[llvm-dev] custom LLVM Pass with options fails to load
Viktor Was via llvm-dev
llvm-dev at lists.llvm.org
Thu Jul 12 05:55:36 PDT 2018
I'm building the plugin from inside the LLVM directory structure (LLVMBuild?).
I haven't changed any compile options and looking into the build.ninja
the flags for my plugin files match the flags of other files with
-fno-rtti being set.
So that's not it, unfortunately.
Viktor
Quoting Philip Pfaffe <philip.pfaffe at gmail.com>:
> No quite, that's the _vtable_ for cl::opt<...>. Are you loading a library
> that's built with RTTI in an LLVM linked without?
>
> Philip
>
> On Thu, Jul 12, 2018 at 2:20 AM Viktor Was <gs15m015 at technikum-wien.at>
> wrote:
>
>> Hi Philip,
>>
>> thanks for the quick answer.
>> That makes sense, but when leaving the set LLVM_LINK_COMPONENTS out
>> I get an undefined symbol when loading the plugin:
>>
>> _ZTVN4llvm2cl3optINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0ENS0_6parserIS7_EEEE
>>
>> which boils down to
>>
>> llvm::cl::opt<std::__cxx11::basic_string<char, std::char_traits<char>,
>> std::allocator<char>>, false,
>> llvm::cl::parser<std::__cxx11::basic_string<char,
>> std::char_traits<char>, std::allocator<char>>>>
>>
>> aka
>>
>> llvm::cl::opt<std::string, false, llvm::cl::parser<std::string>>
>>
>> I guess...
>>
>> any ideas?
>>
>> Viktor
>>
>> Quoting Philip Pfaffe <philip.pfaffe at gmail.com>:
>>
>> > Hi Viktor,
>> >
>> > I believe you shouldn't set LLVM_LINK_COMPONENTS.
>> >
>> > You don't need to link your TestPass against anything since opt is
>> expected
>> > to have everything loaded already. If you're linking against a statically
>> > built LLVM, then this way you'll pull in other definitions of
>> cl::opt'ions,
>> > which'll then clash with the ones that are in opt.
>> >
>> > Cheers,
>> > Philip
>> >
>> > On Tue, Jul 10, 2018 at 3:26 PM Viktor Was via llvm-dev <
>> > llvm-dev at lists.llvm.org> wrote:
>> >
>> >> Hi,
>> >> I'm working on an LLVM Pass plugin and I'm running into a problem when
>> >> loading it into opt.
>> >> I want to have a custom option for my pass and added an llvm::cl::opt
>> >> #include'ing "llvm/Support/CommandLine.h"
>> >>
>> >> linking the dependant libs causes the following error when loading it
>> >> with opt:
>> >> opt: CommandLine Error: Option 'debug-pass' registered more than once!
>> >>
>> >> I narrowed it down to the Core lib but without it I get this
>> >>
>> >> opt:
>> >>
>> /home/qwert/projects/ext/repos/llvm/6.0.0/lib/Support/CommandLine.cpp:281:
>> >>
>> >> void (anonymous
>> >> namespace)::CommandLineParser::registerCategory(llvm::cl::OptionCategory
>> >> *):
>> >> Assertion `count_if(RegisteredOptionCategories, [cat](const
>> >> OptionCategory *Category) { return cat->getName() ==
>> >> Category->getName(); }) == 0 && "Duplicate option categories"' failed.
>> >> LLVMSymbolizer: error reading file: No such file or directory
>> >> #0 0x0000000001d8eea4 (opt+0x1d8eea4)
>> >> #1 0x0000000001d8f206 (opt+0x1d8f206)
>> >> #2 0x00007fb283220390 __restore_rt
>> >> (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
>> >> #3 0x00007fb2821cd428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428)
>> >> #4 0x00007fb2821cf02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a)
>> >> #5 0x00007fb2821c5bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7)
>> >> #6 0x00007fb2821c5c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
>> >> #7 0x0000000001d2b2a9 (opt+0x1d2b2a9)
>> >> #8 0x00007fb281efebc2 _GLOBAL__sub_I_CommandLine.cpp
>> >>
>> >>
>> (/home/qwert/projects/ext/projects/cmake/llvm/6.0.0/lib/TestPass.so+0x28bc2)
>> >> #9 0x00007fb28343c6ba (/lib64/ld-linux-x86-64.so.2+0x106ba)
>> >> #10 0x00007fb28343c7cb (/lib64/ld-linux-x86-64.so.2+0x107cb)
>> >> #11 0x00007fb2834418e2 (/lib64/ld-linux-x86-64.so.2+0x158e2)
>> >> #12 0x00007fb28343c564 (/lib64/ld-linux-x86-64.so.2+0x10564)
>> >> #13 0x00007fb283440da9 (/lib64/ld-linux-x86-64.so.2+0x14da9)
>> >> #14 0x00007fb282e03f09 __asprintf
>> (/lib/x86_64-linux-gnu/libdl.so.2+0xf09)
>> >> #15 0x00007fb28343c564 (/lib64/ld-linux-x86-64.so.2+0x10564)
>> >> #16 0x00007fb282e04571 (/lib/x86_64-linux-gnu/libdl.so.2+0x1571)
>> >> #17 0x00007fb282e03fa1 dlopen (/lib/x86_64-linux-gnu/libdl.so.2+0xfa1)
>> >> #18 0x0000000001d7b88b (opt+0x1d7b88b)
>> >> #19 0x0000000001d44de9 (opt+0x1d44de9)
>> >> #20 0x000000000069f0b4 (opt+0x69f0b4)
>> >> #21 0x0000000001d35a91 (opt+0x1d35a91)
>> >> #22 0x0000000001d2e3b9 (opt+0x1d2e3b9)
>> >> #23 0x00000000006958b4 (opt+0x6958b4)
>> >> #24 0x00007fb2821b8830 __libc_start_main
>> >> (/lib/x86_64-linux-gnu/libc.so.6+0x20830)
>> >> #25 0x0000000000686be9 (opt+0x686be9)
>> >> Stack dump:
>> >> 0. Program arguments: opt -load
>> >> /home/maliusarth/projects/ext/projects/cmake/llvm/6.0.0/lib/TestPass.so
>> >> -testPass test.cpp
>> >> Aborted
>> >>
>> >>
>> >> in my cmakelists.txt I have the following:
>> >>
>> >> set(CMAKE_BUILD_TYPE Debug)
>> >>
>> >> set(LLVM_LINK_COMPONENTS
>> >> Core # narrowed it down to this
>> >> BinaryFormat
>> >> Support
>> >> Demangle
>> >> )
>> >>
>> >> add_llvm_loadable_module( TestPass
>> >> TestPass.cpp
>> >>
>> >> DEPENDS
>> >> intrinsics_gen
>> >> PLUGIN_TOOL
>> >> opt
>> >> )
>> >>
>> >> in my cpp I have this:
>> >>
>> >> #include "llvm/IR/Constants.h"
>> >> #include "llvm/IR/Function.h"
>> >> #include "llvm/IR/Module.h"
>> >> #include "llvm/IR/PassManager.h"
>> >> #include "llvm/Support/raw_ostream.h"
>> >> #include "llvm/Support/CommandLine.h"
>> >>
>> >> #include <string>
>> >>
>> >> namespace
>> >> {
>> >> // Apply a custom category to all command-line options so that they are
>> the
>> >> // only ones displayed.
>> >> static llvm::cl::OptionCategory testCategory("testPass Options");
>> >>
>> >> static llvm::cl::opt<std::string>
>> >> testOpt("testOpt", llvm::cl::desc("testOpt"),
>> >> llvm::cl::value_desc("test pass opt"),
>> >> llvm::cl::cat(testCategory));
>> >> }
>> >>
>> >> namespace test
>> >> {
>> >> char TestPass::ID = 0;
>> >>
>> >> static ::llvm::RegisterPass<test::TestPass>
>> >> X("testPass", "test pass", false /* Only looks at CFG */,
>> >> false /* Analysis Pass */);
>> >> }
>> >>
>> >> the rest of the file is more or less straight out of the Hello example.
>> >>
>> >> I'm working with this llvm version
>> >> http://llvm.org/svn/llvm-project/llvm/tags/RELEASE_600/final
>> >>
>> >> I'd appreciate any help on this issue.
>> >>
>> >> Viktor
>> >>
>> >> _______________________________________________
>> >> LLVM Developers mailing list
>> >> llvm-dev at lists.llvm.org
>> >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>> >>
>>
>>
>>
>>
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