#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): i'm not sure if the issue is apple llvm/as being conservative in verifying the embedded dwarf or not, nor if more recent clang doesn't have that issue -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * cc: niteria (removed) Old description:

for current master, if i build on a mac / OSX high sierra environment with CC set as any flavor of recent GCC rather than apple clang, i get a failure `no open frame` when as (aka apple clang / apple llvm acting as the assembler) is run on the `.s` file produced by `stgRun.c` (`rts/StgCRun.c` to be exact)

this error message seems to come from https://github.com/llvm- mirror/llvm/blob/da4a2839d80ac52958be0129b871beedfe90136e/lib/MC/MCStreamer.cpp#L221

https://gist.github.com/cartazio/8cbfb3305e1daa4f7ffc3f6bb90a2891 has the gcc and clang style assembly for {{{ /usr/local/bin/gcc-8 -fno-stack-protector -DTABLES_NEXT_TO_CODE -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen -fno-common -U__PIC__ -D__PIC__ -x assembler -c /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc22029_0/ghc_1.s -o rts/dist/build/StgCRun.debug_o }}} this is example asm for the the debug way

New description: for current master, if i build on a mac / OSX high sierra environment with CC set as any flavor of recent GCC rather than apple clang, i get a failure "no open frame" when as (aka apple clang / apple llvm acting as the assembler) is run on the .s file produced by stgRun.c (rts/StgCRun.c to be exact) this error message seems to come from https://github.com/llvm- mirror/llvm/blob/da4a2839d80ac52958be0129b871beedfe90136e/lib/MC/MCStreamer.cpp#L221 https://gist.github.com/cartazio/8cbfb3305e1daa4f7ffc3f6bb90a2891 has the gcc and clang style assembly for /usr/local/bin/gcc-8 -fno-stack-protector -DTABLES_NEXT_TO_CODE -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist- ghcconstants/header -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen -fno-common -U__PIC__ -D__PIC__ -x assembler -c /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc22029_0/ghc_1.s -o rts/dist/build/StgCRun.debug_o this is example asm for the the debug way -- Comment: or if asm with dwarf as emitted by GCC doesn't play nice with (apple?)clang's assembler (which is the system assembler on OSX high sierra) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): filed radar 40690578 on the apple side in case this unique to apple's flavor of clang / llvm / as -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): here you go {{{ .section __TEXT,__text,regular,pure_instructions .macosx_version_min 10, 13 .globl _hello ## -- Begin function hello .p2align 4, 0x90 _hello: ## @hello Lfunc_begin0: .file 1 "test.c" .loc 1 3 0 ## test.c:3:0 .cfi_startproc ## BB#0: pushq %rbp Lcfi0: .cfi_def_cfa_offset 16 Lcfi1: .cfi_offset %rbp, -16 movq %rsp, %rbp Lcfi2: .cfi_def_cfa_register %rbp subq $32, %rsp leaq L_.str(%rip), %rax movl $42, %esi movl $12, %edx movl %edi, -4(%rbp) movsd %xmm0, -16(%rbp) Ltmp0: .loc 1 4 5 prologue_end ## test.c:4:5 movq %rax, %rdi movb $0, %al callq _printf .loc 1 5 12 ## test.c:5:12 cvtsi2sdl -4(%rbp), %xmm0 .loc 1 5 13 is_stmt 0 ## test.c:5:13 mulsd -16(%rbp), %xmm0 .loc 1 5 12 ## test.c:5:12 cvttsd2si %xmm0, %edx .loc 1 5 5 ## test.c:5:5 movl %eax, -20(%rbp) ## 4-byte Spill movl %edx, %eax addq $32, %rsp popq %rbp retq Ltmp1: Lfunc_end0: .cfi_endproc ## -- End function .section __TEXT,__cstring,cstring_literals L_.str: ## @.str .asciz "hello %d %d" .section __DWARF,__debug_str,regular,debug Linfo_string: .asciz "Apple LLVM version 9.1.0 (clang-902.0.39.1)" ## string offset=0 .asciz "test.c" ## string offset=44 .asciz "/Users/carter/WorkSpace/projects/active/ghc-head-may2018 -clang-sad" ## string offset=51 .asciz "hello" ## string offset=118 .asciz "int" ## string offset=124 .asciz "a" ## string offset=128 .asciz "b" ## string offset=130 .asciz "double" ## string offset=132 .section __DWARF,__debug_abbrev,regular,debug Lsection_abbrev: .byte 1 ## Abbreviation Code .byte 17 ## DW_TAG_compile_unit .byte 1 ## DW_CHILDREN_yes .byte 37 ## DW_AT_producer .byte 14 ## DW_FORM_strp .byte 19 ## DW_AT_language .byte 5 ## DW_FORM_data2 .byte 3 ## DW_AT_name .byte 14 ## DW_FORM_strp .byte 16 ## DW_AT_stmt_list .byte 23 ## DW_FORM_sec_offset .byte 27 ## DW_AT_comp_dir .byte 14 ## DW_FORM_strp .byte 17 ## DW_AT_low_pc .byte 1 ## DW_FORM_addr .byte 18 ## DW_AT_high_pc .byte 6 ## DW_FORM_data4 .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 2 ## Abbreviation Code .byte 46 ## DW_TAG_subprogram .byte 1 ## DW_CHILDREN_yes .byte 17 ## DW_AT_low_pc .byte 1 ## DW_FORM_addr .byte 18 ## DW_AT_high_pc .byte 6 ## DW_FORM_data4 .byte 64 ## DW_AT_frame_base .byte 24 ## DW_FORM_exprloc .byte 3 ## DW_AT_name .byte 14 ## DW_FORM_strp .byte 58 ## DW_AT_decl_file .byte 11 ## DW_FORM_data1 .byte 59 ## DW_AT_decl_line .byte 11 ## DW_FORM_data1 .byte 39 ## DW_AT_prototyped .byte 25 ## DW_FORM_flag_present .byte 73 ## DW_AT_type .byte 19 ## DW_FORM_ref4 .byte 63 ## DW_AT_external .byte 25 ## DW_FORM_flag_present .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 3 ## Abbreviation Code .byte 5 ## DW_TAG_formal_parameter .byte 0 ## DW_CHILDREN_no .byte 2 ## DW_AT_location .byte 24 ## DW_FORM_exprloc .byte 3 ## DW_AT_name .byte 14 ## DW_FORM_strp .byte 58 ## DW_AT_decl_file .byte 11 ## DW_FORM_data1 .byte 59 ## DW_AT_decl_line .byte 11 ## DW_FORM_data1 .byte 73 ## DW_AT_type .byte 19 ## DW_FORM_ref4 .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 4 ## Abbreviation Code .byte 36 ## DW_TAG_base_type .byte 0 ## DW_CHILDREN_no .byte 3 ## DW_AT_name .byte 14 ## DW_FORM_strp .byte 62 ## DW_AT_encoding .byte 11 ## DW_FORM_data1 .byte 11 ## DW_AT_byte_size .byte 11 ## DW_FORM_data1 .byte 0 ## EOM(1) .byte 0 ## EOM(2) .byte 0 ## EOM(3) .section __DWARF,__debug_info,regular,debug Lsection_info: Lcu_begin0: .long 107 ## Length of Unit .short 4 ## DWARF version number Lset0 = Lsection_abbrev-Lsection_abbrev ## Offset Into Abbrev. Section .long Lset0 .byte 8 ## Address Size (in bytes) .byte 1 ## Abbrev [1] 0xb:0x64 DW_TAG_compile_unit .long 0 ## DW_AT_producer .short 12 ## DW_AT_language .long 44 ## DW_AT_name Lset1 = Lline_table_start0-Lsection_line ## DW_AT_stmt_list .long Lset1 .long 51 ## DW_AT_comp_dir .quad Lfunc_begin0 ## DW_AT_low_pc Lset2 = Lfunc_end0-Lfunc_begin0 ## DW_AT_high_pc .long Lset2 .byte 2 ## Abbrev [2] 0x2a:0x36 DW_TAG_subprogram .quad Lfunc_begin0 ## DW_AT_low_pc Lset3 = Lfunc_end0-Lfunc_begin0 ## DW_AT_high_pc .long Lset3 .byte 1 ## DW_AT_frame_base .byte 86 .long 118 ## DW_AT_name .byte 1 ## DW_AT_decl_file .byte 3 ## DW_AT_decl_line ## DW_AT_prototyped .long 96 ## DW_AT_type ## DW_AT_external .byte 3 ## Abbrev [3] 0x43:0xe DW_TAG_formal_parameter .byte 2 ## DW_AT_location .byte 145 .byte 124 .long 128 ## DW_AT_name .byte 1 ## DW_AT_decl_file .byte 3 ## DW_AT_decl_line .long 96 ## DW_AT_type .byte 3 ## Abbrev [3] 0x51:0xe DW_TAG_formal_parameter .byte 2 ## DW_AT_location .byte 145 .byte 112 .long 130 ## DW_AT_name .byte 1 ## DW_AT_decl_file .byte 3 ## DW_AT_decl_line .long 103 ## DW_AT_type .byte 0 ## End Of Children Mark .byte 4 ## Abbrev [4] 0x60:0x7 DW_TAG_base_type .long 124 ## DW_AT_name .byte 5 ## DW_AT_encoding .byte 4 ## DW_AT_byte_size .byte 4 ## Abbrev [4] 0x67:0x7 DW_TAG_base_type .long 132 ## DW_AT_name .byte 4 ## DW_AT_encoding .byte 8 ## DW_AT_byte_size .byte 0 ## End Of Children Mark .section __DWARF,__debug_ranges,regular,debug Ldebug_range: .section __DWARF,__debug_macinfo,regular,debug Ldebug_macinfo: Lcu_macro_begin0: .byte 0 ## End Of Macro List Mark .section __DWARF,__apple_names,regular,debug Lnames_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 1 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long 0 ## Bucket 0 .long 261238937 ## Hash in Bucket 0 .long LNames0-Lnames_begin ## Offset in Bucket 0 LNames0: .long 118 ## hello .long 1 ## Num DIEs .long 42 .long 0 .section __DWARF,__apple_objc,regular,debug Lobjc_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 0 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long -1 ## Bucket 0 .section __DWARF,__apple_namespac,regular,debug Lnamespac_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 1 ## Header Bucket Count .long 0 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 1 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .long -1 ## Bucket 0 .section __DWARF,__apple_types,regular,debug Ltypes_begin: .long 1212240712 ## Header Magic .short 1 ## Header Version .short 0 ## Header Hash Function .long 2 ## Header Bucket Count .long 2 ## Header Hash Count .long 20 ## Header Data Length .long 0 ## HeaderData Die Offset Base .long 3 ## HeaderData Atom Count .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 .short 3 ## DW_ATOM_die_tag .short 5 ## DW_FORM_data2 .short 4 ## DW_ATOM_type_flags .short 11 ## DW_FORM_data1 .long 0 ## Bucket 0 .long -1 ## Bucket 1 .long 193495088 ## Hash in Bucket 0 .long -113419488 ## Hash in Bucket 0 .long Ltypes0-Ltypes_begin ## Offset in Bucket 0 .long Ltypes1-Ltypes_begin ## Offset in Bucket 0 Ltypes0: .long 124 ## int .long 1 ## Num DIEs .long 96 .short 36 .byte 0 .long 0 Ltypes1: .long 132 ## double .long 1 ## Num DIEs .long 103 .short 36 .byte 0 .long 0 .subsections_via_symbols .section __DWARF,__debug_line,regular,debug Lsection_line: Lline_table_start0: }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): this still doesn't answer why the assembly clang generates for the same file is accepted, but the one generated by gcc isnt' -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): also apple clang (some v5 llvm variant) rejects the assembly emited by clang v6! {{{ /usr/bin/clang -fno-stack-protector -DTABLES_NEXT_TO_CODE -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist- ghcconstants/header -Irts -Irts/dist/build -Irts/dist/build -Irts/dist/build/./autogen -fno-common -U__PIC__ -D__PIC__ -x assembler -c /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc34265_0/ghc_1.s -o rts/dist/build/StgCRun.thr_o clang: warning: argument unused during compilation: '-fno-stack-protector' [-Wunused-command-line-argument] clang: warning: argument unused during compilation: '-D TABLES_NEXT_TO_CODE' [-Wunused-command-line-argument] clang: warning: argument unused during compilation: '-fno-common' [-Wunused-command-line-argument] clang: warning: argument unused during compilation: '-U __PIC__' [-Wunused-command-line-argument] clang: warning: argument unused during compilation: '-D __PIC__' [-Wunused-command-line-argument] clang -cc1as: fatal error: error in backend: No open frame }}} this definitely seems like a bug in llvm -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): D4780 Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * differential: => D4780 Comment: https://phabricator.haskell.org/D4780 for a candidate patch. Not perfect, and may have other issues, but fixes the mac build without impacting other platforms. I'm not 100% sure i'm fixing it perfectly, but it definitly has zero impact on non-darwin platforms, and my understanding is this particular dwarf data only works in the presence of the RTS support for stack walking which is exclusive to ELF platforms? Or is there a fundamental error in this fix? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): D4780 Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Unfortunately this appears to break on Linux. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"86210b238b86d810874a2315d1715546a4006cea/ghc" 86210b23/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="86210b238b86d810874a2315d1715546a4006cea" rts: Use .cfi_{start|end}proc directives Test Plan: Validate using LLVM assembler Reviewers: carter, erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, thomie GHC Trac Issues: #15207 Differential Revision: https://phabricator.haskell.org/D4781 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Sigh; this is all just very unfortunate. It seems that there is something funny about Apple's clang (surprise surprise!) The patch as-merged breaks under standard Clang, which apparently inserts the necessary CFI directives into inline assembler, just as GCC does. I'm going to revert until we have a better understanding of what is going on here. Carter, can you look into precisely when this happens? Specifically which Clang version are you seeing break? Which Clang versions work? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by awson): Don't know anything about Apple's clang, but exactly the same way behaves Windows msvc‑abi‑targeted clang – it inserts nothing. Generally, clang is able to mimic both gcc behaviour *and* native platform toolset behavior, and tries to be gcc compatible when targeting gnu triplet and native toolset compatible when targeting native triplet. Thus, I believe changing `#if defined(__clang__)` to `#if defined(__clang__) && !defined (__GNUC__)` should suffice. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): @Ben, i dropped the ball on that comparison, i'll add it to my queue :) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): i'll see about doing the nofib runs this weekend -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:26 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): my GCC build is using my D4780 patch for stgcrun.c notable difference: compile times are like 5% better on average with the GCC built ghc, there also seems to be an average 2 percent advantage in GC times ... though i could be reading this wrong -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:27 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): disregard this nofib report, i didn't do threaded executions -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:29 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * Attachment "cool-nofib-threaded-n4-report.txt" added. threaded with time to cool nofib, N4 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * Attachment "no-ht-dirty-cool-nofib-threaded-n4-report.txt" added. hyper threading disabled quad core threaded rts nofib -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): this was on top of the current 8.6 branch as of today -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:32 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): my build gets stuck at the following {{{ "inplace/bin/ghc-stage1" -this-unit-id rts -shared -dynamic -dynload deploy -no-auto-link-packages -Lrts/dist/build -lffi -optl-Wl,-rpath -optl-Wl,@loader_path `cat rts/dist/libs.depend` rts/dist/build/STM.dyn_o rts/dist/build/Timer.dyn_o rts/dist/build/ThreadPaused.dyn_o rts/dist/build/Ticky.dyn_o rts/dist/build/ThreadLabels.dyn_o rts/dist/build/RtsMain.dyn_o rts/dist/build/ProfilerReport.dyn_o rts/dist/build/PathUtils.dyn_o rts/dist/build/LibdwPool.dyn_o rts/dist/build/Proftimer.dyn_o rts/dist/build/CheckUnload.dyn_o rts/dist/build/fs.dyn_o rts/dist/build/OldARMAtomic.dyn_o rts/dist/build/HsFFI.dyn_o rts/dist/build/RtsDllMain.dyn_o rts/dist/build/RtsSymbolInfo.dyn_o rts/dist/build/RaiseAsync.dyn_o rts/dist/build/ProfHeap.dyn_o rts/dist/build/Schedule.dyn_o rts/dist/build/Hash.dyn_o rts/dist/build/Trace.dyn_o rts/dist/build/Threads.dyn_o rts/dist/build/Hpc.dyn_o rts/dist/build/Weak.dyn_o rts/dist/build/ProfilerReportJson.dyn_o rts/dist/build/Task.dyn_o rts/dist/build/StgCRun.dyn_o rts/dist/build/ClosureFlags.dyn_o rts/dist/build/RetainerProfile.dyn_o rts/dist/build/Libdw.dyn_o rts/dist/build/Stats.dyn_o rts/dist/build/Interpreter.dyn_o rts/dist/build/Messages.dyn_o rts/dist/build/RtsUtils.dyn_o rts/dist/build/RtsSymbols.dyn_o rts/dist/build/xxhash.dyn_o rts/dist/build/LdvProfile.dyn_o rts/dist/build/Capability.dyn_o rts/dist/build/Printer.dyn_o rts/dist/build/Globals.dyn_o rts/dist/build/Adjustor.dyn_o rts/dist/build/RtsAPI.dyn_o rts/dist/build/Inlines.dyn_o rts/dist/build/TopHandler.dyn_o rts/dist/build/Linker.dyn_o rts/dist/build/Disassembler.dyn_o rts/dist/build/WSDeque.dyn_o rts/dist/build/StaticPtrTable.dyn_o rts/dist/build/Pool.dyn_o rts/dist/build/StgPrimFloat.dyn_o rts/dist/build/FileLock.dyn_o rts/dist/build/RtsStartup.dyn_o rts/dist/build/RetainerSet.dyn_o rts/dist/build/Profiling.dyn_o rts/dist/build/Sparks.dyn_o rts/dist/build/RtsFlags.dyn_o rts/dist/build/RtsMessages.dyn_o rts/dist/build/Stable.dyn_o rts/dist/build/Arena.dyn_o rts/dist/build/Heap.dyn_o rts/dist/build/hooks/StackOverflow.dyn_o rts/dist/build/hooks/LongGCSync.dyn_o rts/dist/build/hooks/OnExit.dyn_o rts/dist/build/hooks/FlagDefaults.dyn_o rts/dist/build/hooks/MallocFail.dyn_o rts/dist/build/hooks/OutOfHeap.dyn_o rts/dist/build/sm/Scav_thr.dyn_o rts/dist/build/sm/Storage.dyn_o rts/dist/build/sm/Evac.dyn_o rts/dist/build/sm/Sanity.dyn_o rts/dist/build/sm/GC.dyn_o rts/dist/build/sm/MarkWeak.dyn_o rts/dist/build/sm/Evac_thr.dyn_o rts/dist/build/sm/BlockAlloc.dyn_o rts/dist/build/sm/GCUtils.dyn_o rts/dist/build/sm/GCAux.dyn_o rts/dist/build/sm/Sweep.dyn_o rts/dist/build/sm/CNF.dyn_o rts/dist/build/sm/Compact.dyn_o rts/dist/build/sm/Scav.dyn_o rts/dist/build/sm/MBlock.dyn_o rts/dist/build/eventlog/EventLog.dyn_o rts/dist/build/eventlog/EventLogWriter.dyn_o rts/dist/build/linker/elf_util.dyn_o rts/dist/build/linker/elf_reloc.dyn_o rts/dist/build/linker/LoadArchive.dyn_o rts/dist/build/linker/elf_plt_arm.dyn_o rts/dist/build/linker/SymbolExtras.dyn_o rts/dist/build/linker/CacheFlush.dyn_o rts/dist/build/linker/Elf.dyn_o rts/dist/build/linker/elf_got.dyn_o rts/dist/build/linker/M32Alloc.dyn_o rts/dist/build/linker/elf_plt_aarch64.dyn_o rts/dist/build/linker/elf_plt.dyn_o rts/dist/build/linker/PEi386.dyn_o rts/dist/build/linker/MachO.dyn_o rts/dist/build/linker/elf_reloc_aarch64.dyn_o rts/dist/build/posix/GetEnv.dyn_o rts/dist/build/posix/Select.dyn_o rts/dist/build/posix/Signals.dyn_o rts/dist/build/posix/TTY.dyn_o rts/dist/build/posix/Itimer.dyn_o rts/dist/build/posix/OSThreads.dyn_o rts/dist/build/posix/GetTime.dyn_o rts/dist/build/posix/OSMem.dyn_o rts/dist/build/Updates.dyn_o rts/dist/build/HeapStackCheck.dyn_o rts/dist/build/StgStdThunks.dyn_o rts/dist/build/Exception.dyn_o rts/dist/build/Apply.dyn_o rts/dist/build/StgMiscClosures.dyn_o rts/dist/build/Compact.dyn_o rts/dist/build/PrimOps.dyn_o rts/dist/build/StgStartup.dyn_o rts/dist/build/AutoApply.dyn_o -fPIC -dynamic -H32m -O -Wall -Iincludes -Iincludes/dist -Iincludes/dist- derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -DFS_NAMESPACE=rts -this-unit-id rts -dcmm-lint -DDTRACE -i -irts -irts/dist/build -Irts/dist/build -irts/dist/build/./autogen -Irts/dist/build/./autogen -O2 -Wcpp-undef -Wnoncanonical-monad-instances -fno-use-rpaths -o rts/dist/build/libHSrts-ghc8.6.2.dylib 0 0x10c2f3898 __assert_rtn + 129 1 0x10c30c983 mach_o::relocatable::Parser::parse(mach_o::relocatable::ParserOptions const&) + 3153 2 0x10c30274c mach_o::relocatable::Parser::parse(unsigned char const*, unsigned long long, char const*, long, ld::File::Ordinal, mach_o::relocatable::ParserOptions const&) + 282 3 0x10c35a12c ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool) + 1014 4 0x10c35d4f7 ld::tool::InputFiles::parseWorkerThread() + 533 5 0x7fff59b6d661 _pthread_body + 340 6 0x7fff59b6d50d _pthread_body + 0 A linker snapshot was created at: /tmp/libHSrts-ghc8.6.2.dylib-2018-10-12-212259.ld-snapshot ld: Assertion failed: (cfiStartsArray[i] != cfiStartsArray[i-1]), function parse, file /Library/Caches/com.apple.xbs/Sources/ld64_Fall2018/ld64-409.12/src/ld/parsers/macho_relocatable_file.cpp, line 1939. collect2: error: ld returned 1 exit status `gcc-8' failed in phase `Linker'. (Exit code: 1) rts/ghc.mk:315: recipe for target 'rts/dist/build/libHSrts-ghc8.6.2.dylib' failed make[1]: *** [rts/dist/build/libHSrts-ghc8.6.2.dylib] Error 1 Makefile:122: recipe for target 'all' failed make: *** [all] Error 2 }}} i tried out using LLVM 7's ld.lld tool, and i had the same problme/error there.. iVe 1-2 ideas left i'm going to try -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:34 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * Attachment "fustratedSTGCRun.s" added. gcc's asssembly for the offending file -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Changes (by carter): * Attachment "clangSTGCRUN.s" added. happy stgCRun darwin asm -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by carter): (though it may be because i didn't reboot the build after editing the cabal.in file for the RTS) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:38 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Unfortunately this severely limits the usability of DWARF on the whole. In general one can only reliably unwind the stack if unwinding tables are available for all code in the running image. If you find a single frame for which there is no unwind information (or a frame pointer) available you must stop. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:40 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"1ebe8438cd29448291229d5ce23c9f73216e9650/ghc" 1ebe8438/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="1ebe8438cd29448291229d5ce23c9f73216e9650" StgCRun: Disable unwinding on Darwin See #15207. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:42 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#15207: bad dwarf frame in stgRun.c when compiled with with gcc on mac and assembled by as/gcc/clang (aka apple clang assembler) -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.4.3 Resolution: fixed | Keywords: DWARF Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4781 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * keywords: => DWARF -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15207#comment:44 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler