Address sanitizer complains when exceptions are thrown

[HK47196]

minimal example:

#include <boost/context/all.hpp>

namespace bcx = boost::context;

int main(){
  auto c = bcx::callcc([](bcx::continuation&& c_){
    try {
      throw 5;
    } catch(const int&){
    }
    return std::move(c_);
  });
}

output:

==21820==WARNING: ASan is ignoring requested __asan_handle_no_return: stack top: 0x7ffc47270000; bottom 0x631000023000; size: 0x1cec4724d000 (31801131454464)
False positive error reports may follow
For details see https://github.com/google/sanitizers/issues/189

clang v5.0.0 and gcc 7.2.1, boost 1.65.1

[olk]

It's not an error Am 09.12.2017 22:35 schrieb "rsw0x" <notifications@github.com>:

…

minimal example: #include <boost/context/all.hpp> namespace bcx = boost::context; int main(){ auto c = bcx::callcc([](bcx::continuation&& c_){ try { throw 5; } catch(const int&){ } return std::move(c_); }); } output: ==21820==WARNING: ASan is ignoring requested __asan_handle_no_return: stack top: 0x7ffc47270000; bottom 0x631000023000; size: 0x1cec4724d000 (31801131454464) False positive error reports may follow For details see google/sanitizers#189 clang v5.0.0 and gcc 7.2.1, boost 1.65.1 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#70>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA30QHmbb_sXIFD5RfAzuM0bSGvmGE1sks5s-v0QgaJpZM4Q8QoO> .

[olk]

You have to use ucontext as implementation and apply BOOST_USE_ASAN:
b2 cxxflags="-fsanitize=address -std=c++11 context-impl=ucontext -DBOOST_USE_ASAN" linkflags="-lasan"

but you still get the warning:
==10360==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases!