Mercurial > hg > graal-compiler
annotate GRAAL_AUTHORS @ 11825:463f51256c86
AMD64HotSpot: emit jump to IC miss handler directly instead of emitting it inside verfied_entry
for empty methods we emitted something like this if a inline cache is needed:
prefix:
00: < IC check >
...
0b: jne <ic_miss_call>
11: nop
...
verified_entry:
20: ret
ic_miss_call:
21: jmp <entry of runtime function>
when a method is deoptimized, HotSpot patches the verified_entry (0x20) with a
jump to a stub that handles call-sites that has been made non-entrant. since this jump
is 5 bytes long, it will overwrite ic_miss_call and blow up every caller that
calls this method via the unverified entry (prefix).
the fix is to emit the jump to the runtime function inside the unverfied entry:
prefix:
00: < IC check >
...
0b: je <verified_entry>
11: jeq <entry of runtime function>
16: nop
...
verified_entry:
20: ret
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 30 Sep 2013 09:32:18 +0200 |
parents | e4019a78c938 |
children |
rev | line source |
---|---|
5569
af976ca29136
Added prototype implementation of Java bytecode interpreter - contribution by Christian Humer (chumer).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3735
diff
changeset
|
1 Gilles Duboscq (gdub) |
af976ca29136
Added prototype implementation of Java bytecode interpreter - contribution by Christian Humer (chumer).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3735
diff
changeset
|
2 Peter Hofer |
8267 | 3 Christian Haeubl (chaeubl) |
4 Christian Humer (chumer) | |
5 Roland Schatz | |
6 Doug Simon (dnsimon) | |
7 Lukas Stadler (lstadler) | |
5766 | 8 Alexander Stipsits |
9 Katrin Strassl | |
5569
af976ca29136
Added prototype implementation of Java bytecode interpreter - contribution by Christian Humer (chumer).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3735
diff
changeset
|
10 Christian Wimmer (cwimmer) |
8267 | 11 Andreas Woess (aw) |
5569
af976ca29136
Added prototype implementation of Java bytecode interpreter - contribution by Christian Humer (chumer).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3735
diff
changeset
|
12 Thomas Wuerthinger (thomaswue) |