8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/hotspot/os_cpu/linux_sparc/thread_linux_sparc.cpp

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2003, 2017, 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.
+ *
+ * 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "memory/metaspaceShared.hpp"
+#include "runtime/frame.inline.hpp"
+#include "runtime/thread.inline.hpp"
+
+// For Forte Analyzer AsyncGetCallTrace profiling support - thread is
+// currently interrupted by SIGPROF
+bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,
+                                                     void* ucontext,
+                                                     bool isInJava) {
+  assert(Thread::current() == this, "caller must be current thread");
+  assert(this->is_Java_thread(), "must be JavaThread");
+
+  JavaThread* jt = (JavaThread *)this;
+
+  if (!isInJava) {
+    // make_walkable flushes register windows and grabs last_Java_pc
+    // which can not be done if the ucontext sp matches last_Java_sp
+    // stack walking utilities assume last_Java_pc set if marked flushed
+    jt->frame_anchor()->make_walkable(jt);
+  }
+
+  // If we have a walkable last_Java_frame, then we should use it
+  // even if isInJava == true. It should be more reliable than
+  // ucontext info.
+  if (jt->has_last_Java_frame() && jt->frame_anchor()->walkable()) {
+    *fr_addr = jt->pd_last_frame();
+    return true;
+  }
+
+  ucontext_t* uc = (ucontext_t*) ucontext;
+
+  // At this point, we don't have a walkable last_Java_frame, so
+  // we try to glean some information out of the ucontext.
+  intptr_t* ret_sp;
+  ExtendedPC addr =
+    os::fetch_frame_from_context(uc, &ret_sp,
+                                 NULL /* ret_fp only used on X86 */);
+  if (addr.pc() == NULL || ret_sp == NULL) {
+    // ucontext wasn't useful
+    return false;
+  }
+
+  if (MetaspaceShared::is_in_trampoline_frame(addr.pc())) {
+    // In the middle of a trampoline call. Bail out for safety.
+    // This happens rarely so shouldn't affect profiling.
+    return false;
+  }
+
+  // we were running Java code when SIGPROF came in
+  if (isInJava) {
+    // If we have a last_Java_sp, then the SIGPROF signal caught us
+    // right when we were transitioning from _thread_in_Java to a new
+    // JavaThreadState. We use last_Java_sp instead of the sp from
+    // the ucontext since it should be more reliable.
+    if (jt->has_last_Java_frame()) {
+      ret_sp = jt->last_Java_sp();
+    }
+    // Implied else: we don't have a last_Java_sp so we use what we
+    // got from the ucontext.
+
+    frame ret_frame(ret_sp, frame::unpatchable, addr.pc());
+    if (!ret_frame.safe_for_sender(jt)) {
+      // nothing else to try if the frame isn't good
+      return false;
+    }
+    *fr_addr = ret_frame;
+    return true;
+  }
+
+  // At this point, we know we weren't running Java code. We might
+  // have a last_Java_sp, but we don't have a walkable frame.
+  // However, we might still be able to construct something useful
+  // if the thread was running native code.
+  if (jt->has_last_Java_frame()) {
+    assert(!jt->frame_anchor()->walkable(), "case covered above");
+
+    if (jt->thread_state() == _thread_in_native) {
+      frame ret_frame(jt->last_Java_sp(), frame::unpatchable, addr.pc());
+      if (!ret_frame.safe_for_sender(jt)) {
+        // nothing else to try if the frame isn't good
+        return false;
+      }
+      *fr_addr = ret_frame;
+      return true;
+    }
+  }
+
+  // nothing else to try
+  return false;
+}
+
+void JavaThread::cache_global_variables() { }
+