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8017313: PPC64 (part 6): stack handling improvements

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Precompute limit for stack overflow check.

Reviewed-by: kvn, coleenp
This commit is contained in:
Goetz Lindenmaier 2013-06-24 17:11:47 +02:00
parent 7509ebea00
commit ac0c6f1e84
2 changed files with 17 additions and 1 deletions
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3
hotspot/src/share/vm/runtime/thread.cpp
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@ -312,6 +312,9 @@ void Thread::initialize_thread_local_storage() {
void Thread::record_stack_base_and_size() {
set_stack_base(os::current_stack_base());
set_stack_size(os::current_stack_size());
if (is_Java_thread()) {
((JavaThread*) this)->set_stack_overflow_limit();
}
// CR 7190089: on Solaris, primordial thread's stack is adjusted
// in initialize_thread(). Without the adjustment, stack size is
// incorrect if stack is set to unlimited (ulimit -s unlimited).

15
hotspot/src/share/vm/runtime/thread.hpp
View File

@ -893,7 +893,11 @@ class JavaThread: public Thread {
private:
StackGuardState _stack_guard_state;
StackGuardState _stack_guard_state;
// Precompute the limit of the stack as used in stack overflow checks.
// We load it from here to simplify the stack overflow check in assembly.
address _stack_overflow_limit;
// Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is
// used to temp. parsing values into and out of the runtime system during exception handling for compiled
@ -1301,6 +1305,14 @@ class JavaThread: public Thread {
// and reguard if possible.
bool reguard_stack(void);
address stack_overflow_limit() { return _stack_overflow_limit; }
void set_stack_overflow_limit() {
_stack_overflow_limit = _stack_base - _stack_size +
((StackShadowPages +
StackYellowPages +
StackRedPages) * os::vm_page_size());
}
// Misc. accessors/mutators
void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; }
void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; }
@ -1335,6 +1347,7 @@ class JavaThread: public Thread {
static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); }
static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); }
static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); }
static ByteSize stack_overflow_limit_offset() { return byte_offset_of(JavaThread, _stack_overflow_limit); }
static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); }
static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); }
static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); }