r357713 - Verify that Android targets generate DWARF 4 by default.

Stephen Hines via cfe-commits cfe-commits at lists.llvm.org
Thu Apr 4 18:32:38 PDT 2019


Ah I just saw this. Please feel free to CC me on the fix CL and I will
approve it. I didn't realize that the exact specification was missing
for that.

Thanks,
Steve

On Thu, Apr 4, 2019 at 6:31 PM Alex L <arphaman at gmail.com> wrote:
>
> Thanks, for the explanation, it makes sense. It looks like an explicit `darwin14` in one of the non-versioned darwin triples fixes the issue. I will commit the fix right away.
>
> Cheers,
> Alex
>
>
> On Thu, 4 Apr 2019 at 18:24, Adrian Prantl <aprantl at apple.com> wrote:
>>
>> IIRC, the dwarf version on Darwin depends on the deployment target and is 2 for earlier versions of macOS and and 4 for newer ones (I need to dig through the driver code to determine the exact version).
>>
>> I can take a look at this tomorrow morning.
>>
>> -- adrian
>>
>> On Apr 4, 2019, at 6:21 PM, Alex L <arphaman at gmail.com> wrote:
>>
>> Hi Stephen,
>>
>> It looks like your change has caused the 'debug-options.c' test to start failing on Darwin. It looks like we emit "-dwarf-version=4" by default, and not 2. Could you please take a look.
>>
>> Here's a link to a latest build on the public LLVM CI that contains the failure:
>> http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental/59772/console
>>
>> Here's the failure itself:
>> Command Output (stderr): -- /Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/llvm/tools/clang/test/Driver/debug-options.c:280:14: error: G_DWARF2: expected string not found in input // G_DWARF2: "-dwarf-version=2" ^ <stdin>:5:515: note: scanning from here "/Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/clang-build/bin/clang-9" "-cc1" "-triple" "x86_64-apple-macosx10.13.0" "-Wdeprecated-objc-isa-usage" "-Werror=deprecated-objc-isa-usage" "-emit-obj" "-mrelax-all" "-disable-free" "-main-file-name" "debug-options.c" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix" "-mdisable-fp-elim" "-masm-verbose" "-munwind-tables" "-faligned-alloc-unavailable" "-target-cpu" "penryn" "-dwarf-column-info" "-debug-info-kind=standalone" "-dwarf-version=4" "-debugger-tuning=lldb" "-ggnu-pubnames" "-target-linker-version" "351.8" "-coverage-notes-file" "/Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/clang-build/tools/clang/test/Driver/debug-options.gcno" "-resource-dir" "/Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/clang-build/lib/clang/9.0.0" "-fdebug-compilation-dir" "/Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/clang-build/tools/clang/test/Driver" "-ferror-limit" "19" "-fmessage-length" "0" "-stack-protector" "1" "-fblocks" "-fencode-extended-block-signature" "-fregister-global-dtors-with-atexit" "-fobjc-runtime=macosx-10.13.0" "-fmax-type-align=16" "-fdiagnostics-show-option" "-o" "debug-options.o" "-x" "c" "/Users/buildslave/jenkins/workspace/clang-stage1-cmake-RA-incremental/llvm/tools/clang/test/Driver/debug-options.c" ^
>>
>>
>> Adrian, I've looped you in since you reviewed the commit it looks like. Do you know if that's expected behavior on Darwin?
>>
>> Cheers,
>> Alex
>>
>> On Thu, 4 Apr 2019 at 11:16, Stephen Hines via cfe-commits <cfe-commits at lists.llvm.org> wrote:
>>>
>>> Author: srhines
>>> Date: Thu Apr  4 11:17:46 2019
>>> New Revision: 357713
>>>
>>> URL: http://llvm.org/viewvc/llvm-project?rev=357713&view=rev
>>> Log:
>>> Verify that Android targets generate DWARF 4 by default.
>>>
>>> Summary:
>>> In the future, Android releases will support DWARF 5, but we need to
>>> ensure that older targets only have DWARF 4 generated for them. This
>>> patch inserts that verification for all Android releases now. The patch
>>> also fixes 2 minor mistakes (a mistakenly moved RUN line, and the
>>> missing G_DWARF2 check label).
>>>
>>> Reviewers: aprantl
>>>
>>> Reviewed By: aprantl
>>>
>>> Subscribers: chh, pirama, cfe-commits
>>>
>>> Tags: #clang
>>>
>>> Differential Revision: https://reviews.llvm.org/D60238
>>>
>>> Modified:
>>>     cfe/trunk/test/Driver/debug-options.c
>>>
>>> Modified: cfe/trunk/test/Driver/debug-options.c
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/debug-options.c?rev=357713&r1=357712&r2=357713&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/Driver/debug-options.c (original)
>>> +++ cfe/trunk/test/Driver/debug-options.c Thu Apr  4 11:17:46 2019
>>> @@ -17,9 +17,14 @@
>>>  // RUN: %clang -### -c -glldb %s -target x86_64-linux-gnu 2>&1 \
>>>  // RUN:             | FileCheck -check-prefix=G -check-prefix=G_LLDB %s
>>>  // RUN: %clang -### -c -gsce %s -target x86_64-linux-gnu 2>&1 \
>>> +// RUN:             | FileCheck -check-prefix=G -check-prefix=G_SCE %s
>>> +
>>> +// Android.
>>> +// Android should always generate DWARF4.
>>> +// RUN: %clang -### -c -g %s -target arm-linux-androideabi 2>&1 \
>>> +// RUN:             | FileCheck -check-prefix=G -check-prefix=G_DWARF4 %s
>>>
>>>  // Darwin.
>>> -// RUN:             | FileCheck -check-prefix=G -check-prefix=G_SCE %s
>>>  // RUN: %clang -### -c -g %s -target x86_64-apple-darwin 2>&1 \
>>>  // RUN:             | FileCheck -check-prefix=G_STANDALONE \
>>>  // RUN:                         -check-prefix=G_DWARF2 \
>>> @@ -272,6 +277,7 @@
>>>  //
>>>  // G_STANDALONE: "-cc1"
>>>  // G_STANDALONE: "-debug-info-kind=standalone"
>>> +// G_DWARF2: "-dwarf-version=2"
>>>  // G_DWARF4: "-dwarf-version=4"
>>>  //
>>>  // G_GDB:  "-debugger-tuning=gdb"
>>>
>>>
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>>
>>


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