clang-3.3 @3.3-r173279 can't link a C++ program with -fsanitize=memory

[acmorrow (Andrew C. Morrow)]

Clang version:

> /opt/local/bin/clang++-mp-3.3 --version
clang version 3.3 (trunk 173279)
Target: x86_64-apple-darwin12.3.0
Thread model: posix

Program:

> cat ./hello_world.cpp
#include <cstdlib>
#include <iostream>

int main(int argc, char* argv[]) {
    std::cout << "Hello, World!\n" << argc;
    return EXIT_SUCCESS;
}

Trying to compile with memory sanitizer leads to linking errors:

> /opt/local/bin/clang++-mp-3.3 hello_world.cpp -fsanitize=memory
Undefined symbols for architecture x86_64:
  "___msan_init", referenced from:
      anon in hello_world-Rm3beR.o
  "___msan_param_tls", referenced from:
      _main in hello_world-Rm3beR.o
      ___cxx_global_var_init in hello_world-Rm3beR.o
  "___msan_retval_tls", referenced from:
      _main in hello_world-Rm3beR.o
      ___cxx_global_var_init in hello_world-Rm3beR.o
ld: symbol(s) not found for architecture x86_64

Output with -###

> /opt/local/bin/clang++-mp-3.3 hello_world.cpp -fsanitize=memory -###
clang version 3.3 (trunk 173279)
Target: x86_64-apple-darwin12.3.0
Thread model: posix
 "/opt/local/libexec/llvm-3.3/bin/clang" "-cc1" "-triple" "x86_64-apple-macosx10.8.0" "-emit-obj" "-mrelax-all" "-disable-free" "-main-file-name" "hello_world.cpp" "-mrelocation-model" "pic" "-pic-level" "2" "-mdisable-fp-elim" "-masm-verbose" "-munwind-tables" "-target-cpu" "core2" "-target-linker-version" "134.9" "-resource-dir" "/opt/local/libexec/llvm-3.3/bin/../lib/clang/3.3" "-fmodule-cache-path" "/var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/clang-module-cache" "-fdeprecated-macro" "-fdebug-compilation-dir" "/Users/andrew/Documents/10gen/dev/src/experiments/hello_world" "-ferror-limit" "19" "-fmessage-length" "167" "-fsanitize=memory" "-stack-protector" "1" "-mstackrealign" "-fblocks" "-fobjc-runtime=macosx-10.8.0" "-fobjc-dispatch-method=mixed" "-fobjc-default-synthesize-properties" "-fencode-extended-block-signature" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-fcolor-diagnostics" "-backend-option" "-vectorize-loops" "-o" "/var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/hello_world-w9vsQc.o" "-x" "c++" "hello_world.cpp"
 "/opt/local/libexec/llvm-3.3/bin/ld" "-demangle" "-dynamic" "-arch" "x86_64" "-macosx_version_min" "10.8.0" "-o" "a.out" "/var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/hello_world-w9vsQc.o" "-lstdc++" "-lSystem" "/opt/local/libexec/llvm-3.3/bin/../lib/clang/3.3/lib/darwin/libclang_rt.osx.a"

Output with -v:

> /opt/local/bin/clang++-mp-3.3 hello_world.cpp -fsanitize=memory -v
clang version 3.3 (trunk 173279)
Target: x86_64-apple-darwin12.3.0
Thread model: posix
 "/opt/local/libexec/llvm-3.3/bin/clang" -cc1 -triple x86_64-apple-macosx10.8.0 -emit-obj -mrelax-all -disable-free -main-file-name hello_world.cpp -mrelocation-model pic -pic-level 2 -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 134.9 -v -resource-dir /opt/local/libexec/llvm-3.3/bin/../lib/clang/3.3 -fmodule-cache-path /var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/clang-module-cache -fdeprecated-macro -fdebug-compilation-dir /Users/andrew/Documents/10gen/dev/src/experiments/hello_world -ferror-limit 19 -fmessage-length 167 -fsanitize=memory -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime=macosx-10.8.0 -fobjc-dispatch-method=mixed -fobjc-default-synthesize-properties -fencode-extended-block-signature -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -backend-option -vectorize-loops -o /var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/hello_world-QdWhjz.o -x c++ hello_world.cpp
clang -cc1 version 3.3 based upon LLVM 3.3svn default target x86_64-apple-darwin12.3.0
ignoring nonexistent directory "/usr/include/c++/4.2.1/i686-apple-darwin10/x86_64"
ignoring nonexistent directory "/usr/include/c++/4.0.0"
ignoring nonexistent directory "/usr/include/c++/4.0.0/i686-apple-darwin8/"
ignoring nonexistent directory "/usr/include/c++/4.0.0/backward"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.2.1
 /usr/include/c++/4.2.1/backward
 /usr/local/include
 /opt/local/libexec/llvm-3.3/bin/../lib/clang/3.3/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)
End of search list.
 "/opt/local/libexec/llvm-3.3/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.8.0 -o a.out /var/folders/n4/y_lrzpxd3n99l4frqx4m8llw0000gt/T/hello_world-QdWhjz.o -lstdc++ -lSystem /opt/local/libexec/llvm-3.3/bin/../lib/clang/3.3/lib/darwin/libclang_rt.osx.a
Undefined symbols for architecture x86_64:
  "___msan_init", referenced from:
      anon in hello_world-QdWhjz.o
  "___msan_param_tls", referenced from:
      _main in hello_world-QdWhjz.o
      ___cxx_global_var_init in hello_world-QdWhjz.o
  "___msan_retval_tls", referenced from:
      _main in hello_world-QdWhjz.o
      ___cxx_global_var_init in hello_world-QdWhjz.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

[jeremyhu (Jeremy Huddleston Sequoia)]

I believe msan isn't supported on darwin. Please work upstream.