Mercurial > hg > graal-jvmci-8
diff src/share/vm/oops/constMethodOop.cpp @ 6213:8150fa46d2ed
7178145: Change constMethodOop::_exception_table to optionally inlined u2 table.
Summary: Change constMethodOop::_exception_table to optionally inlined u2 table.
Reviewed-by: bdelsart, coleenp, kamg
author | jiangli |
---|---|
date | Tue, 26 Jun 2012 19:08:44 -0400 |
parents | 2fe087c3e814 |
children |
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line diff
--- a/src/share/vm/oops/constMethodOop.cpp Mon Jun 25 15:34:06 2012 -0400 +++ b/src/share/vm/oops/constMethodOop.cpp Tue Jun 26 19:08:44 2012 -0400 @@ -35,6 +35,7 @@ int constMethodOopDesc::object_size(int code_size, int compressed_line_number_size, int local_variable_table_length, + int exception_table_length, int checked_exceptions_length) { int extra_bytes = code_size; if (compressed_line_number_size > 0) { @@ -49,6 +50,10 @@ extra_bytes += local_variable_table_length * sizeof(LocalVariableTableElement); } + if (exception_table_length > 0) { + extra_bytes += sizeof(u2); + extra_bytes += exception_table_length * sizeof(ExceptionTableElement); + } int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; return align_object_size(header_size() + extra_words); } @@ -73,23 +78,40 @@ return last_u2_element(); } -u2* constMethodOopDesc::localvariable_table_length_addr() const { - assert(has_localvariable_table(), "called only if table is present"); +u2* constMethodOopDesc::exception_table_length_addr() const { + assert(has_exception_handler(), "called only if table is present"); if (has_checked_exceptions()) { // If checked_exception present, locate immediately before them. return (u2*) checked_exceptions_start() - 1; } else { - // Else, the linenumber table is at the end of the constMethod. + // Else, the exception table is at the end of the constMethod. return last_u2_element(); } } +u2* constMethodOopDesc::localvariable_table_length_addr() const { + assert(has_localvariable_table(), "called only if table is present"); + if (has_exception_handler()) { + // If exception_table present, locate immediately before them. + return (u2*) exception_table_start() - 1; + } else { + if (has_checked_exceptions()) { + // If checked_exception present, locate immediately before them. + return (u2*) checked_exceptions_start() - 1; + } else { + // Else, the linenumber table is at the end of the constMethod. + return last_u2_element(); + } + } +} + // Update the flags to indicate the presence of these optional fields. void constMethodOopDesc::set_inlined_tables_length( int checked_exceptions_len, int compressed_line_number_size, - int localvariable_table_len) { + int localvariable_table_len, + int exception_table_len) { // Must be done in the order below, otherwise length_addr accessors // will not work. Only set bit in header if length is positive. assert(_flags == 0, "Error"); @@ -100,6 +122,10 @@ _flags |= _has_checked_exceptions; *(checked_exceptions_length_addr()) = checked_exceptions_len; } + if (exception_table_len > 0) { + _flags |= _has_exception_table; + *(exception_table_length_addr()) = exception_table_len; + } if (localvariable_table_len > 0) { _flags |= _has_localvariable_table; *(localvariable_table_length_addr()) = localvariable_table_len; @@ -133,3 +159,15 @@ addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); return (LocalVariableTableElement*) addr; } + +int constMethodOopDesc::exception_table_length() const { + return has_exception_handler() ? *(exception_table_length_addr()) : 0; +} + +ExceptionTableElement* constMethodOopDesc::exception_table_start() const { + u2* addr = exception_table_length_addr(); + u2 length = *addr; + assert(length > 0, "should only be called if table is present"); + addr -= length * sizeof(ExceptionTableElement) / sizeof(u2); + return (ExceptionTableElement*)addr; +}