Habilitando suporte para AddressSanitizer no FreeBSD

Question

A questão essencialmente é como compilar um programa que usa o AddressSanitizer no FreeBSD.

Eu uso o FreeBSD 10.0 (64 bits). Eu estou tentando compilar o código a seguir com -fsanitize=address flag:

int main() {
  return 0;
}

Quando eu compilo com clang as clang -fsanitize=address file.c , recebo a seguinte mensagem de erro:

/tmp/t-tEh7oh.o: In function 'main':
file.c:(.text+0xc4): undefined reference to '__asan_report_store4'
/tmp/t-tEh7oh.o: In function 'asan.module_ctor':
file.c:(.text+0x119): undefined reference to '__asan_init_v3'
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Quando eu compilo com gcc48 as gcc48 -fsanitize=address file.c , recebo a seguinte mensagem de erro:

/usr/local/bin/ld: cannot find -lasan
collect2: error: ld returned 1 exit status

No meu sistema GNU / Linux eu tenho libasan.* arquivos em algum lugar em um sistema de arquivos. Mas eu não consigo encontrar no FreeBSD - nem em /usr/ports , nem via pkg .

Como devo fazer isso funcionar?

Upd. Respondendo a um comentário, adicionei a saída de gcc48 -v (mais precisamente, a saída de gcc48 -fsanitize=address file.c -v ):

Using built-in specs.
COLLECT_GCC=gcc48
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/lto-wrapper
Target: x86_64-portbld-freebsd10.0
Configured with: ./../gcc-4.8.3/configure --disable-bootstrap --disable-nls --enable-gnu-indirect-function --libdir=/usr/local/lib/gcc48 --libexecdir=/usr/local/libexec/gcc48 --program-suffix=48 --with-as=/usr/local/bin/as --with-gmp=/usr/local --with-gxx-include-dir=/usr/local/lib/gcc48/include/c++/ --with-ld=/usr/local/bin/ld --with-pkgversion='FreeBSD Ports Collection' --with-system-zlib --with-ecj-jar=/usr/local/share/java/ecj-4.5.jar --enable-languages=c,c++,objc,fortran,java --prefix=/usr/local --mandir=/usr/local/man --infodir=/usr/local/info/gcc48 --build=x86_64-portbld-freebsd10.0
Thread model: posix
gcc version 4.8.3 (FreeBSD Ports Collection) 
COLLECT_GCC_OPTIONS='-fsanitize=address' '-v' '-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/cc1 -quiet -v file.c -quiet -dumpbase file.c -mtune=generic -march=x86-64 -auxbase t -version -fsanitize=address -o /tmp//ccjvAeJG.s
GNU C (FreeBSD Ports Collection) version 4.8.3 (x86_64-portbld-freebsd10.0)
    compiled by GNU C version 4.2.1 Compatible FreeBSD Clang 3.3 (tags/RELEASE_33/final 183502), GMP version 5.1.3, MPFR version 3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128184
ignoring nonexistent directory "/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../../../../x86_64-portbld-freebsd10.0/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/include
 /usr/local/include
 /usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/include-fixed
 /usr/include
End of search list.
GNU C (FreeBSD Ports Collection) version 4.8.3 (x86_64-portbld-freebsd10.0)
    compiled by GNU C version 4.2.1 Compatible FreeBSD Clang 3.3 (tags/RELEASE_33/final 183502), GMP version 5.1.3, MPFR version 3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128184
Compiler executable checksum: 6bc4873e12afab16db5dd7bf12b3232f
COLLECT_GCC_OPTIONS='-fsanitize=address' '-v' '-mtune=generic' '-march=x86-64'
 /usr/local/bin/as -v -o /tmp//ccBydWt7.o /tmp//ccjvAeJG.s
GNU assembler version 2.24 (x86_64-portbld-freebsd10.0) using BFD version (GNU Binutils) 2.24
COMPILER_PATH=/usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/:/usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/:/usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/:/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/:/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/:/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../../../../x86_64-portbld-freebsd10.0/bin/
LIBRARY_PATH=/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/:/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../../../../x86_64-portbld-freebsd10.0/lib/:/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-fsanitize=address' '-v' '-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/collect2 --eh-frame-hdr -V -dynamic-linker /libexec/ld-elf.so.1 /usr/lib/crt1.o /usr/lib/crti.o /usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/crtbegin.o -L/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3 -L/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../../../../x86_64-portbld-freebsd10.0/lib -L/usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/../../.. /tmp//ccBydWt7.o -lasan -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/local/lib/gcc48/gcc/x86_64-portbld-freebsd10.0/4.8.3/crtend.o /usr/lib/crtn.o
GNU ld (GNU Binutils) 2.24
  Supported emulations:
   elf_x86_64_fbsd
   elf_i386_fbsd
   elf_x86_64
   elf_i386
   elf_l1om
   elf_l1om_fbsd
   elf_k1om
   elf_k1om_fbsd/usr/local/bin/ld: cannot find -lasan
collect2: error: ld returned 1 exit status

    

Answer 1

Tente usar llvm37 das portas. Ele constrói os desinfetantes por padrão no AMD64.