svm: adopt "JDK-8347719: [REDO] Portable implementation of FORBID_C_FUNCTION and ALLOW_C_FUNCTION"

Author: zapster

substratevm/src/com.oracle.svm.native.libcontainer/src/hotspot/share/runtime/os.cpp

@@ -86,7 +86,9 @@
 #include "utilities/fastrand.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
+#endif // !NATIVE_IMAGE
 #include "utilities/permitForbiddenFunctions.hpp"
+#ifndef NATIVE_IMAGE
 #include "utilities/powerOfTwo.hpp"
 
 #ifdef LINUX

substratevm/src/com.oracle.svm.native.libcontainer/src/hotspot/share/utilities/globalDefinitions.hpp

@@ -28,7 +28,9 @@
 
 #include "utilities/compilerWarnings.hpp"
 #include "utilities/debug.hpp"
+#ifndef NATIVE_IMAGE
 #include "utilities/forbiddenFunctions.hpp"
+#endif // !NATIVE_IMAGE
 #include "utilities/macros.hpp"
 
 #ifndef NATIVE_IMAGE

substratevm/src/com.oracle.svm.native.libcontainer/src/hotspot/share/utilities/permitForbiddenFunctions.hpp

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef SHARE_UTILITIES_PERMITFORBIDDENFUNCTIONS_HPP
+#define SHARE_UTILITIES_PERMITFORBIDDENFUNCTIONS_HPP
+
+#include "utilities/compilerWarnings.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+#ifndef NATIVE_IMAGE
+#ifdef _WINDOWS
+#include "permitForbiddenFunctions_windows.hpp"
+#else
+#include "permitForbiddenFunctions_posix.hpp"
+#endif
+#endif // !NATIVE_IMAGE
+
+// Provide wrappers for some functions otherwise forbidden from use in HotSpot.
+//
+// There may be special circumstances where an otherwise forbidden function
+// really does need to be used.  One example is in the implementation of a
+// corresponding os:: function.
+//
+// Wrapper functions are provided for such forbidden functions.  These
+// wrappers are defined in a context where the forbidding warnings are
+// suppressed.  They are defined in a special namespace, to highlight uses as
+// unusual and requiring increased scrutiny.
+//
+// Note that there are several seemingly plausible shorter alternatives to
+// these written-out wrapper functions.  All that have been tried don't work
+// for one reason or another.
+
+namespace permit_forbidden_function {
+BEGIN_ALLOW_FORBIDDEN_FUNCTIONS
+
+#ifndef NATIVE_IMAGE
+[[noreturn]] inline void exit(int status) { ::exit(status); }
+[[noreturn]] inline void _exit(int status) { ::_exit(status); }
+#endif // !NATIVE_IMAGE
+
+ATTRIBUTE_PRINTF(3, 0)
+inline int vsnprintf(char* str, size_t size, const char* format, va_list ap) {
+  return ::vsnprintf(str, size, format, ap);
+}
+
+#ifndef NATIVE_IMAGE
+inline void* malloc(size_t size) { return ::malloc(size); }
+inline void free(void* ptr) { return ::free(ptr); }
+inline void* calloc(size_t nmemb, size_t size) { return ::calloc(nmemb, size); }
+inline void* realloc(void* ptr, size_t size) { return ::realloc(ptr, size); }
+
+inline char* strdup(const char* s) { return ::strdup(s); }
+#endif // !NATIVE_IMAGE
+
+END_ALLOW_FORBIDDEN_FUNCTIONS
+} // namespace permit_forbidden_function
+
+#endif // SHARE_UTILITIES_PERMITFORBIDDENFUNCTIONS_HPP