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6706829: Compressed Oops: add debug info for narrow oops

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Add support for narrow oops in debug info to avoid decoding.

Reviewed-by: rasbold, never
This commit is contained in:
Vladimir Kozlov 2008-09-10 18:23:32 -07:00
parent 63c98ed888
commit 659ca734bb
11 changed files with 169 additions and 48 deletions
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11
hotspot/src/share/vm/code/location.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -26,7 +26,7 @@
#include "incls/_location.cpp.incl"
void Location::print_on(outputStream* st) const {
if(type() == invalid && !legal_offset_in_bytes(offset() * BytesPerInt)) {
if(type() == invalid) {
// product of Location::invalid_loc() or Location::Location().
switch (where()) {
case on_stack: st->print("empty"); break;
@ -42,6 +42,7 @@ void Location::print_on(outputStream* st) const {
switch (type()) {
case normal: break;
case oop: st->print(",oop"); break;
case narrowoop: st->print(",narrowoop"); break;
case int_in_long: st->print(",int"); break;
case lng: st->print(",long"); break;
case float_in_dbl: st->print(",float"); break;
@ -53,17 +54,17 @@ void Location::print_on(outputStream* st) const {
Location::Location(DebugInfoReadStream* stream) {
_value = (uint16_t) stream->read_int();
_value = (juint) stream->read_int();
}
void Location::write_on(DebugInfoWriteStream* stream) {
stream->write_int(_value & 0x0000FFFF);
stream->write_int(_value);
}
// Valid argument to Location::new_stk_loc()?
bool Location::legal_offset_in_bytes(int offset_in_bytes) {
if ((offset_in_bytes % BytesPerInt) != 0) return false;
return (offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);
return (juint)(offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);
}