[llvm-bugs] [Bug 41451] clang-cl and libc++ produce PDBs that confuse windbg / cdb, prints "<unknown base type NNN>"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41451

Nico Weber <nicolasweber at gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #2 from Nico Weber <nicolasweber at gmx.de> ---
To get libc++.dll, I ran

>ninja -C out\gn libcxx

in a chrome checkout, with empty args.gn. Then copied:

C:\src\chrome\src>cdb -c "bp `test.cc:6`; g; dv; q" test.exe

C:\src\chrome\src>copy "out\gn\libc++.dll" .
        1 file(s) copied.

C:\src\chrome\src>copy "out\gn\libc++.dll.lib" .
        1 file(s) copied.

C:\src\chrome\src>copy "out\gn\libc++.dll.pdb" .
        1 file(s) copied.

New libc++ needs an additional define:

C:\src\chrome\src>"third_party\llvm-build\Release+Asserts\bin\clang-cl.exe"
test.cc /I "buildtools\third_party\libc++\trunk\include" -D_LIBCPP_NO_AUTO_LINK
-D_LIBCPP_ABI_UNSTABLE libc++.dll.lib /Zi
/D_LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS




C:\src\chrome\src>cdb -c "bp `test.cc:6`; g; dv; q" test.exe

Microsoft (R) Windows Debugger Version 10.0.17763.1 AMD64
Copyright (c) Microsoft Corporation. All rights reserved.

CommandLine: test.exe
Symbol search path is: srv*
Executable search path is:
ModLoad: 00007ff6`07410000 00007ff6`074a0000   test.exe
ModLoad: 00007ff9`399e0000 00007ff9`39bd0000   ntdll.dll
ModLoad: 00007ff9`38970000 00007ff9`38a22000   C:\WINDOWS\System32\KERNEL32.DLL
ModLoad: 00007ff9`36d90000 00007ff9`37035000  
C:\WINDOWS\System32\KERNELBASE.dll
ModLoad: 00007ff9`12070000 00007ff9`12181000   C:\src\chrome\src\libc++.dll
ModLoad: 00007ff9`2cb60000 00007ff9`2cb8a000  
C:\WINDOWS\SYSTEM32\VCRUNTIME140D.dll
ModLoad: 00007ff9`02330000 00007ff9`024f3000  
C:\WINDOWS\SYSTEM32\ucrtbased.dll
ModLoad: 00007ff9`18d50000 00007ff9`18e37000  
C:\WINDOWS\SYSTEM32\MSVCP140D.dll
ModLoad: 00007ff9`2e200000 00007ff9`2e20f000  
C:\WINDOWS\SYSTEM32\VCRUNTIME140_1D.dll
(2b50.5d5c): Break instruction exception - code 80000003 (first chance)
ntdll!LdrpDoDebuggerBreak+0x30:
00007ff9`39ab0fac cc              int     3
0:000> cdb: Reading initial command 'bp `test.cc:6`; g; dv; q'
WARNING: Line information loading disabled
*** WARNING: Unable to verify checksum for test.exe
Breakpoint 0 hit
              s = class
std::__1::basic_string<char,std::char_traits<char>,std::allocator<char> >
             s2 = class
std::__1::basic_string<char,std::char_traits<char>,std::allocator<char> >
quit:
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\atlmfc.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\concurrency.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\cpp_rest.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\stl.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\Windows.Data.Json.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\Windows.Devices.Geolocation.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\Windows.Devices.Sensors.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\Windows.Media.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\windows.natvis'
NatVis script unloaded from 'C:\Program Files (x86)\Windows
Kits\10\Debuggers\x64\Visualizers\winrt.natvis'



Looks like this is no longer a problem \o/

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