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module core.internal.abort;
/*
* Use instead of assert(0, msg), since this does not print a message for -release compiled
* code, and druntime is -release compiled.
*/
void abort(scope string msg, scope string filename = __FILE__, size_t line = __LINE__) @nogc nothrow @safe
{
import core.stdc.stdlib: c_abort = abort;
// use available OS system calls to print the message to stderr
version (Posix)
{
import core.sys.posix.unistd: write;
static void writeStr(scope const(char)[][] m...) @nogc nothrow @trusted
{
foreach (s; m)
write(2, s.ptr, s.length);
}
}
else version (Windows)
{
import core.sys.windows.winbase : GetStdHandle, STD_ERROR_HANDLE, WriteFile, INVALID_HANDLE_VALUE;
auto h = (() @trusted => GetStdHandle(STD_ERROR_HANDLE))();
if (h == INVALID_HANDLE_VALUE)
{
// attempt best we can to print the message
/* Note that msg is scope.
* assert() calls _d_assert_msg() calls onAssertErrorMsg() calls _assertHandler() but
* msg parameter isn't scope and can escape.
* Give up and use our own immutable message instead.
*/
assert(0, "Cannot get stderr handle for message");
}
void writeStr(scope const(char)[][] m...) @nogc nothrow @trusted
{
foreach (s; m)
{
assert(s.length <= uint.max);
WriteFile(h, s.ptr, cast(uint)s.length, null, null);
}
}
}
else
static assert(0, "Unsupported OS");
import core.internal.string;
UnsignedStringBuf strbuff = void;
// write an appropriate message, then abort the program
writeStr("Aborting from ", filename, "(", line.unsignedToTempString(strbuff), ") ", msg);
c_abort();
}
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