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src/os_cpu/linux_ppc/vm/thread_linux_ppc.cpp

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   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "runtime/frame.hpp"
  28 #include "runtime/thread.hpp"
  29 



















































  30 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/PPC.
  31 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
  32   Unimplemented();
  33   return false;
  34 }
  35 
  36 void JavaThread::cache_global_variables() { }


   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "runtime/frame.inline.hpp"
  28 #include "runtime/thread.hpp"
  29 
  30 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
  31   assert(this->is_Java_thread(), "must be JavaThread");
  32 
  33   // If we have a last_Java_frame, then we should use it even if
  34   // isInJava == true.  It should be more reliable than ucontext info.
  35   if (has_last_Java_frame() && frame_anchor()->walkable()) {
  36     *fr_addr = pd_last_frame();
  37     return true;
  38   }
  39 
  40   // At this point, we don't have a last_Java_frame, so
  41   // we try to glean some information out of the ucontext
  42   // if we were running Java code when SIGPROF came in.
  43   if (isInJava) {
  44     ucontext_t* uc = (ucontext_t*) ucontext;
  45     frame ret_frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/],
  46                      (address)uc->uc_mcontext.regs->nip);
  47 
  48     if (ret_frame.pc() == NULL) {
  49       // ucontext wasn't useful
  50       return false;
  51     }
  52 
  53     if (ret_frame.is_interpreted_frame()) {
  54        frame::ijava_state* istate = ret_frame.get_ijava_state();
  55        if (!((Method*)(istate->method))->is_metaspace_object()) {
  56          return false;
  57        }
  58        uint64_t reg_bcp = uc->uc_mcontext.regs->gpr[14/*R14_bcp*/];
  59        uint64_t istate_bcp = istate->bcp;
  60        uint64_t code_start = (uint64_t)(((Method*)(istate->method))->code_base());
  61        uint64_t code_end = (uint64_t)(((Method*)istate->method)->code_base() + ((Method*)istate->method)->code_size());
  62        if (istate_bcp >= code_start && istate_bcp < code_end) {
  63          // we have a valid bcp, don't touch it, do nothing
  64        } else if (reg_bcp >= code_start && reg_bcp < code_end) {
  65          istate->bcp = reg_bcp;
  66       } else {
  67          return false;
  68        }
  69     }
  70     if (!ret_frame.safe_for_sender(this)) {
  71       // nothing else to try if the frame isn't good
  72       return false;
  73     }
  74     *fr_addr = ret_frame;
  75     return true;
  76   }
  77   // nothing else to try
  78   return false;
  79 }
  80 
  81 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/PPC.
  82 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
  83   assert(this->is_Java_thread(), "must be JavaThread");
  84   return pd_get_top_frame_for_profiling(fr_addr, ucontext, isInJava);
  85 }
  86 
  87 void JavaThread::cache_global_variables() { }
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