[llvm-bugs] [Bug 51159] New: _ExtInt in block parameter list causes Clang to crash

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Jul 21 22:15:25 PDT 2021 

https://bugs.llvm.org/show_bug.cgi?id=51159

            Bug ID: 51159
           Summary: _ExtInt in block parameter list causes Clang to crash
           Product: clang
           Version: 12.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C
          Assignee: unassignedclangbugs at nondot.org
          Reporter: alex at alexrp.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Code:

    #include <stdlib.h>
    void * _NSConcreteGlobalBlock[32];
    void foo(void)
    {
        __auto_type blk = ^void *(unsigned _ExtInt(64) len)
        {
            return malloc(len);
        };
    }

Compile with `clang test.c -fblocks -shared` or something to that effect.

Result:

    clang version 12.0.1
    Target: x86_64-pc-windows-msvc
    Thread model: posix
    InstalledDir: C:\Program Files\LLVM\bin
    "C:\\Program Files\\LLVM\\bin\\clang.exe" -cc1 -triple
x86_64-pc-windows-msvc19.29.30040 -emit-obj -mrelax-all
-mincremental-linker-compatible --mrelax-relocations -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name foo.c
-mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno
-fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64
-tune-cpu generic -v -resource-dir "C:\\Program
Files\\LLVM\\lib\\clang\\12.0.1" -internal-isystem "C:\\Program
Files\\LLVM\\lib\\clang\\12.0.1\\include" -internal-isystem "C:\\Program Files
(x86)\\Microsoft Visual
Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30037\\include"
-internal-isystem "C:\\Program Files (x86)\\Microsoft Visual
Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30037\\atlmfc\\include"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\Include\\10.0.19041.0\\ucrt" -internal-isystem "C:\\Program Files
(x86)\\Windows Kits\\10\\include\\10.0.19041.0\\shared" -internal-isystem
"C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.19041.0\\um"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\include\\10.0.19041.0\\winrt" -fdebug-compilation-dir
"C:\\Users\\alex\\source\\repos\\tests\\c" -ferror-limit 19
-fmessage-length=150 -fblocks -fno-use-cxa-atexit -fms-extensions
-fms-compatibility -fms-compatibility-version=19.29.30040
-fdelayed-template-parsing -fcolor-diagnostics -faddrsig -o
"C:\\Users\\alex\\AppData\\Local\\Temp\\foo-7c8ff7.o" -x c foo.c
    clang -cc1 version 12.0.1 based upon LLVM 12.0.1 default target
x86_64-pc-windows-msvc
    #include "..." search starts here:
    #include <...> search starts here:
    C:\Program Files\LLVM\lib\clang\12.0.1\include
    C:\Program Files (x86)\Microsoft Visual
Studio\2019\Community\VC\Tools\MSVC\14.29.30037\include
    C:\Program Files (x86)\Microsoft Visual
Studio\2019\Community\VC\Tools\MSVC\14.29.30037\atlmfc\include
    C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt
    C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared
    C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um
    C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt
    End of search list.
    PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
    Stack dump:
    0.      Program arguments: "C:\\Program Files\\LLVM\\bin\\clang.exe" -cc1
-triple x86_64-pc-windows-msvc19.29.30040 -emit-obj -mrelax-all
-mincremental-linker-compatible --mrelax-relocations -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name foo.c
-mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno
-fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64
-tune-cpu generic -v -resource-dir "C:\\Program
Files\\LLVM\\lib\\clang\\12.0.1" -internal-isystem "C:\\Program
Files\\LLVM\\lib\\clang\\12.0.1\\include" -internal-isystem "C:\\Program Files
(x86)\\Microsoft Visual
Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30037\\include"
-internal-isystem "C:\\Program Files (x86)\\Microsoft Visual
Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30037\\atlmfc\\include"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\Include\\10.0.19041.0\\ucrt" -internal-isystem "C:\\Program Files
(x86)\\Windows Kits\\10\\include\\10.0.19041.0\\shared" -internal-isystem
"C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.19041.0\\um"
-internal-isystem "C:\\Program Files (x86)\\Windows
Kits\\10\\include\\10.0.19041.0\\winrt" -fdebug-compilation-dir
C:\\Users\\alex\\source\\repos\\tests\\c -ferror-limit 19 -fmessage-length=150
-fblocks -fno-use-cxa-atexit -fms-extensions -fms-compatibility
-fms-compatibility-version=19.29.30040 -fdelayed-template-parsing
-fcolor-diagnostics -faddrsig -o
C:\\Users\\alex\\AppData\\Local\\Temp\\foo-7c8ff7.o -x c foo.c
    1.      <eof> parser at end of file
    2.      foo.c:3:6: LLVM IR generation of declaration 'foo'
    3.      foo.c:3:6: Generating code for declaration 'foo'
    #0 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x37c528a
C:\Program Files\LLVM\bin\clang.exe 0x37c2e2b
    #1 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1fecbc9
C:\Program Files\LLVM\bin\clang.exe 0x1feb5b8
    #2 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1fe93e6
C:\Program Files\LLVM\bin\clang.exe 0x1fe799c
    #3 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x20269e1
C:\Program Files\LLVM\bin\clang.exe 0x1f1c465
    #4 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1f21641
C:\Program Files\LLVM\bin\clang.exe 0x1f1edeb
    #5 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1f1a7b1
C:\Program Files\LLVM\bin\clang.exe 0x1f1a334
    #6 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1fd2acc
C:\Program Files\LLVM\bin\clang.exe 0x1fc982c
    #7 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1fc8c10
C:\Program Files\LLVM\bin\clang.exe 0x1fd3400
    #8 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1e8bb27
C:\Program Files\LLVM\bin\clang.exe 0x1e8c3b6
    #9 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1d156cf
C:\Program Files\LLVM\bin\clang.exe 0x1d0e54c
    #10 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x1d12689
C:\Program Files\LLVM\bin\clang.exe 0x1d19022
    #11 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x3d7278f
C:\Program Files\LLVM\bin\clang.exe 0x3d70489
    #12 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x2f236c9
C:\Program Files\LLVM\bin\clang.exe 0x228b562
    #13 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x225250c
C:\Program Files\LLVM\bin\clang.exe 0x22f2a2e
    #14 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x7164
C:\Program Files\LLVM\bin\clang.exe 0x4344
    #15 0x00007ff6b9d9528a C:\Program Files\LLVM\bin\clang.exe 0x4066
C:\Program Files\LLVM\bin\clang.exe 0x3d8e9b8
    #16 0x00007ff6b9d9528a (C:\Program Files\LLVM\bin\clang.exe+0x37c528a)
    #17 0x00007ff6b9d92e2b (C:\Program Files\LLVM\bin\clang.exe+0x37c2e2b)
    0x00007FF6B9D9528A (0x0000025C76D71108 0x0000000000000020
0x0000025C76538DA0 0x0000025C765EEB70)
    0x00007FF6B9D92E2B (0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000)
    0x00007FF6B85BCBC9 (0x0000025C76E40128 0x0000000000000000
0x0000025C76E40128 0x0000B7E40B3B486E)
    0x00007FF6B85BB5B8 (0x00007FF6BC017940 0x000000AB48588558
0x000000AB48588580 0x000000AB48587F60)
    0x00007FF6B85B93E6 (0x0000025C765EEA10 0x00007FFB135D00A6
0x0000000000000000 0x0000000000000400)
    0x00007FF6B85B799C (0xFFFFFFFFFFFFF000 0x0000025C76E400F0
0x0000025C765EEA50 0x0000B7E40B3BA6DE)
    0x00007FF6B85F69E1 (0x0000000000000008 0x0000025C00000008
0x0000B7E40B3BA6AE 0x0000000000000040)
    0x00007FF6B84EC465 (0x0000000000000000 0x0000000000000000
0x0000025C76E400F0 0x0000000000000080)
    0x00007FF6B84F1641 (0x0000025C76D6D290 0x0000000000000000
0x000000AB00000001 0x0000025C76D6D290)
    0x00007FF6B84EEDEB (0x000000AB4858A0A0 0x0000000000000005
0x000000AB48580105 0x00007F00B9D43D00)
    0x00007FF6B84EA7B1 (0x000000AB4858A200 0x000000AB4858A300
0x0000025C76DD37A4 0x0000B7E40B3B906E)
    0x00007FF6B84EA334 (0x0000025C76DD37A4 0x0000B7E40B3B93DE
0x000000AB4858A300 0x0000000000000096)
    0x00007FF6B85A2ACC (0x0000025C765F1650 0x00007FF6B9D4595E
0x0000B7E40B3B93BE 0x0000025C7659BA80)
    0x00007FF6B859982C (0x00000000765FD400 0x00007FF6B9D4B5D7
0x0000025C76D39978 0x0000B7E40B3B92EE)
    0x00007FF6B8598C10 (0x0000025C76DD37A0 0x0000000000000000
0x0000025C76D39978 0x0000B7E40B3B95FE)
    0x00007FF6B85A3400 (0x0000025C76DD37A0 0x0000B7E40B3B94CE
0x0000025C765F30E8 0x000000000000003E)
    0x00007FF6B845BB27 (0x0000B7E40B3B944E 0x000000AB4858A7D0
0x0000B7E40B3B947E 0x0000025C765F1650)
    0x00007FF6B845C3B6 (0x0000025C76DD3840 0x0000025C76DD3870
0x0000025C765A1440 0x00007FF6B80B34DD)
    0x00007FF6B82E56CF (0x0000000000000000 0xFFFFFFFFFFFFFFFF
0x0000000000000000 0xFFFFFFFFFFFFFFFF)
    0x00007FF6B82DE54C (0x0000000000000000 0x0000025C765EEA10
0x0000B7E40B3B8C7E 0x0000000000000001)
    0x00007FF6B82E2689 (0x0000000000001837 0x0000025C765EDF18
0x000000000000005A 0x00007FF6B829BD2C)
    0x00007FF6B82E9022 (0x0000000000000000 0x000000AB4858D7F0
0x0000025C765FE570 0x000000AB4858D900)
    0x00007FF6BA34278F (0x0000025C76DD37A0 0x0000000000000000
0x0000025C765FD820 0x0000000000000000)
    0x00007FF6BA340489 (0x000000AB4858D8F8 0x000000AB4858D918
0x0000025C7650E490 0x00007FF6B881FFDA)
    0x00007FF6B94F36C9 (0x0000025C7656E3D0 0x0000B7E40B3BE5CE
0x0000000000000000 0x000000000000000F)
    0x00007FF6B885B562 (0x0000000000000001 0x00007FF600000000
0x00000000000000E8 0x000000AB4858E340)
    0x00007FF6B882250C (0x0000025C76539890 0x000000AB4858D72C
0x0000000000000104 0x000000000000000F)
    0x00007FF6B88C2A2E (0x00000000000003CB 0x0000025C7656D320
0x00000000000003CB 0x00007FFB15D831A2)
    0x00007FF6B65D7164 (0x00007FF6BA361D5C 0x0000000000000000
0x0000000000000000 0x00007FFB135CF24E)
    0x00007FF6B65D4344 (0x0000000000000016 0x0000000020010021
0x000000AB4858E898 0x00007FFB44000145)
    0x00007FF6B65D4066 (0x0000000000000000 0x00007FF6BA35EA31
0x0000000000000000 0x0000000000000000)
    0x00007FF6BA35E9B8 (0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000)
    0x00007FFB14C554E0 (0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000), BaseThreadInitThunk() + 0x10 bytes(s)
    0x00007FFB15D6485B (0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000), RtlUserThreadStart() + 0x2B bytes(s)
    clang: error: clang frontend command failed due to signal (use -v to see
invocation)
    clang version 12.0.1
    Target: x86_64-pc-windows-msvc
    Thread model: posix
    InstalledDir: C:\Program Files\LLVM\bin
    clang: note: diagnostic msg:
    ********************

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