ThreadSanitizer FATAL exception when running

When I encountered this failure on SLES11SP3 using clang 3.4.2's TSan, I was able to fix it by first altering the ulimit for my shell such that I could create a mapping that large, and then I needed to execute it as the superuser.

$ ./a.outFATAL: ThreadSanitizer CHECK failed: bri/llvm-3.4.2.src/projects/compiler-rt/lib/sanitizer_common/sanitizer_allocator.h:316 "((kSpaceBeg)) == (( reinterpret_cast<uptr>(Mprotect(kSpaceBeg, kSpaceSize))))" (0x7d0000000000, 0xfffffffffffffff4)FATAL: ThreadSanitizer: failed to intercept pthread_mutex_lock$ ulimit -v10588960$ ulimit -v $((10588960*1024))$ ulimit -v10843095040$ ./a.out==11348==WARNING: Program is run with limited virtual address space, which wouldn't work with ThreadSanitizer.==11348==Re-execing with unlimited virtual address space.==11348==WARNING: Program is run with limited virtual address space, which wouldn't work with ThreadSanitizer.==11348==Re-execing with unlimited virtual address space.==11348==WARNING: Program is run with limited virtual address space, which wouldn't work with ThreadSanitizer.==11348==Re-execing with unlimited virtual address space....# only able to recover w/Ctrl-C...$ sudo ./a.outroot's password:==11351==WARNING: Program is run with limited virtual address space, which wouldn't work with ThreadSanitizer.==11351==Re-execing with unlimited virtual address space.llvm-symbolizer: Unknown command line argument '--default-arch=x86_64'.  Try: '/usr/bin/llvm-symbolizer -help'llvm-symbolizer: Did you mean '-demangle=x86_64'?==11351==WARNING: Can't read from symbolizer at fd 3llvm-symbolizer: Unknown command line argument '--default-arch=x86_64'.  Try: '/usr/bin/llvm-symbolizer -help'llvm-symbolizer: Did you mean '-demangle=x86_64'?==11351==WARNING: external symbolizer didn't start up correctly!==11351==WARNING: Failed to use and restart external symbolizer!==================WARNING: ThreadSanitizer: data race (pid=11351)  Write of size 4 at 0x7fbca5148c48 by thread T1:    #0 Thread1 /home/bri/tmp/tsan/tiny_race.c:4 (exe+0x0000000ad64f)    #1 <null> <null>:0 (a.out+0x000000052af4)  Previous write of size 4 at 0x7fbca5148c48 by main thread:    #0 main /home/bri/tmp/tsan/tiny_race.c:11 (exe+0x0000000ad6a3)  Thread T1 (tid=11354, running) created by main thread at:    #0 pthread_create bri/tsan/rtl/tsan_interceptors.cc:877 (exe+0x000000052c2b)    #1 main /home/bri/tmp/tsan/tiny_race.c:10 (exe+0x0000000ad694)SUMMARY: ThreadSanitizer: data race /home/bri/tmp/tsan/tiny_race.c:4 Thread1==================ThreadSanitizer: reported 1 warnings

The symbolizer warnings are likely failures related to my particular build of clang, just ignore them. It's probably only used for demangling C++ symbol names.