Mercurial > hg > graal-jvmci-8
diff src/share/vm/runtime/thread.hpp @ 14394:58be756e7595
8017313: PPC64 (part 6): stack handling improvements
Summary: Precompute limit for stack overflow check.
Reviewed-by: kvn, coleenp
author | goetz |
---|---|
date | Mon, 24 Jun 2013 17:11:47 +0200 |
parents | f2110083203d |
children | 94c202aa2646 |
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--- a/src/share/vm/runtime/thread.hpp Thu Jun 27 13:04:51 2013 -0700 +++ b/src/share/vm/runtime/thread.hpp Mon Jun 24 17:11:47 2013 +0200 @@ -893,7 +893,11 @@ 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 @@ // 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 @@ 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 ); }