// 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; }