Hey All-
I've been continuing to dig into the phenomenon of code crashing when catching
a C++ exception in a .mm file. I'm finding that even though my test passes
when it's included in the libobjc2 test bundle, it fails when I compile it from
the command line. I narrowed down the compilation command, and found that the
seg fault stops happening if I remove -fgnu-runtime from the compile command
(I've copied the commands and the program below).
Should I not be compiling with -fgnu-runtime when I'm using the libobjc2
runtime?
--David
Compilation command that results in crash:
/home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang++
test.mm -c \
-fPIC -Wall -Wall -Werror -fobjc-runtime=gnustep-1.8 -DHAVE_CONFIG_H
-D_GNU_SOURCE -fgnu-runtime -I .. -I ../../common/include \
-o test.mm.o
/home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang++ -o
test \
./test.mm.o \
-L../../common/lib -L.. -lobjc
Command with no crash (only change is remove -fgnu-runtime):
/home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang++
test.mm -c \
-fPIC -Wall -Wall -Werror -fobjc-runtime=gnustep-1.8 -DHAVE_CONFIG_H
-D_GNU_SOURCE -I .. -I ../../common/include \
-o test.mm.o
/home/dlobron/build/clangport/akamai/llvm/llvm-5.0.0.install/bin/clang++ -o
test \
./test.mm.o \
-L../../common/lib -L.. -lobjc
Program (C++ code in a .mm file):
$ cat test.mm
#include <iostream>
using namespace std;
int main(int argc, char *argv[]) {
try {
throw exception();
} catch (exception &e) {
}
return 0;
}
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