On 01/06/2014 08:25 PM, Richard Purdie wrote:
On Thu, 2013-11-14 at 18:51 +0800, Ming Liu wrote:

This patch mainly aims to add optimisation for crosssdk setscene dependency
validating which we haven't handled in current logic, and which I think we
could have as we've already implemented to native/cross, although there
are albeit not many crossdk tasks, we could still get some performance
enhancement.

And it also fix a vulnerability of some certain workflow, think about the
following scenario with current logic:
    bitbake nativesdk-eglibc-initial -c cleansstate
    bitbake gcc-crosssdk-initial -c clean
    bitbake gmp-native -c clean
    bitbake libmpc-native -c clean
    bitbake mpfr-native -c clean
    bitbake gcc-crosssdk-initial
    bitbake nativesdk-eglibc-initial

Aboving will fail for absence of a few native libraries required by
gcc-crosssdk-initial.

Also modified some places in current code except the optimisation, as
following:
1 Remove isNative function since no code is referring it.
2 Add do_package to the list that don't exist and are noexec.

I've split this patch up as its doing too many things at once. In
particular, I think we should keep the "isNativeCross()" function name
instead of adding Crosssdk to the name since it just makes things more
confusing to read.
I am on board with your comments.
 

I've take a part for the crosssdk part in master-next which is being
tested at the moment, can you resent the do_package part by itself
please?
No problem, I will resend a patch soon with modifying the do_package part only.


I don't quite understand how the sequence of commands above breaks
things or how this patch fixes it. Are you sure this wasn't fixed by:

http://git.yoctoproject.org/cgit.cgi/poky-contrib/commit/?h=ciorga/PUs&id=1dcbf3096d7d42032faade96dae89c25a4feca7a

which would be the real bug?
I am pretty sure they are NOT the same issue. The 1dcbf309 is about to fix gcc-crosssdk lacking its dependencies in bb, while in this case, it's due to some other setscene tasks(populate_sysroot) depended by gcc-crosssdk-initial's setscene task(populate_sysroot) were not validated correctly, without the modification to isNativeCross, the setscene_depvalid will return TRUE through:
......
            # Native/Cross populate_sysroot need their dependencies
            if isNativeCross(taskdependees[task][0]) and isNativeCross(taskdependees[dep][0]):
                return False
            # Target populate_sysroot depended on by cross tools need to be installed
            if isNativeCross(taskdependees[dep][0]):
                return False
            # Native/cross tools depended upon by target sysroot are not needed
            if isNativeCross(taskdependees[task][0]):
                continue
......
    return True
......

for example, when the task is 'gmp-native', and the dep is 'gcc-crosssdk-initial', it is absolutely wrong for gcc-crosssdk-initial needs its dependencies like gmp-native, libmpc-native, mpfr-native to be present in sysroot or its binaries will fail to be executed.

However, by double-checked the patch, I found that it had introduced a regression that binutils-crosssdk should not be added into safe dep list for it's in the DEPENDS of gcc-crosssdk-initial, I will send a fix for it too.

//Ming Liu

Cheers,

Richard