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src/os_cpu/aix_ppc/vm/os_aix_ppc.cpp

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rev 12363 : 8169373: Work around linux NPTL stack guard error.
Summary: Also skip libc guard page for compiler thread, merge similar code on linux platforms, and streamline libc guard page handling on linuxs390, linuxppc, aixppc.
Reviewed-by: dholmes, dcubed, kvn


 518   sigthreadmask(SIG_UNBLOCK, &newset, NULL);
 519 
 520   VMError::report_and_die(t, sig, pc, info, ucVoid);
 521 
 522   ShouldNotReachHere();
 523   return 0;
 524 }
 525 
 526 void os::Aix::init_thread_fpu_state(void) {
 527 #if !defined(USE_XLC_BUILTINS)
 528   // Disable FP exceptions.
 529   __asm__ __volatile__ ("mtfsfi 6,0");
 530 #else
 531   __mtfsfi(6, 0);
 532 #endif
 533 }
 534 
 535 ////////////////////////////////////////////////////////////////////////////////
 536 // thread stack
 537 
 538 size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
 539 size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;


 540 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 541 
 542 // return default stack size for thr_type
 543 size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
 544   // default stack size (compiler thread needs larger stack)
 545   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
 546   return s;
 547 }
 548 
 549 /////////////////////////////////////////////////////////////////////////////
 550 // helper functions for fatal error handler
 551 
 552 void os::print_context(outputStream *st, const void *context) {
 553   if (context == NULL) return;
 554 
 555   const ucontext_t* uc = (const ucontext_t*)context;
 556 
 557   st->print_cr("Registers:");
 558   st->print("pc =" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.iar);
 559   st->print("lr =" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.lr);
 560   st->print("ctr=" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.ctr);
 561   st->cr();
 562   for (int i = 0; i < 32; i++) {
 563     st->print("r%-2d=" INTPTR_FORMAT "  ", i, uc->uc_mcontext.jmp_context.gpr[i]);
 564     if (i % 3 == 2) st->cr();




 518   sigthreadmask(SIG_UNBLOCK, &newset, NULL);
 519 
 520   VMError::report_and_die(t, sig, pc, info, ucVoid);
 521 
 522   ShouldNotReachHere();
 523   return 0;
 524 }
 525 
 526 void os::Aix::init_thread_fpu_state(void) {
 527 #if !defined(USE_XLC_BUILTINS)
 528   // Disable FP exceptions.
 529   __asm__ __volatile__ ("mtfsfi 6,0");
 530 #else
 531   __mtfsfi(6, 0);
 532 #endif
 533 }
 534 
 535 ////////////////////////////////////////////////////////////////////////////////
 536 // thread stack
 537 
 538 // These sizes exclude libc stack guard pages, but include
 539 // the HotSpot guard pages.
 540 size_t os::Posix::_compiler_thread_min_stack_allowed = 512 * K;
 541 size_t os::Posix::_java_thread_min_stack_allowed = 512 * K;
 542 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 543 
 544 // Return default stack size for thr_type.
 545 size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
 546   // Default stack size (compiler thread needs larger stack).
 547   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
 548   return s;
 549 }
 550 
 551 /////////////////////////////////////////////////////////////////////////////
 552 // helper functions for fatal error handler
 553 
 554 void os::print_context(outputStream *st, const void *context) {
 555   if (context == NULL) return;
 556 
 557   const ucontext_t* uc = (const ucontext_t*)context;
 558 
 559   st->print_cr("Registers:");
 560   st->print("pc =" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.iar);
 561   st->print("lr =" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.lr);
 562   st->print("ctr=" INTPTR_FORMAT "  ", uc->uc_mcontext.jmp_context.ctr);
 563   st->cr();
 564   for (int i = 0; i < 32; i++) {
 565     st->print("r%-2d=" INTPTR_FORMAT "  ", i, uc->uc_mcontext.jmp_context.gpr[i]);
 566     if (i % 3 == 2) st->cr();


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