Flag::Error CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
ccstr old_value = faddr->get_ccstr();
trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
char* new_value = os::strdup_check_oom(value);
faddr->set_ccstr(new_value);
if (!faddr->is_default() && old_value != NULL) {
// Prior value is heap allocated so free it.
FREE_C_HEAP_ARRAY(char, old_value);
}
faddr->set_origin(origin);
return Flag::SUCCESS;
}
Flag::Error CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return Flag::INVALID_FLAG;
if (!result->is_ccstr()) return Flag::WRONG_FORMAT;
ccstr old_value = result->get_ccstr();
trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
char* new_value = NULL;
if (*value != NULL) {
new_value = os::strdup_check_oom(*value);
}
result->set_ccstr(new_value);
if (result->is_default() && old_value != NULL) {
// Prior value is NOT heap allocated, but was a literal constant.
old_value = os::strdup_check_oom(old_value);
}
*value = old_value;
result->set_origin(origin);
return Flag::SUCCESS;
}
bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
assert((size_t)flag < Flag::numFlags, "bad command line flag index");
Flag* f = &Flag::flags[flag];
return f->is_default();
}
