Re: Troubles building world on stable/13

On Fri, Jan 21, 2022 at 11:14:32PM -0800, Mark Millard wrote:
> > On 2022-Jan-20, at 22:00, Mark Millard <[email protected]> wrote:
> > 
> 
> It does no good for me since I do not get a failure,
> but you might try (instead of exectuing the .sh file)
> (I used \'s to split the huge line):
> 
> lldb -- "/usr/bin/c++" "-cc1" "-triple" "aarch64-unknown-freebsd13.0" "-emit-obj" "--mrelax-relocations" \
> "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "gmock_main.cc" \
> "-mrelocation-model" "static" "-mframe-pointer=non-leaf" "-fno-rounding-math" "-mconstructor-aliases" \
> "-munwind-tables" "-target-cpu" "generic" "-target-feature" "+neon" "-target-abi" "aapcs" \
> "-fallow-half-arguments-and-returns" "-debug-info-kind=standalone" "-dwarf-version=4" \
> "-debugger-tuning=gdb" \
> "-fcoverage-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
> "-O2" "-Wno-format-zero-length" "-Wsystem-headers" "-Werror" "-Wall" "-Wno-format-y2k" "-W" \
> "-Wno-unused-parameter" "-Wpointer-arith" "-Wreturn-type" "-Wcast-qual" "-Wwrite-strings" "-Wswitch" \
> "-Wshadow" "-Wunused-parameter" "-Wcast-align" "-Wchar-subscripts" "-Wredundant-decls" \
> "-Wmissing-variable-declarations" "-Wno-empty-body" "-Wno-string-plus-int" "-Wno-unused-const-variable" \
> "-Wno-error=unused-but-set-variable" "-Wno-deprecated-declarations" "-Wno-deprecated-copy" \
> "-Wno-c++11-extensions" "-std=c++11" "-fdeprecated-macro" \
> "-fdebug-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
> "-ferror-limit" "19" "-stack-protector" "2" "-fno-signed-char" "-fgnuc-version=4.2.1" \
> "-fcxx-exceptions" "-fexceptions" "-vectorize-loops" "-vectorize-slp" "-faddrsig" \
> "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-x" "c++" "gmock_main-f5c28a.cpp"
> 
> and then "run" at the (lldb) prompt. It might stop and let you
> get a backtrace (bt command) in addition to whatever it reports
> about the stoppage.

That seems to have worked, to some extent. Here's the transcript, in single-user mode:

root@pelorus:/usr/src # 
root@pelorus:/usr/src # lldb -- "/usr/bin/c++" "-cc1" "-triple" "aarch64-unknown-freebsd13.0" "-emit-obj" "--mrelax-relocations" \
> "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "gmock_main.cc" \
> "-mrelocation-model" "static" "-mframe-pointer=non-leaf" "-fno-rounding-math" "-mconstructor-aliases" \
> "-munwind-tables" "-target-cpu" "generic" "-target-feature" "+neon" "-target-abi" "aapcs" \
> "-fallow-half-arguments-and-returns" "-debug-info-kind=standalone" "-dwarf-version=4" \
> "-debugger-tuning=gdb" \
compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
"-O2" "-Wno-format-zero-length" "-Wsystem-headers" "-Werror" "-Wall" "-Wno-format-y2k" "-W" \
"-Wno-unused-parameter" "-Wpointer-arith" "-Wreturn-type" "-Wcast-qual" "-Wwrite-strings" "-Wswitch" \
"-Wshadow" "-Wunused-parameter" "-Wcast-align" "-Wchar-subscripts" "-Wredundant-decls" \
"-Wmissing-variable-declarations" "-Wno-empty-body" "-Wno-string-plus-int" "-Wno-unused-const-variable" \
"-Wno-error=unused-but-set-variable" "-Wno-deprecated-declarations" "-Wno-deprecated-copy" \
"-Wno-c++11-extensions" "-std=c++11" "-fdeprecated-macro" \
"-fdebug-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
"-ferror-limit" "19" "-stack-protector" "2" "-fno-signed-char" "-fgnuc-version=4.2.1" \
"-fcxx-exceptions" "-fexceptions" "-vectorize-loops" "-vectorize-slp" "-faddrsig" \
"-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-x" "c++" "gmock_main-f5c28a.cpp"
> "-fcoverage-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
> "-O2" "-Wno-format-zero-length" "-Wsystem-headers" "-Werror" "-Wall" "-Wno-format-y2k" "-W" \
> "-Wno-unused-parameter" "-Wpointer-arith" "-Wreturn-type" "-Wcast-qual" "-Wwrite-strings" "-Wswitch" \
> "-Wshadow" "-Wunused-parameter" "-Wcast-align" "-Wchar-subscripts" "-Wredundant-decls" \
> "-Wmissing-variable-declarations" "-Wno-empty-body" "-Wno-string-plus-int" "-Wno-unused-const-variable" \
> "-Wno-error=unused-but-set-variable" "-Wno-deprecated-declarations" "-Wno-deprecated-copy" \
> "-Wno-c++11-extensions" "-std=c++11" "-fdeprecated-macro" \
> "-fdebug-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" \
> "-ferror-limit" "19" "-stack-protector" "2" "-fno-signed-char" "-fgnuc-version=4.2.1" \
> "-fcxx-exceptions" "-fexceptions" "-vectorize-loops" "-vectorize-slp" "-faddrsig" \
> "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-x" "c++" "gmock_main-f5c28a.cpp"
(lldb) target create "/usr/bin/c++"

Current executable set to '/usr/bin/c++' (aarch64).
(lldb) settings set -- target.run-args  "-cc1" "-triple" "aarch64-unknown-freebsd13.0" "-emit-obj" "--mrelax-relocations" "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "gmock_main.cc" "-mrelocation-model" "static" "-mframe-pointer=non-leaf" "-fno-rounding-math" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "generic" "-target-feature" "+neon" "-target-abi" "aapcs" "-fallow-half-arguments-and-returns" "-debug-info-kind=standalone" "-dwarf-version=4" "-debugger-tuning=gdb" "-fcoverage-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" "-O2" "-Wno-format-zero-length" "-Wsystem-headers" "-Werror" "-Wall" "-Wno-format-y2k" "-W" "-Wno-unused-parameter" "-Wpointer-arith" "-Wreturn-type" "-Wcast-qual" "-Wwrite-strings" "-Wswitch" "-Wshadow" "-Wunused-parameter" "-Wcast-align" "-Wchar-subscripts" "-Wredundant-decls" "-Wmissing-variable-declarations" "-Wno-empty-body" "-Wno-string-plus-int" "-Wno-unused-const-variable" "-Wno-error=unused-but-set-variable" "-Wno-deprecated-declarations" "-Wno-deprecated-copy" "-Wno-c++11-extensions" "-std=c++11" "-fdeprecated-macro" "-fdebug-compilation-dir=/usr/obj/usr/src/arm64.aarch64/lib/googletest/gmock_main" "-ferror-limit" "19" "-stack-protector" "2" "-fno-signed-char" "-fgnuc-version=4.2.1" "-fcxx-exceptions" "-fexceptions" "-vectorize-loops" "-vectorize-slp" "-faddrsig" "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-x" "c++" "gmock_main-f5c28a.cpp"
(lldb) 
(lldb) run
Process 58516 launched: '/usr/bin/c++' (aarch64)
Process 58516 stopped
* thread #1, name = 'c++', stop reason = signal SIGSEGV: invalid address (fault address: 0x1)
    frame #0: 0x0000000002df7444 c++`::ProcessDeclAttributeList() [inlined] getPointer at PointerIntPair.h:59:58
   56  	
   57  	  explicit PointerIntPair(PointerTy PtrVal) { initWithPointer(PtrVal); }
   58  	
-> 59  	  PointerTy getPointer() const { return Info::getPointer(Value); }
   60  	
   61  	  IntType getInt() const { return (IntType)Info::getInt(Value); }
   62  	
(lldb) bt
* thread #1, name = 'c++', stop reason = signal SIGSEGV: invalid address (fault address: 0x1)
  * frame #0: 0x0000000002df7444 c++`::ProcessDeclAttributeList() [inlined] getPointer at PointerIntPair.h:59:58
    frame #1: 0x0000000002df7444 c++`::ProcessDeclAttributeList() [inlined] isNull at PointerUnion.h:172:43
    frame #2: 0x0000000002df7444 c++`::ProcessDeclAttributeList() [inlined] empty at TinyPtrVector.h:166:13
    frame #3: 0x0000000002df7444 c++`::ProcessDeclAttributeList() [inlined] empty at ParsedAttr.h:873:40
    frame #4: 0x0000000002df7444 c++`::ProcessDeclAttributeList() at SemaDeclAttr.cpp:8449:16
    frame #5: 0x000000000317e784 c++`::ActOnClassTemplateSpecialization() at SemaTemplate.cpp:8537:3
(lldb) 
[repeated bt commands seem to duplicate the same output]

I can't make much sense of it, but perhaps others can. It does look
as if I've somehow corrupted c++. Is there some way to bootstrap
past the defect? All the clean targets I've tried (clean, cleandir, 
cleanworld, rm -rf /usr/obj, cleandepend) seem to have no effect,
singly and in combination. 

Is it possible to simply delete /usr/src/contrib/llvm-project and 
let git reconstruct it, then force a compiler rebuild somwhow?

Thanks very much for reading and all your help!

bob prohaska