src/hotspot/os_cpu/linux_ppc/os_linux_ppc.cpp

rev 48556 : 8196401: PPC64+s390: get_frame_at_stack_banging_point uses wrong PC
Reviewed-by:

*** 118,127 ****
--- 118,131 ----
  void os::Linux::ucontext_set_pc(ucontext_t * uc, address pc) {
    guarantee(uc->uc_mcontext.regs != NULL, "only use ucontext_set_pc in sigaction context");
    uc->uc_mcontext.regs->nip = (unsigned long)pc;
  }
  
+ address ucontext_get_lr(const ucontext_t * uc) {
+   return (address)uc->uc_mcontext.regs->link;
+ }
+ 
  intptr_t* os::Linux::ucontext_get_sp(const ucontext_t * uc) {
    return (intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/];
  }
  
  intptr_t* os::Linux::ucontext_get_fp(const ucontext_t * uc) {
*** 175,187 ****
        // Not sure where the pc points to, fallback to default
        // stack overflow handling. In compiled code, we bang before
        // the frame is complete.
        return false;
      } else {
-       intptr_t* fp = os::Linux::ucontext_get_fp(uc);
        intptr_t* sp = os::Linux::ucontext_get_sp(uc);
!       *fr = frame(sp, (address)*sp);
        if (!fr->is_java_frame()) {
          assert(fr->safe_for_sender(thread), "Safety check");
          assert(!fr->is_first_frame(), "Safety check");
          *fr = fr->java_sender();
        }
--- 179,191 ----
        // Not sure where the pc points to, fallback to default
        // stack overflow handling. In compiled code, we bang before
        // the frame is complete.
        return false;
      } else {
        intptr_t* sp = os::Linux::ucontext_get_sp(uc);
!       address lr = ucontext_get_lr(uc);
!       *fr = frame(sp, lr);
        if (!fr->is_java_frame()) {
          assert(fr->safe_for_sender(thread), "Safety check");
          assert(!fr->is_first_frame(), "Safety check");
          *fr = fr->java_sender();
        }