reading syms from primary file (291 6)
> --24112-- /usr/lib/system/libcopyfile.dylib (0x1000bf000)
> --24112-- reading syms from primary file (7 26)
> --24112-- /usr/lib/system/libdispatch.dylib (0x1000cc000)
> --24112-- reading syms from primary file (114 431)
> --24112-- /usr/lib/system/libdnsinfo.dylib (0x1000eb000)
> --24112-- reading syms from primary file (5 8)
> --24112-- /usr/lib/system/libdyld.dylib (0x1000f0000)
> --24112-- reading syms from primary file (68 92)
> --24112-- /usr/lib/system/libkeymgr.dylib (0x1000fa000)
> --24112-- reading syms from primary file (12 4)
> --24112-- /usr/lib/system/liblaunch.dylib (0x1000fe000)
> --24112-- reading syms from primary file (117 1)
> --24112-- /usr/lib/system/libmacho.dylib (0x10010f000)
> --24112-- reading syms from primary file (86 5)
> --24112-- /usr/lib/system/libquarantine.dylib (0x100121000)
> --24112-- reading syms from primary file (51 7)
> --24112-- /usr/lib/system/libremovefile.dylib (0x100128000)
> --24112-- reading syms from primary file (14 4)
> --24112-- /usr/lib/system/libsystem_blocks.dylib (0x10012e000)
> --24112-- reading syms from primary file (27 27)
> --24112-- /usr/lib/system/libsystem_c.dylib (0x100134000)
> --24112-- reading syms from primary file (1800 1823)
> ==24112== Preferring higher priority redirection:
> --24112-- old: 0x10015bcbd (memcpy$VARIANT$sse42) R-> (2018.0)
> 0x1000111d0 memcpy$VARIANT$sse42
> --24112-- new: 0x10015bcbd (memcpy$VARIANT$sse42) R-> (2018.1)
> 0x100010ed0 memmove$VARIANT$sse42
> ==24112== Preferring higher priority redirection:
> --24112-- old: 0x10015bebd (memcpy$VARIANT$sse3x) R-> (2018.0)
> 0x100011410 memcpy$VARIANT$sse3x
> --24112-- new: 0x10015bebd (memcpy$VARIANT$sse3x) R-> (2018.1)
> 0x100010d10 memmove$VARIANT$sse3x
> --24112-- /usr/lib/system/libsystem_dnssd.dylib (0x100250000)
> --24112-- reading syms from primary file (64 33)
> --24112-- /usr/lib/system/libsystem_info.dylib (0x10025e000)
> --24112-- reading syms from primary file (689 510)
> --24112-- /usr/lib/system/libsystem_kernel.dylib (0x1002af000)
> --24112-- reading syms from primary file (767 72)
> --24112-- /usr/lib/system/libsystem_network.dylib (0x1002df000)
> --24112-- reading syms from primary file (23 100)
> --24112-- /usr/lib/system/libsystem_notify.dylib (0x1002eb000)
> --24112-- reading syms from primary file (115 55)
> --24112-- /usr/lib/system/libsystem_sandbox.dylib (0x1002fb000)
> --24112-- reading syms from primary file (41 7)
> --24112-- /usr/lib/system/libunc.dylib (0x100301000)
> --24112-- reading syms from primary file (30 4)
> --24112-- /usr/lib/system/libunwind.dylib (0x100307000)
> --24112-- reading syms from primary file (102 67)
> --24112-- /usr/lib/system/libxpc.dylib (0x100314000)
> --24112-- reading syms from primary file (523 218)
> --24112-- REDIR: 0x1001d55e0 (memset) redirected to 0x100010c90 (memset)
> --24112-- REDIR: 0x1001d64e0 (strlen) redirected to 0x100010b00 (strlen)
> --24112-- REDIR: 0x1001d5178 (malloc) redirected to 0x100010607 (malloc)
> --24112-- REDIR: 0x1001d512d (calloc) redirected to 0x1000102ff (calloc)
> --24112-- REDIR: 0x10015bcbd (memcpy$VARIANT$sse42) redirected to 0x100010ed0
> (memmove$VARIANT$sse42)
> --24112-- REDIR: 0x1001d5820 (strcmp) redirected to 0x100010c50 (strcmp)
> --24112-- REDIR: 0x1001d63f0 (strncmp) redirected to 0x100010bf0 (strncmp)
> sizeof(mvk_lruc_kv_t)=152, 0x1003462e0, 0x100346378, 0x100346410, 0x1003460d0
> at index 0
> end at index 0
> at index 1
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