DescriptionReland of: Allow base to depend on allocator
Reason for reland:
Fix empty gyp target edge case, that caused the breakage.
Original CL: http://crrev.com/1584893002
Revert CL: http://crrev.com/1610673002
Breakage: https://build.chromium.org/p/chromium.mac/builders/iOS_Device/builds/35574
Original CL description:
> A smaller, yet key, step to move
>
> From: a situation where mainly executables (but not really) depend on
> allocator, and base needs dependencies (to tcmalloc) to be injected
> from content (which violates the ODR in component buids).
>
> To: a situation where only base depends on allocator and the other
> targets get recursively the required linked flags.
>
> In essence this CL is a more gradual approach to the bigger
> unreviewable crrev.com/1528013002.
>
> How is the transition handled?
> ------------------------------
> After this CL, the situation will be as follows:
> From a build time perspective base will also depend on allocator.
> This will not change anything substantial in static builds and introduce
> yet another (temporary) ODR violation in Linux component builds.
> The big change introduced by this CL is the fact that all the executable
> targets that depend on base (virtualy all) will also get another
> indirect dependency to allocator.
>
> In other words, after this CL executable targets will depend on
> allocator for two reasons:
> - Because they have an explicit dependency to it (the one I am going to
> get rid of in the immediate future).
> - Because this new transitive path I am introducing in base.
>
> Rationale of this approach
> --------------------------
> This allows to restrict the critical changes in a smaller CL easier to
> review, at the cost of the temporary double dependency on base.
> The good things are:
> - If something will break, this CL will be very easy to revert.
> - The next cleanups will be straightforward.
> - We have now smoke tests (crrev.com/1577883002) that will help us
> realize if something goes wrong.
>
> Next steps
> ----------
> In the next CLs I will:
> - Remove the content -> base injection layer, and let base directly use
> the tcmalloc functions it needs.
> - Remove all the traces of USE_TCMALLOC outside of base.
> - Start cleaning up the hundreds use_allocator conditionals in the gyp
> files in a way which is easier to review and produce zero ninja diffs
> (see crrev.com/1583973002 as an example)
>
> Ninja diffs caused by this change
> ---------------------------------
> ### Win, static build, GN: https://paste.ee/p/hvcRp
> The missing targets (mostly tests) that previously were
> not depending on allocator, now get that by virtue of the transitive
> dependency.
>
> ### Win, static build, GYP: https://paste.ee/p/AGuKR
> As above. Just GYP seems to emit the ninja files in a different,
> inlined, format.
>
> ### linux static build, GYP: https://paste.ee/p/kmD7U
> As above. Plus the new targets also get the -Wl,-u (keep symbol)
> args as expected by allocator.gyp for the tcmalloc heap profiler.
>
> ### linux shared build, GYP: https://paste.ee/p/FHHNR
> Nothing relevant. Just I moved the dependency to allocator from
> base_unittests to base, and that is the only thing that reflects in the
> ninja files.
>
> BUG=564618
TBR=wfh@chromium.org,brettw@chromium.org
BUG=564618
Committed: https://crrev.com/717238e9faac7bdd5a7a63fffdcee77e93d48e1f
Cr-Commit-Position: refs/heads/master@{#370438}
Patch Set 1 : Original CL #Patch Set 2 : This CL: fix gyp issues #
Total comments: 3
Dependent Patchsets: Messages
Total messages: 14 (5 generated)
|