home/src/assert.cc

#include "assert.hh"

#include "exception.hh"
#include "debug.hh"
#include "backtrace.hh"

#if defined(__CYGWIN__)
#include <windows.h>
#endif

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>

namespace Kakoune
{

struct assert_failed : logic_error
{
    assert_failed(String message)
        : m_message(std::move(message)) {}

    StringView what() const override { return m_message; }
private:
    String m_message;
};

bool notify_fatal_error(const String& msg)
{
#if defined(__CYGWIN__)
    int res = MessageBox(NULL, msg.c_str(), "Kakoune: assert failed",
                         MB_OKCANCEL | MB_ICONERROR);
    switch (res)
    {
    case IDCANCEL:
        return false;
    case IDOK:
        return true;
    }
#elif defined(__linux__)
    auto cmd = "xmessage -buttons 'quit:0,ignore:1' '" + msg + "'";
    if (system(cmd.c_str()) == 1)
        return true;
#endif
    return false;
}

void on_assert_failed(const char* message)
{
    char* callstack = Backtrace{}.desc();
    String debug_info = format("pid: {}\ncallstack:\n{}", getpid(), callstack);
    free(callstack);
    write_debug(format("assert failed: '{}'\n{}", message, debug_info));

    const auto msg = format("{}\n[Debug Infos]\n{}", message, debug_info);
    if (not notify_fatal_error(msg))
        throw assert_failed(msg);
}

}