1.1 --- a/src/os/linux/vm/os_linux.cpp Wed Jul 03 20:04:13 2019 +0800
1.2 +++ b/src/os/linux/vm/os_linux.cpp Wed Jul 03 20:42:37 2019 +0800
1.3 @@ -1,5 +1,5 @@
1.4 /*
1.5 - * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
1.7 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 *
1.9 * This code is free software; you can redistribute it and/or modify it
1.10 @@ -724,6 +724,10 @@
1.11 }
1.12 }
1.13
1.14 +void os::Linux::expand_stack_to(address bottom) {
1.15 + _expand_stack_to(bottom);
1.16 +}
1.17 +
1.18 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) {
1.19 assert(t!=NULL, "just checking");
1.20 assert(t->osthread()->expanding_stack(), "expand should be set");
1.21 @@ -6354,10 +6358,16 @@
1.22 // or -1 on failure (e.g. can't fork a new process).
1.23 // Unlike system(), this function can be called from signal handler. It
1.24 // doesn't block SIGINT et al.
1.25 -int os::fork_and_exec(char* cmd) {
1.26 +int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
1.27 const char * argv[4] = {"sh", "-c", cmd, NULL};
1.28
1.29 - pid_t pid = fork();
1.30 + pid_t pid ;
1.31 +
1.32 + if (use_vfork_if_available) {
1.33 + pid = vfork();
1.34 + } else {
1.35 + pid = fork();
1.36 + }
1.37
1.38 if (pid < 0) {
1.39 // fork failed
