// Implementation of "setflag" command
static jint set_flag(AttachOperation* op, outputStream* out) {
const char* name = NULL;
if ((name = op->arg(0)) == NULL) {
out->print_cr("flag name is missing");
return JNI_ERR;
}
Flag* f = Flag::find_flag((char*)name, strlen(name));
if (f && f->is_external() && f->is_writeable()) {
if (f->is_bool()) {
return set_bool_flag(name, op, out);
} else if (f->is_intx()) {
return set_intx_flag(name, op, out);
} else if (f->is_uintx()) {
return set_uintx_flag(name, op, out);
} else if (f->is_uint64_t()) {
return set_uint64_t_flag(name, op, out);
} else if (f->is_ccstr()) {
return set_ccstr_flag(name, op, out);
} else {
ShouldNotReachHere();
return JNI_ERR;
}
} else {
return AttachListener::pd_set_flag(op, out);
}
}
// a writeable flag setter accepting either 'jvalue' or 'char *' values
int WriteableFlags::set_flag(const char* name, const void* value, int(*setter)(Flag*,const void*,Flag::Flags,FormatBuffer<80>&), Flag::Flags origin, FormatBuffer<80>& err_msg) {
if (name == NULL) {
err_msg.print("flag name is missing");
return MISSING_NAME;
}
if (value == NULL) {
err_msg.print("flag value is missing");
return MISSING_VALUE;
}
Flag* f = Flag::find_flag((char*)name, strlen(name));
if (f) {
// only writeable flags are allowed to be set
if (f->is_writeable()) {
return setter(f, value, origin, err_msg);
} else {
err_msg.print("only 'writeable' flags can be set");
return NON_WRITABLE;
}
}
err_msg.print("flag %s does not exist", name);
return INVALID_FLAG;
}
