[LLVMbugs] [Bug 19660] New: Can't build application with redefined new/delete and ASAN (multiple definition of "operator new")

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19660

            Bug ID: 19660
           Summary: Can't build application with redefined new/delete and
                    ASAN (multiple definition of "operator new")
           Product: compiler-rt
           Version: 3.4
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: altsysrq at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 12480
  --> http://llvm.org/bugs/attachment.cgi?id=12480&action=edit
Test file with redefined "operator new"

Following test code fails to build with enabled ASAN:

$ cat custom_new.cpp
#include <stdexcept>

void * operator new(std::size_t)
{
   throw std::bad_alloc();
}

int main()
{
}
$ clang++ -Wall -O0 -fsanitize=address -std=c++11 custom_new.cpp 
/tmp/custom_new-015fb3.o: In function `operator new(unsigned long)':
custom_new.cpp:(.text+0x0): multiple definition of `operator new(unsigned
long)'
/usr/bin/../lib/clang/3.4/lib/linux/libclang_rt.asan-x86_64.a(asan_new_delete.o):(.text+0x10):
first defined here
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Without replacing new operator program builds and works with ASAN enabled.

Same file builds with enabled ASAN using GCC 4.8:
$ g++ -Wall -O0 -fsanitize=address -std=c++11 custom_new.cpp

$ clang++ --version
Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix

On Ubuntu 14.04.

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