Mercurial > hg > graal-jvmci-8
diff src/share/vm/interpreter/bytecodeStream.hpp @ 726:be93aad57795
6655646: dynamic languages need dynamically linked call sites
Summary: invokedynamic instruction (JSR 292 RI)
Reviewed-by: twisti, never
| author | jrose |
|---|---|
| date | Tue, 21 Apr 2009 23:21:04 -0700 |
| parents | a61af66fc99e |
| children | bd02caa94611 |
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--- a/src/share/vm/interpreter/bytecodeStream.hpp Mon Apr 20 14:48:03 2009 -0700 +++ b/src/share/vm/interpreter/bytecodeStream.hpp Tue Apr 21 23:21:04 2009 -0700 @@ -109,6 +109,7 @@ Bytecodes::Code code() const { return _code; } bool is_wide() const { return _is_wide; } + int instruction_size() const { return (_next_bci - _bci); } bool is_last_bytecode() const { return _next_bci >= _end_bci; } address bcp() const { return method()->code_base() + _bci; } @@ -122,8 +123,29 @@ int dest_w() const { return bci() + (int )Bytes::get_Java_u4(bcp() + 1); } // Unsigned indices, widening - int get_index() const { return (is_wide()) ? Bytes::get_Java_u2(bcp() + 2) : bcp()[1]; } - int get_index_big() const { return (int)Bytes::get_Java_u2(bcp() + 1); } + int get_index() const { assert_index_size(is_wide() ? 2 : 1); + return (is_wide()) ? Bytes::get_Java_u2(bcp() + 2) : bcp()[1]; } + int get_index_big() const { assert_index_size(2); + return (int)Bytes::get_Java_u2(bcp() + 1); } + int get_index_int() const { return has_giant_index() ? get_index_giant() : get_index_big(); } + int get_index_giant() const { assert_index_size(4); return Bytes::get_native_u4(bcp() + 1); } + int has_giant_index() const { return (code() == Bytecodes::_invokedynamic); } + + private: + void assert_index_size(int required_size) const { +#ifdef ASSERT + int isize = instruction_size() - (int)_is_wide - 1; + if (isize == 2 && code() == Bytecodes::_iinc) + isize = 1; + else if (isize <= 2) + ; // no change + else if (has_giant_index()) + isize = 4; + else + isize = 2; + assert(isize = required_size, "wrong index size"); +#endif + } }; // In BytecodeStream, non-java bytecodes will be translated into the