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[lld-macho] Simplify the handling of "no unwind info" functions

Authored by int3 on Sep 16 2021, 8:36 PM.



This diff does away with addEntriesForFunctionsWithoutUnwindInfo(),
because addSymbol() can now determine which functions need those

While overhauling UnwindInfoSection, I also parallelized the relocation
of the contents of the CUEs. This somewhat offsets the time regression
from creating one InputSection per CUE (which was done in D109944).

Diff Detail

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int3 created this revision.Sep 16 2021, 8:36 PM
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int3 requested review of this revision.Sep 16 2021, 8:36 PM
Herald added a project: Restricted Project. · View Herald TranscriptSep 16 2021, 8:36 PM
oontvoo added inline comments.

Please include the explanation on why we're doing this (for eg., "because we'll use it with parallelForEachN" )

(or perhaps move this comment to the symbols's decl statement.)


this never changes - would be nice to have it fixed somewhere rather than having to re-type it in a few places

int3 updated this revision to Diff 373361.Sep 17 2021, 4:21 PM
int3 marked an inline comment as done.

elaborate on comment


If we end up using it in multiple places, sure

oontvoo accepted this revision.Sep 17 2021, 6:55 PM


This revision is now accepted and ready to land.Sep 17 2021, 6:55 PM
This revision was landed with ongoing or failed builds.Oct 26 2021, 1:04 PM
This revision was automatically updated to reflect the committed changes.

I think this may have broken: lld/test/MachO/invalid/compact-unwind-bad-reloc.s?

: 'RUN: at line 2';   /android0/llvm-project/llvm/build/bin/llvm-mc -filetype=obj -triple=x86_64-apple-darwin19.0.0 /android0/llvm-project/lld/test/MachO/invalid/compact-unwind-bad-reloc.s -o /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o
: 'RUN: at line 3';   not ld64.lld -arch x86_64 -platform_version macos 10.15 11.0 -syslibroot /android0/llvm-project/lld/test/MachO/Inputs/MacOSX.sdk -fatal_warnings -pie -lSystem -lc++ /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o -o /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp 2>&1 | /android0/llvm-project/llvm/build/bin/FileCheck /android0/llvm-project/lld/test/MachO/invalid/compact-unwind-bad-reloc.s -DFILE=/android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o
Exit Code: 2

Command Output (stderr):
+ : 'RUN: at line 2'
+ /android0/llvm-project/llvm/build/bin/llvm-mc -filetype=obj -triple=x86_64-apple-darwin19.0.0 /android0/llvm-project/lld/test/MachO/invalid/compact-unwind-bad-reloc.s -o /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o
+ : 'RUN: at line 3'
+ not ld64.lld -arch x86_64 -platform_version macos 10.15 11.0 -syslibroot /android0/llvm-project/lld/test/MachO/Inputs/MacOSX.sdk -fatal_warnings -pie -lSystem -lc++ /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o -o /android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp
+ /android0/llvm-project/llvm/build/bin/FileCheck /android0/llvm-project/lld/test/MachO/invalid/compact-unwind-bad-reloc.s -DFILE=/android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /android0/llvm-project/llvm/build/bin/FileCheck /android0/llvm-project/lld/test/MachO/invalid/compact-unwind-bad-reloc.s -DFILE=/android0/llvm-project/llvm/build/tools/lld/test/MachO/invalid/Output/compact-unwind-bad-reloc.s.tmp.o