C++ in jemalloc

[Mark Millard]

On 2017-Oct-6, at 11:42 PM, Roman Divacky <rdivacky at vlakno.cz> wrote:

> Just to clarify my not agreeing with Mark regarding EH on ppc64.
> 
> Last time I tried to fix ppc64 exceptions handling as generated by clang
> it turned out that simply using gnu ld from ports fixes the issue.
> 
> For details see:
> https://lists.freebsd.org/pipermail/freebsd-toolchain/2017-May/002961.html

Unfortunately my experiments failed to confirm this. Repeating
them now under head -r324071 and ports -r450478 :

# more exception_test.cpp 
#include <exception>

int main(void)
{
    try { throw std::exception(); }
    catch (std::exception& e) {}
    return 0;
}

# clang++ -B /usr/local/powerpc64-freebsd/bin -std=c++14 -g -O2 exception_test.cpp

# ./a.out
Segmentation fault (core dumped)

# clang++ -B /usr/local/powerpc64-freebsd/bin -std=c++11 -g exception_test.cpp

# ./a.out
Segmentation fault (core dumped)


# ls -lt /usr/local/powerpc64-freebsd/bin
total 56704
lrwxr-xr-x  1 root  wheel       32 Jul  2 19:27 size -> ../../bin/powerpc64-freebsd-size
-r-xr-xr-x  4 root  wheel  7072791 Jul  2 19:27 ld
-r-xr-xr-x  4 root  wheel  7072791 Jul  2 19:27 ld.bfd
-r-xr-xr-x  2 root  wheel  6881822 Jul  2 19:27 as
-r-xr-xr-x  2 root  wheel  6128889 Jul  2 19:27 strip
-r-xr-xr-x  2 root  wheel  5253417 Jul  2 19:27 nm
-r-xr-xr-x  2 root  wheel  1284139 Jul  2 19:27 readelf
-r-xr-xr-x  2 root  wheel  6128882 Jul  2 19:27 objcopy
-r-xr-xr-x  2 root  wheel  5384166 Jul  2 19:27 ranlib
-r-xr-xr-x  2 root  wheel  5384159 Jul  2 19:27 ar
-r-xr-xr-x  2 root  wheel  6914775 Jul  2 19:27 objdump

# clang++ -B /usr/local/powerpc64-portbld-freebsd12.0/bin/ -std=c++14 -g -O2 exception_test.cpp

# ./a.out
Segmentation fault (core dumped)

# clang++ -B /usr/local/powerpc64-portbld-freebsd12.0/bin/ -std=c++11 -g exception_test.cpp

# ./a.out
Segmentation fault (core dumped)


# ls -lt /usr/local/powerpc64-portbld-freebsd12.0/bin/
total 363584
-r-xr-xr-x  4 root  wheel  59993201 Jul  2 23:44 ld
-r-xr-xr-x  4 root  wheel  59993201 Jul  2 23:44 ld.bfd
-r-xr-xr-x  2 root  wheel  29843304 Jul  2 23:44 as
-r-xr-xr-x  2 root  wheel  29046519 Jul  2 23:44 strip
-r-xr-xr-x  2 root  wheel  28207257 Jul  2 23:44 nm
-r-xr-xr-x  2 root  wheel   1178483 Jul  2 23:44 readelf
-r-xr-xr-x  1 root  wheel  28329180 Jul  2 23:44 dlltool
-r-xr-xr-x  2 root  wheel  29046512 Jul  2 23:44 objcopy
-r-xr-xr-x  2 root  wheel  28334599 Jul  2 23:44 ranlib
-r-xr-xr-x  2 root  wheel  28334592 Jul  2 23:44 ar
-r-xr-xr-x  2 root  wheel  49540244 Jul  2 23:44 objdump


===
Mark Millard
markmi at dsl-only.net