8345955: Deprecate the UseOprofile flag with a view to removing the legacy oprofile support in the VM

Reviewed-by: iklam, shade

Author: David Holmes

src/hotspot/os/linux/globals_linux.hpp

@@ -36,7 +36,7 @@
                          constraint)                                    \
                                                                         \
   product(bool, UseOprofile, false,                                     \
-        "enable support for Oprofile profiler")                         \
+        "(Deprecated) enable support for Oprofile profiler")            \
                                                                         \
   product(bool, UseTransparentHugePages, false,                         \
           "Use MADV_HUGEPAGE for large pages")                          \

src/hotspot/share/runtime/arguments.cpp

@@ -524,6 +524,7 @@ static SpecialFlag const special_jvm_flags[] = {
   { "UseSharedSpaces",              JDK_Version::jdk(18), JDK_Version::jdk(19), JDK_Version::undefined() },
 #ifdef LINUX
   { "UseLinuxPosixThreadCPUClocks", JDK_Version::jdk(24), JDK_Version::jdk(25), JDK_Version::jdk(26) },
+  { "UseOprofile",                  JDK_Version::jdk(25), JDK_Version::jdk(26), JDK_Version::jdk(27) },
 #endif
   { "LockingMode",                  JDK_Version::jdk(24), JDK_Version::jdk(26), JDK_Version::jdk(27) },
   // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:

test/hotspot/jtreg/runtime/CommandLine/VMDeprecatedOptions.java

@@ -63,6 +63,13 @@ public class VMDeprecatedOptions {
             {"CreateMinidumpOnCrash", "false"}
           }
         ));
+        if (Platform.isLinux()) {
+          deprecated.addAll(
+            Arrays.asList(new String[][] {
+              {"UseOprofile", "false"}
+            })
+          );
+        }
         if (Platform.isX86() || Platform.isX64()) {
           deprecated.addAll(
             Arrays.asList(new String[][] {