114782 2013-04-17 20:04:00 -0700 JSC: Workaround limited jump range on some CPU architectures 2013-04-17 20:16:58 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 mark.lam mark.lam ddkilzer fpizlo ggaren jbriance mhahnenberg msaboff oliver oldest_to_newest 877675 0 mark.lam 2013-04-17 20:04:00 -0700 My recent change in https://bugs.webkit.org/show_bug.cgi?id=114577 introduced a "btpnz" to a branch target that is out of reach for some CPU architectures. In this case, it's simple enough to introduce the use of a jump island, and that saves us from having to change a whole bunch of CPU specific code. It works out to be a more optimal too. Patch coming soon. 877676 1 198672 mark.lam 2013-04-17 20:07:31 -0700 Created attachment 198672 the fix. 877677 2 198672 ddkilzer 2013-04-17 20:13:14 -0700 Comment on attachment 198672 the fix. r=me with help from Mark to make sure I understood the change. 877679 3 mark.lam 2013-04-17 20:16:58 -0700 Thanks for the review. Landed in r148655: <http://trac.webkit.org/changeset/148655>. 198672 2013-04-17 20:07:31 -0700 2013-04-17 20:13:14 -0700 the fix. bug-114782.patch text/plain 2763 mark.lam SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTQ4NjU0KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDE0IEBA CisyMDEzLTA0LTE3ICBNYXJrIExhbSAgPG1hcmsubGFtQGFwcGxlLmNvbT4KKworICAgICAgICBB dm9pZCB1c2luZyBhIGJyYW5jaCByYW5nZSB0aGF0IGlzIHRvbyBmYXIgZm9yIHNvbWUgQ1BVIGFy Y2hpdGVjdHVyZXMuCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNn aT9pZD0xMTQ3ODIuCisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAg ICAgICAgKiBsbGludC9Mb3dMZXZlbEludGVycHJldGVyLmFzbToKKyAgICAgICAgKiBsbGludC9M b3dMZXZlbEludGVycHJldGVyMzJfNjQuYXNtOgorICAgICAgICAqIGxsaW50L0xvd0xldmVsSW50 ZXJwcmV0ZXI2NC5hc206CisKIDIwMTMtMDQtMTcgIEp1bGllbiBCcmlhbmNlYXUgIDxqYnJpYW5j ZWF1QG5kcy5jb20+CiAKICAgICAgICAgRml4IFNINCBidWlsZCAoYnJva2VuIHNpbmNlIHIxNDg2 MzkpLgpJbmRleDogU291cmNlL0phdmFTY3JpcHRDb3JlL2xsaW50L0xvd0xldmVsSW50ZXJwcmV0 ZXIzMl82NC5hc20KPT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291cmNlL0phdmFTY3JpcHRDb3JlL2xsaW50L0xv d0xldmVsSW50ZXJwcmV0ZXIzMl82NC5hc20JKHJldmlzaW9uIDE0ODY1NCkKKysrIFNvdXJjZS9K YXZhU2NyaXB0Q29yZS9sbGludC9Mb3dMZXZlbEludGVycHJldGVyMzJfNjQuYXNtCSh3b3JraW5n IGNvcHkpCkBAIC0xODUsMTEgKzE4NSwxMSBAQCBtYWNybyBjYWxsQ2FsbFNsb3dQYXRoKGFkdmFu Y2UsIHNsb3dQYXRoCiAgICAgYWN0aW9uKHQwKQogZW5kCiAKLW1hY3JvIGNhbGxXYXRjaGRvZ1Rp bWVySGFuZGxlcigpCittYWNybyBjYWxsV2F0Y2hkb2dUaW1lckhhbmRsZXIodGhyb3dIYW5kbGVy KQogICAgIHN0b3JlaSBQQywgQXJndW1lbnRDb3VudCArIFRhZ09mZnNldFtjZnJdCiAgICAgY0Nh bGwyKF9sbGludF9zbG93X3BhdGhfaGFuZGxlX3dhdGNoZG9nX3RpbWVyLCBjZnIsIFBDKQogICAg IG1vdmUgdDEsIGNmcgotICAgIGJ0cG56IHQwLCBfbGxpbnRfdGhyb3dfZnJvbV9zbG93X3BhdGhf dHJhbXBvbGluZQorICAgIGJ0cG56IHQwLCB0aHJvd0hhbmRsZXIKICAgICBsb2FkaSBBcmd1bWVu dENvdW50ICsgVGFnT2Zmc2V0W2Nmcl0sIFBDCiBlbmQKIApJbmRleDogU291cmNlL0phdmFTY3Jp cHRDb3JlL2xsaW50L0xvd0xldmVsSW50ZXJwcmV0ZXI2NC5hc20KPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL2xsaW50L0xvd0xldmVsSW50ZXJwcmV0ZXI2NC5hc20JKHJldmlz aW9uIDE0ODY1NCkKKysrIFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9sbGludC9Mb3dMZXZlbEludGVy cHJldGVyNjQuYXNtCSh3b3JraW5nIGNvcHkpCkBAIC0xMjYsMTIgKzEyNiwxMiBAQCBtYWNybyBj YWxsQ2FsbFNsb3dQYXRoKGFkdmFuY2UsIHNsb3dQYXRoCiAgICAgYWN0aW9uKHQwKQogZW5kCiAK LW1hY3JvIGNhbGxXYXRjaGRvZ1RpbWVySGFuZGxlcigpCittYWNybyBjYWxsV2F0Y2hkb2dUaW1l ckhhbmRsZXIodGhyb3dIYW5kbGVyKQogICAgIHN0b3JlaSBQQywgQXJndW1lbnRDb3VudCArIFRh Z09mZnNldFtjZnJdCiAgICAgcHJlcGFyZVN0YXRlRm9yQ0NhbGwoKQogICAgIGNDYWxsMihfbGxp bnRfc2xvd19wYXRoX2hhbmRsZV93YXRjaGRvZ190aW1lciwgY2ZyLCBQQykKICAgICBtb3ZlIHQx LCBjZnIKLSAgICBidHBueiB0MCwgX2xsaW50X3Rocm93X2Zyb21fc2xvd19wYXRoX3RyYW1wb2xp bmUKKyAgICBidHBueiB0MCwgdGhyb3dIYW5kbGVyCiAgICAgbW92ZSB0MywgUEIKICAgICBsb2Fk aSBBcmd1bWVudENvdW50ICsgVGFnT2Zmc2V0W2Nmcl0sIFBDCiBlbmQKSW5kZXg6IFNvdXJjZS9K YXZhU2NyaXB0Q29yZS9sbGludC9Mb3dMZXZlbEludGVycHJldGVyLmFzbQo9PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0t LSBTb3VyY2UvSmF2YVNjcmlwdENvcmUvbGxpbnQvTG93TGV2ZWxJbnRlcnByZXRlci5hc20JKHJl dmlzaW9uIDE0ODY1NCkKKysrIFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9sbGludC9Mb3dMZXZlbElu dGVycHJldGVyLmFzbQkod29ya2luZyBjb3B5KQpAQCAtMTA2NCw4ICsxMDY0LDEwIEBAIF9sbGlu dF9vcF9sb29wX2hpbnQ6CiAgICAgY2hlY2tTd2l0Y2hUb0pJVEZvckxvb3AoKQogICAgIGRpc3Bh dGNoKDEpCiAuaGFuZGxlV2F0Y2hkb2dUaW1lcjoKLSAgICBjYWxsV2F0Y2hkb2dUaW1lckhhbmRs ZXIoKQorICAgIGNhbGxXYXRjaGRvZ1RpbWVySGFuZGxlcigudGhyb3dIYW5kbGVyKQogICAgIGpt cCAuYWZ0ZXJXYXRjaGRvZ1RpbWVyQ2hlY2sKKy50aHJvd0hhbmRsZXI6CisgICAgam1wIF9sbGlu dF90aHJvd19mcm9tX3Nsb3dfcGF0aF90cmFtcG9saW5lCiAKIF9sbGludF9vcF9zd2l0Y2hfc3Ry aW5nOgogICAgIHRyYWNlRXhlY3V0aW9uKCkK