misc/cgo/testsanitizers: for MemorySanitizer, Linux kernel ≥ 4.1 requires clang ≥ 3.8.0

[mewmew]

I get this error while running all.bash. It looks similar issue #12814, but as I've got GCC installed, I don't think it is related to Clang. (also, my installed version of Clang is above 3.6). Re-posting this in a separate issue, per Ian's request

[~]$ gcc --version
gcc (GCC) 5.2.0

[~]$ clang --version
clang version 3.7.0 (tags/RELEASE_370/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix

[~]$ go version
go version devel +ae31599 Thu Oct 8 23:15:40 2015 +0000 linux/amd64

[~]$ uname -a
Linux x220 4.2.2-1-ARCH #1 SMP PREEMPT Tue Sep 29 22:21:33 CEST 2015 x86_64 GNU/Linux

And the error is as follows:

##### ../misc/cgo/testsanitizers
FATAL: Code 0x55b1cb4d8e20 is out of application range. Non-PIE build?
FATAL: MemorySanitizer can not mmap the shadow memory.
FATAL: Make sure to compile with -fPIE and to link with -pie.
FATAL: Disabling ASLR is known to cause this error.
FATAL: If running under GDB, try 'set disable-randomization off'.
==21153==Process memory map follows:
    0x55b1cb3f6000-0x55b1cb6fa000   /tmp/go-build208042185/command-line-arguments/_obj/exe/msan
    0x55b1cb8f9000-0x55b1cb901000   /tmp/go-build208042185/command-line-arguments/_obj/exe/msan
    0x55b1cb901000-0x55b1cdd9c000   
    0x7f0a2addf000-0x7f0a2b131000   
    0x7f0a2b131000-0x7f0a2b2cc000   /usr/lib/libc-2.22.so
    0x7f0a2b2cc000-0x7f0a2b4cb000   /usr/lib/libc-2.22.so
    0x7f0a2b4cb000-0x7f0a2b4cf000   /usr/lib/libc-2.22.so
    0x7f0a2b4cf000-0x7f0a2b4d1000   /usr/lib/libc-2.22.so
    0x7f0a2b4d1000-0x7f0a2b4d5000   
    0x7f0a2b4d5000-0x7f0a2b4eb000   /usr/lib/libgcc_s.so.1
    0x7f0a2b4eb000-0x7f0a2b6ea000   /usr/lib/libgcc_s.so.1
    0x7f0a2b6ea000-0x7f0a2b6eb000   /usr/lib/libgcc_s.so.1
    0x7f0a2b6eb000-0x7f0a2b6ee000   /usr/lib/libdl-2.22.so
    0x7f0a2b6ee000-0x7f0a2b8ed000   /usr/lib/libdl-2.22.so
    0x7f0a2b8ed000-0x7f0a2b8ee000   /usr/lib/libdl-2.22.so
    0x7f0a2b8ee000-0x7f0a2b8ef000   /usr/lib/libdl-2.22.so
    0x7f0a2b8ef000-0x7f0a2b9ec000   /usr/lib/libm-2.22.so
    0x7f0a2b9ec000-0x7f0a2bbeb000   /usr/lib/libm-2.22.so
    0x7f0a2bbeb000-0x7f0a2bbec000   /usr/lib/libm-2.22.so
    0x7f0a2bbec000-0x7f0a2bbed000   /usr/lib/libm-2.22.so
    0x7f0a2bbed000-0x7f0a2bbf4000   /usr/lib/librt-2.22.so
    0x7f0a2bbf4000-0x7f0a2bdf3000   /usr/lib/librt-2.22.so
    0x7f0a2bdf3000-0x7f0a2bdf4000   /usr/lib/librt-2.22.so
    0x7f0a2bdf4000-0x7f0a2bdf5000   /usr/lib/librt-2.22.so
    0x7f0a2bdf5000-0x7f0a2be0d000   /usr/lib/libpthread-2.22.so
    0x7f0a2be0d000-0x7f0a2c00c000   /usr/lib/libpthread-2.22.so
    0x7f0a2c00c000-0x7f0a2c00d000   /usr/lib/libpthread-2.22.so
    0x7f0a2c00d000-0x7f0a2c00e000   /usr/lib/libpthread-2.22.so
    0x7f0a2c00e000-0x7f0a2c012000   
    0x7f0a2c012000-0x7f0a2c034000   /usr/lib/ld-2.22.so
    0x7f0a2c216000-0x7f0a2c21b000   
    0x7f0a2c229000-0x7f0a2c233000   
    0x7f0a2c233000-0x7f0a2c234000   /usr/lib/ld-2.22.so
    0x7f0a2c234000-0x7f0a2c235000   /usr/lib/ld-2.22.so
    0x7f0a2c235000-0x7f0a2c236000   
    0x7ffdda888000-0x7ffdda8a9000   [stack]
    0x7ffdda9ba000-0x7ffdda9bc000   [vvar]
    0x7ffdda9bc000-0x7ffdda9be000   [vdso]
    0xffffffffff600000-0xffffffffff601000   [vsyscall]
==21153==End of process memory map.
exit status 77

Please let me know if any other information is required.

[bradfitz]

Which distro?

[mewmew]

Arch Linux.

[ianlancetaylor]

What does cc --version print?

[mewmew]

[~]$ cc --version
cc (GCC) 5.2.0

[0xmohit]

Also observing it on ubuntu 15.10.

$  gcc --version
gcc (Ubuntu 5.2.1-22ubuntu2) 5.2.1 20151010
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$  uname -a
Linux earth 4.2.0-16-generic #19-Ubuntu SMP Thu Oct 8 15:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Must add that I'd never run into this earlier (upgraded recently from ubuntu 15.04 which had gcc 4.9.x and kernel 3.19.0.31).

Relevant output from bash all.bash:

##### ../misc/cgo/testsanitizers
FATAL: Code 0x5631fe1914e0 is out of application range. Non-PIE build?
FATAL: MemorySanitizer can not mmap the shadow memory.
FATAL: Make sure to compile with -fPIE and to link with -pie.
FATAL: Disabling ASLR is known to cause this error.
FATAL: If running under GDB, try 'set disable-randomization off'.
==26340==Process memory map follows:
    0x5631fe08f000-0x5631fe3c4000   /tmp/go-build478133321/command-line-arguments/_obj/exe/msan
    0x5631fe5c4000-0x5631fe5cc000   /tmp/go-build478133321/command-line-arguments/_obj/exe/msan
    0x5631fe5cc000-0x563200a5d000   
    0x7f70c8f3e000-0x7f70c9290000   
    0x7f70c9290000-0x7f70c9450000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f70c9450000-0x7f70c9650000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f70c9650000-0x7f70c9654000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f70c9654000-0x7f70c9656000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f70c9656000-0x7f70c965a000   
    0x7f70c965a000-0x7f70c9670000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f70c9670000-0x7f70c986f000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f70c986f000-0x7f70c9870000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f70c9870000-0x7f70c9871000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f70c9871000-0x7f70c9874000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f70c9874000-0x7f70c9a73000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f70c9a73000-0x7f70c9a74000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f70c9a74000-0x7f70c9a75000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f70c9a75000-0x7f70c9b7c000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f70c9b7c000-0x7f70c9d7b000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f70c9d7b000-0x7f70c9d7c000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f70c9d7c000-0x7f70c9d7d000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f70c9d7d000-0x7f70c9d84000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f70c9d84000-0x7f70c9f83000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f70c9f83000-0x7f70c9f84000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f70c9f84000-0x7f70c9f85000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f70c9f85000-0x7f70c9f9d000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f70c9f9d000-0x7f70ca19d000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f70ca19d000-0x7f70ca19e000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f70ca19e000-0x7f70ca19f000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f70ca19f000-0x7f70ca1a3000   
    0x7f70ca1a3000-0x7f70ca1c7000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f70ca3a1000-0x7f70ca3a6000   
    0x7f70ca3bf000-0x7f70ca3c6000   
    0x7f70ca3c6000-0x7f70ca3c7000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f70ca3c7000-0x7f70ca3c8000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f70ca3c8000-0x7f70ca3c9000   
    0x7ffd1a789000-0x7ffd1a7aa000   [stack]
    0x7ffd1a7e2000-0x7ffd1a7e4000   [vvar]
    0x7ffd1a7e4000-0x7ffd1a7e6000   [vdso]
    0xffffffffff600000-0xffffffffff601000   [vsyscall]
==26340==End of process memory map.
exit status 77
FAIL: msan
FATAL: Code 0x55e2d585c330 is out of application range. Non-PIE build?
FATAL: MemorySanitizer can not mmap the shadow memory.
FATAL: Make sure to compile with -fPIE and to link with -pie.
FATAL: Disabling ASLR is known to cause this error.
FATAL: If running under GDB, try 'set disable-randomization off'.
==26542==Process memory map follows:
    0x55e2d57ca000-0x55e2d5991000   /tmp/go-build391327895/command-line-arguments/_obj/exe/msan2
    0x55e2d5b91000-0x55e2d5b96000   /tmp/go-build391327895/command-line-arguments/_obj/exe/msan2
    0x55e2d5b96000-0x55e2d8027000   
    0x7f03bf845000-0x7f03bfb97000   
    0x7f03bfb97000-0x7f03bfd57000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f03bfd57000-0x7f03bff57000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f03bff57000-0x7f03bff5b000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f03bff5b000-0x7f03bff5d000   /lib/x86_64-linux-gnu/libc-2.21.so
    0x7f03bff5d000-0x7f03bff61000   
    0x7f03bff61000-0x7f03bff77000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f03bff77000-0x7f03c0176000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f03c0176000-0x7f03c0177000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f03c0177000-0x7f03c0178000   /lib/x86_64-linux-gnu/libgcc_s.so.1
    0x7f03c0178000-0x7f03c017b000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f03c017b000-0x7f03c037a000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f03c037a000-0x7f03c037b000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f03c037b000-0x7f03c037c000   /lib/x86_64-linux-gnu/libdl-2.21.so
    0x7f03c037c000-0x7f03c0483000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f03c0483000-0x7f03c0682000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f03c0682000-0x7f03c0683000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f03c0683000-0x7f03c0684000   /lib/x86_64-linux-gnu/libm-2.21.so
    0x7f03c0684000-0x7f03c068b000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f03c068b000-0x7f03c088a000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f03c088a000-0x7f03c088b000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f03c088b000-0x7f03c088c000   /lib/x86_64-linux-gnu/librt-2.21.so
    0x7f03c088c000-0x7f03c08a4000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f03c08a4000-0x7f03c0aa4000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f03c0aa4000-0x7f03c0aa5000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f03c0aa5000-0x7f03c0aa6000   /lib/x86_64-linux-gnu/libpthread-2.21.so
    0x7f03c0aa6000-0x7f03c0aaa000   
    0x7f03c0aaa000-0x7f03c0ace000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f03c0ca8000-0x7f03c0cad000   
    0x7f03c0cc6000-0x7f03c0ccd000   
    0x7f03c0ccd000-0x7f03c0cce000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f03c0cce000-0x7f03c0ccf000   /lib/x86_64-linux-gnu/ld-2.21.so
    0x7f03c0ccf000-0x7f03c0cd0000   
    0x7ffc61aec000-0x7ffc61b0d000   [stack]
    0x7ffc61bed000-0x7ffc61bef000   [vvar]
    0x7ffc61bef000-0x7ffc61bf1000   [vdso]
    0xffffffffff600000-0xffffffffff601000   [vsyscall]
==26542==End of process memory map.
exit status 77
FAIL: msan2

[Lekensteyn]

Looks like an upstream issue with LLVM/compiler-rt: https://llvm.org/bugs/show_bug.cgi?id=24155

A fix was pushed earlier this month (Oct 2015), it will likely be shipped with 3.8.0 (no backport to 3.7 given the API breakage). I've proposed a backport for Arch Linux users: https://bugs.archlinux.org/task/46913

I don't see any similar bug for Ubuntu at https://launchpad.net/ubuntu/+source/llvm-toolchain-3.6/+bugs, you could report it if you find it useful. I have not checked whether the patches apply to 3.6 though.

[rsc]

@Lekensteyn, thanks for those links.

@ianlancetaylor, sent you CL 17254.

[gopherbot]

CL https://golang.org/cl/17254 mentions this issue.

[gopherbot]

CL https://golang.org/cl/17323 mentions this issue.