Opened 12 years ago

Closed 11 years ago

#38527 closed defect (fixed)

libclang_rt.asan_osx_dynamic.dylib has incorrect dylib id

Reported by: acmorrow (Andrew C. Morrow) Owned by: jeremyhu (Jeremy Huddleston Sequoia)
Priority: Normal Milestone:
Component: ports Version: 2.1.3
Keywords: Cc: dh@…, larryv (Lawrence Velázquez), cooljeanius (Eric Gallager)
Port: clang-3.2, clang-3.3, clang-3.4

Description (last modified by larryv (Lawrence Velázquez))

I'm using clang-3.3 @3.3-r173279:

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

Given a simple hello world C++ program compiled with -fsanitize=address, the resulting binary cannot execute.

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

int main(int argc, char* argv[]) {
  std::cout << "Hello, World!\n";
  return EXIT_SUCCESS;
}
>  /opt/local/bin/clang-mp-3.3 ./hello_world.cpp -fsanitize=address -o ./hello_world
>  ./hello_world
dyld: Library not loaded: /opt/local/var/macports/build/_opt_mports_dports_lang_llvm-3.3/clang-3.3/work/trunk/Release+Debug+Asserts/lib/clang/3.3/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
  Referenced from: hello_world/./hello_world
  Reason: image not found
[1]    62828 trace trap  ./hello_world

It looks as if it is looking for the asan support library in the original build path, not the install path. But we do find that library in the install for the port:

>  mdfind -name libclang_rt.asan_osx_dynamic.dylib
/opt/local/libexec/llvm-3.3/lib/clang/3.3/lib/darwin/libclang_rt.asan_osx_dynamic.dylib

Adding the containing directory to the DYLD_LIBRARY_PATH fixes things: the binary now runs:

>  DYLD_LIBRARY_PATH=/opt/local/libexec/llvm-3.3/lib/clang/3.3/lib/darwin ./hello_world
Hello, World!

AddressSanitizer is super useful, it would be great if it worked out of the box for macports clang.

Change History (8)

comment:1 Changed 12 years ago by acmorrow (Andrew C. Morrow)

Cc: andrew.c.morrow@… added

Cc Me!

comment:2 Changed 12 years ago by larryv (Lawrence Velázquez)

Cc: andrew.c.morrow@… removed
Description: modified (diff)
Owner: changed from macports-tickets@… to jeremyhu@…

Thanks for the ticket. In the future, please Cc relevant port maintainers. Also, you don’t have to Cc yourself.

comment:3 Changed 11 years ago by acmorrow (Andrew C. Morrow)

One workaround for this is to change to the directory where libclang_rt.asan lives and use install_name_tool to patch it up:

$ mdfind -name libclang_rt.asan_osx_dynamic.dylib
/opt/local/libexec/llvm-3.4/lib/clang/3.4/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
/opt/local/libexec/llvm-3.3/lib/clang/3.3/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
/opt/local/libexec/llvm-3.2/lib/clang/3.2/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
$ cd /opt/local/libexec/llvm-3.4/lib/clang/3.4/lib/darwin/
$ sudo install_name_tool -id $(grealpath ./libclang_rt.asan_osx_dynamic.dylib) ./libclang_rt.asan_osx_dynamic.dylib

You will need to re-link any executables built with -fsanitize=address so they pick up the new install name. Obviously, if you re-install the port, you will need to redo this.

comment:4 Changed 11 years ago by ryandesign (Ryan Carsten Schmidt)

Cc: dh@… larryv@… added
Port: clang-3.2 clang-3.4 added
Summary: clang-3.3 @3.3-r173279 AddressSanitizer binaries don't work without explicitly setting DYLD_LIBRARY_PATHclang-3.2, clang-3.3, clang-3.4: AddressSanitizer binaries don't work without explicitly setting DYLD_LIBRARY_PATH

Has duplicate #39267.

comment:5 Changed 11 years ago by jeremyhu (Jeremy Huddleston Sequoia)

I'll pull this into the next llvm bump.

comment:6 Changed 11 years ago by jeremyhu (Jeremy Huddleston Sequoia)

Summary: clang-3.2, clang-3.3, clang-3.4: AddressSanitizer binaries don't work without explicitly setting DYLD_LIBRARY_PATHlibclang_rt.asan_osx_dynamic.dylib has incorrect dylib id

comment:7 Changed 11 years ago by cooljeanius (Eric Gallager)

Cc: egall@… added

Cc Me!

comment:8 Changed 11 years ago by jeremyhu (Jeremy Huddleston Sequoia)

Resolution: fixed
Status: newclosed
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