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base.bbclass: add lock file for do_unpack task 

This patch intend to fix the random unpack failure of linux-libc-headers-yocto
and linux-yocto.

The root cause of the unpack failure is that: these two recpies has the same URL, thus
has the same dest file during the fetch and unpack phase:
do_fetch  : create tar ball ${DL_DIR}/git_git.pokylinux.org.linux-yocto-2.6.37.tar.gz
do_unpack : extract tar ball ${DL_DIR}/git_git.pokylinux.org.linux-yocto-2.6.37.tar.gz
fetch phase is protected by lockfile, so it works fine. but unpack phase is not lock protected,
thus there is race condition like: when linux-yocto do_unpack is extracting the tar ball,
linux-libc-headers-yocto do_fetch starts to create tar ball thus overwrite linux-yocto's
tar ball and cause linux-yocto do_unpack failure

To fix this issue, do_unpack also need to be protected by lock

Signed-off-by: Yu Ke <ke.yu@intel.com>
This commit is contained in:
Yu Ke 2011-01-04 15:55:33 +08:00 committed by Saul Wold
parent ca148f4627
commit 30d27115ec
1 changed files with 4 additions and 0 deletions
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4
meta/classes/base.bbclass
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@ -242,6 +242,8 @@ python base_do_unpack() {
localdata = bb.data.createCopy(d)
bb.data.update_data(localdata)
urldata = bb.fetch.init([], localdata, True)
src_uri = bb.data.getVar('SRC_URI', localdata, True)
if not src_uri:
return
@ -253,7 +255,9 @@ python base_do_unpack() {
if local is None:
continue
local = os.path.realpath(local)
lf = bb.utils.lockfile(urldata[url].lockfile)
ret = oe_unpack_file(local, localdata, url)
bb.utils.unlockfile(lf)
if not ret:
raise bb.build.FuncFailed("oe_unpack_file failed with return value %s" % ret)
}