[lldb-dev] Problems running the lldb tests on Fedora Core 20 - 64bit (email originally titled "Add kalimba as a platform.")
Matthew Gardiner
mg11 at csr.com
Mon Jul 21 23:01:56 PDT 2014
More investigating reveals that it is finish-swig-Python-LLDB.sh which
is lldb's responsible script. (Thanks for the -x reminder, Zachary!).
The line in the script is
framework_python_dir=`${PYTHON} -c "from distutils.sysconfig import
get_python_lib; print get_python_lib(True, False,
\"${PYTHON_INSTALL_DIR}\");"`/lldb
When I run the raw invocation at my shell:
$ /usr/bin/python -c 'from distutils.sysconfig import get_python_lib;
print get_python_lib(True, False, "/home/mg11/src/p4play/build");'
/home/mg11/src/p4play/build/lib64/python2.7/site-packages
So, we might suspect that FC20s python install is wrong.
However, I downloaded python-2.7.7 and built from source, with a pretty
much a raw config (only configure tweaks being enable shared and
threads), and I get a similar output:
$ /usr/local/Python-2.7.7/bin/python -c 'from distutils.sysconfig import
get_python_lib; print get_python_lib(True, False,
"/home/mg11/src/p4play/build");'
/home/mg11/src/p4play/build/lib64/python2.7/site-packages
I may well be sticking my neck out a bit here... but I'm wondering if
lib64 is actually the __right__ answer here (given my 64-bit host). Is
python trying to support 32-bit binaries in lib and 64-bit ones in lib64
or something?
(For *NIX 64-bit builds should our llvm/lldb binaries go in lib64? not lib)
I'm curious as to what people think here... so we can engineer as nice a
fix as possible.
Matt
Todd Fiala wrote:
> Hey Matthew,
>
> Great investigating! Glad you were able to at least find the core of
> the issue, which does look like at least on Fedora Core 20 x86_64 we
> are doing something funky with configure/make. I'm not sure why we're
> choosing lib64 there and lib on Ubuntu 14.04 x86_64, might have to do
> with how the python is configured. I think that directory may be
> coming from a helper library in python that determines the correct
> location for build output and has to do with some Python finalizer
> scripts during the build process. I won't be totally surprised if
> this might just be broken on Fedora Core x86_64 regardless of cmake or
> configure-based builds.
>
> I'll do a configure/make build on Ubuntu 14.04 x86_64 later today to
> see if I'm getting the same results on configure/make - there has been
> some changes in python handling more recently, generally to support
> Windows builds, but we may have unintentionally introduced that via
> those changes. At least that way we can see if its consistent with
> configure/make or if it might just be specific to Fedora Core.
>
> Thanks for identifying that!
>
> -Todd
>
>
>
> On Mon, Jul 21, 2014 at 6:51 AM, Matthew Gardiner <mg11 at csr.com
> <mailto:mg11 at csr.com>> wrote:
>
> Todd,
>
> I've since discovered that the cmake/ninja build system also
> results in a lib and lib64 directory, with the liblldb.so and
> other .sos in the lib folder but the python2.7/site-packages/lldb
> under lib64. (In fact with cmake build I see no python2.7 folder
> at all under lib, it's all under lib64).
>
> So Todd, focusing back on autoconf/make builds, after doing the
> ./configure && make in the sibling build directory, do you see for
> your linux 64-bit builds the python2.7/site-packages/lldb under
> the lib64 sub-folder and the lldb/llvm .sos under the lib64
> sub-folder?
>
> How do you get this to work:
>
>
> tfiala at tfiala2:/mnt/ssd/work/macosx.sync/mbp-svn/build-debug/lib$
> PYTHONPATH=`pwd`/python2.7/site-packages python
> Python 2.7.6 (default, Mar 22 2014, 22:59:56)
> [GCC 4.8.2] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import lldb
> >>> dir(lldb)
>
> Do you run another script or make target after doing the basic
> llvm/lldb make? That is to move python2.7/site-packages/lldb
> underneath lib. I think that's what I'd have to do on my system,
> since after the basic make my lib and lib64 directories have the
> following contents:
>
> ~/src/p4play/build/Debug+Asserts/lib/python2.7/site-packages
>
> $ ls -al
> total 32
> drwxrwxr-x 2 mg11 mg11 4096 Jul 21 14:40 .
> drwxrwxr-x 3 mg11 mg11 4096 Jul 21 14:40 ..
> -rwxr-xr-x 1 mg11 mg11 21795 Jul 21 14:40 readline.so
>
> $ cd ../../../lib64/python2.7/site-packages/
>
> ~/src/p4play/build/Debug+Asserts/lib64/python2.7/site-packages
>
> $ ls -al
> total 12
> drwxrwxr-x 3 mg11 mg11 4096 Jul 21 14:42 .
> drwxrwxr-x 3 mg11 mg11 4096 Jul 21 14:42 ..
> drwxrwxr-x 5 mg11 mg11 4096 Jul 21 14:42 lldb
>
>
> Any ideas?
> Matt
>
>
> Matthew Gardiner wrote:
>
> Hi Todd,
>
> Thanks for taking the time to come up with these tips. First
> off my distro is Fedora Core 20 64-bit. So to further my
> investigation I blew away all the sources, and did svn co
> llvm, (lldb clang into llvm/tools), made the sibling build
> dir, then did:
>
> ~/src/p4play/build
> $ ../llvm/configure --enable-targets=x86_64 --enable-shared
> --enable-cxx11 --prefix=`pwd`/../install && make -j 8
>
> After the successful build I do ldd. Basically lld finds all
> dependencies for liblldb.so...
>
> ~/src/p4play/build/Debug+Asserts/lib
> $ ldd liblldb.so
> linux-vdso.so.1 => (0x00007fffa61fe000)
> libLLVM-3.5svn.so <http://libLLVM-3.5svn.so> =>
> /home/mg11/src/p4play/build/Debug+Asserts/lib/./libLLVM-3.5svn.so
> <http://libLLVM-3.5svn.so> (0x00007f2e53405000)
> libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f2e531cc000)
> libdl.so.2 => /lib64/libdl.so.2 (0x00007f2e52fc8000)
> libutil.so.1 => /lib64/libutil.so.1 (0x00007f2e52dc5000)
> libpython2.7.so.1.0 => /lib64/libpython2.7.so.1.0
> (0x00007f2e529fe000)
> librt.so.1 => /lib64/librt.so.1 (0x00007f2e527f6000)
> libedit.so.0 => /lib64/libedit.so.0 (0x00007f2e525ba000)
> libncurses.so.5 => /lib64/libncurses.so.5 (0x00007f2e52392000)
> libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007f2e52168000)
> libpanel.so.5 => /lib64/libpanel.so.5 (0x00007f2e51f64000)
> libz.so.1 => /lib64/libz.so.1 (0x00007f2e51d4d000)
> libm.so.6 => /lib64/libm.so.6 (0x00007f2e51a46000)
> libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f2e5173e000)
> libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f2e51527000)
> libc.so.6 => /lib64/libc.so.6 (0x00007f2e51168000)
> /lib64/ld-linux-x86-64.so.2 (0x0000003675a00000)
>
> However, regarding python loading the lldb bindings I see my
> build/Debug+Asserts has a lib and a lib64 folder.
>
> ~/src/p4play/build/Debug+Asserts
> $ ls
> bin lib lib64
>
> If I try to import lldb when I have "lib" as my PYTHONPATH i.e.
>
> ~/src/main/build/Debug+Asserts/lib
> $ PYTHONPATH=`pwd`/python2.7/site-packages/ python
> >>> import lldb
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ImportError: No module named lldb
> >>>
>
> This is not surprising, since
> ~/src/main/build/Debug+Asserts/lib/python2.7/site-packages/
> only contains readline.so.
> So I cd to lib64. This looks more promising since there is a
> lldb folder below site-packages. So now I do "import lldb"
> with "lib64" instead:
>
> ~/src/main/build/Debug+Asserts/lib64
> $ PYTHONPATH=`pwd`/lib64/python2.7/site-packages/ python
> Python 2.7.5 (default, Feb 19 2014, 13:47:28)
> [GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
> Type "help", "copyright", "credits" or "license" for more
> information.
> >>> import lldb
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/mg11/src/main/build/Debug+Asserts/lib64/python2.7/site-packages/lldb/__init__.py",
> line 52, in <module>
> _lldb = swig_import_helper()
> File
> "/home/mg11/src/main/build/Debug+Asserts/lib64/python2.7/site-packages/lldb/__init__.py",
> line 44, in swig_import_helper
> import _lldb
> ImportError: No module named _lldb
> >>>
>
> So cd to
> ~/src/p4play/build/Debug+Asserts/lib64/python2.7/site-packages/lldb,
> and list:
>
> ~/src/p4play/build/Debug+Asserts/lib64/python2.7/site-packages/lldb
> $ ls -l
> total 1196
> -rw-rw-r-- 1 mg11 mg11 3905 Jul 21 08:25 embedded_interpreter.py
> drwxrwxr-x 3 mg11 mg11 4096 Jul 21 08:25 formatters
> -rw-rw-r-- 1 mg11 mg11 495675 Jul 21 08:25 __init__.py
> -rw-rw-r-- 1 mg11 mg11 708200 Jul 21 09:09 __init__.pyc
> lrwxrwxrwx 1 mg11 mg11 19 Jul 21 08:25 _lldb.so ->
> ../../../liblldb.so !BROKEN SYMLINK!
> drwxrwxr-x 2 mg11 mg11 4096 Jul 21 08:25 runtime
> drwxrwxr-x 2 mg11 mg11 4096 Jul 21 08:25 utils
>
> _lldb.so is broken above as the link above assumes liblldb.so
> is just 3 dirs back. However, it isn't - because it's not in
> lib64, *it's in lib*. So it looks like things are getting a
> bit mashed up due to 32-bit/64-bit directory issues. If I copy
> the .so files from lib to lib64, then it fixes my broken
> sym-link issue. And I progress a little further.
>
> ~/src/p4play/build/Debug+Asserts/lib64
> $ PYTHONPATH=`pwd`/python2.7/site-packages python
> Python 2.7.5 (default, Feb 19 2014, 13:47:28)
> [GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
> Type "help", "copyright", "credits" or "license" for more
> information.
> >>> import lldb
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/mg11/src/p4play/build/Debug+Asserts/lib64/python2.7/site-packages/lldb/__init__.py",
> line 52, in <module>
> _lldb = swig_import_helper()
> File
> "/home/mg11/src/p4play/build/Debug+Asserts/lib64/python2.7/site-packages/lldb/__init__.py",
> line 48, in swig_import_helper
> _mod = imp.load_module('_lldb', fp, pathname, description)
> ImportError: libLLVM-3.5svn.so <http://libLLVM-3.5svn.so>:
> cannot open shared object file: No such file or directory
> >>>
>
> So now I push the location of these .sos into my environment
> with LD_LIBRARY_PATH. Finally lldb imports!
>
> ~/src/p4play/build/Debug+Asserts/lib64
> $ LD_LIBRARY_PATH=. PYTHONPATH=`pwd`/python2.7/site-packages
> python
> Python 2.7.5 (default, Feb 19 2014, 13:47:28)
> [GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
> Type "help", "copyright", "credits" or "license" for more
> information.
> >>> import lldb
> >>> dir(lldb)
> ['INT32_MAX', 'LLDB_ARCH_DEFAULT',
> ... lots more ...
> >>>
>
> So, I think the crux of the problem I'm seeing here is that on
> a 64-bit linux build (using autoconf/make) we get the binaries
> distributed around the lib and lib64 sub-folders without
> adequate coordination with the test tools. I'll retry now with
> cmake/ninja and see if my experience differs.
>
> Matt
>
>
>
> Todd Fiala wrote:
>
>
> Hey Matt,
>
> (Adding back the list since these are general
> troubleshooting tips for getting tests running).
>
> Sorry you’re having so much trouble with this!
>
> Ok so a few things to troubleshoot:
>
> Regardless of the build system used, go to the build
> output’s lib dir. Do this command:
> ldd liblldb.so
>
> That will spit out all the shared libraries that your
> liblldb.so is trying to link against. The python message
> your seeing will happen if python can’t find the lldb
> module (as the message suggests and you were tracing
> down), /or/ if it can find it but fails to load it (which
> is often the case - something cannot be found when the
> liblldb.so tries to load as a consequence of the lldb
> python module trying to load).
>
> You should see something that looks roughly like this:
>
> |tfiala at tfiala2:/mnt/ssd/work/macosx.sync/mbp-svn/build-debug/lib$
> ldd liblldb.so
> linux-vdso.so.1 => (0x00007fffe9dfe000)
> libstdc++.so.6 =>
> /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f6357e71000)
> libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6
> (0x00007f6357b6b000)
> libedit.so.2 =>
> /usr/lib/x86_64-linux-gnu/libedit.so.2 (0x00007f635793a000)
> libpanel.so.5 =>
> /usr/lib/x86_64-linux-gnu/libpanel.so.5 (0x00007f6357736000)
> libncurses.so.5 =>
> /lib/x86_64-linux-gnu/libncurses.so.5 (0x00007f6357513000)
> libtinfo.so.5 =>
> /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007f63572e9000)
> libpython2.7.so.1.0 =>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
> (0x00007f6356d82000)
> librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1
> (0x00007f6356b7a000)
> libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2
> (0x00007f6356975000)
> libpthread.so.0 =>
> /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f6356757000)
> libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1
> (0x00007f635653e000)
> libgcc_s.so.1 =>
> /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f6356327000)
> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6
> (0x00007f6355f61000)
> /lib64/ld-linux-x86-64.so.2 (0x00007f635d584000)
> libutil.so.1 =>
> /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f6355d5d000)
> tfiala at tfiala2:/mnt/ssd/work/macosx.sync/mbp-svn/build-debug/lib$site-packages
>
> |
>
> The left side shows the short name that the .so is
> referencing. The right side shows what the loader actually
> mapped it to with the current environment. If there is a
> problem loading liblldb.so, this will show as (I think)
> question marks on the right side indicating that the
> shared library linkage was not found. Let me know if you
> see something like that.
>
> If you get past this part and you don’t see any issues,
> the next thing to try is:
> PYTHONPATH=/path/to/your/lldb/lib/python2.7/site-packages
> python
> Then do an ‘import lldb’, then a ‘dir (lldb)’, like so:
>
> |tfiala at tfiala2:/mnt/ssd/work/macosx.sync/mbp-svn/build-debug/lib$
> PYTHONPATH=`pwd`/python2.7/site-packages python
> Python 2.7.6 (default, Mar 22 2014, 22:59:56)
> [GCC 4.8.2] on linux2
> Type "help", "copyright", "credits" or "license" for more
> information.
> >>> import lldb
> >>> dir(lldb)
> ['INT32_MAX', 'LLDB_ARCH_DEFAULT',
> 'LLDB_ARCH_DEFAULT_32BIT', 'LLDB_ARCH_DEFAULT_64BIT',
> 'LLDB_DEFAULT_BREAK_SIZE', 'LLDB_DEFAULT_SHELL',
> 'LLDB_GENERIC_ERROR', 'LLDB_INVALID_ADDRESS',
> 'LLDB_INVALID_BREAK_ID', 'LLDB_INVALID_CPUTYPE',
> 'LLDB_INVALID_FRAME_ID', 'LLDB_INVALID_IMAGE_TOKEN',
> 'LLDB_INVALID_INDEX32', 'LLDB_INVALID_IVAR_OFFSET',
> 'LLDB_INVALID_LINE_NUMBER', 'LLDB_INVALID_MODULE_VERSION',
> 'LLDB_INVALID_OFFSET', 'LLDB_INVALID_PROCESS_ID',
> 'LLDB_INVALID_QUEUE_ID', 'LLDB_INVALID_REGNUM',
> 'LLDB_INVALID_SIGNAL_NUMBER', 'LLDB_INVALID_THREAD_ID',
> 'LLDB_INVALID_UID', 'LLDB_INVALID_WATCH_ID',
> 'LLDB_MAX_NUM_OPTION_SETS', 'LLDB_OPT_SET_1',
>
> ... (lots of stuff removed)
> |
>
> That will tell you if you can load the lldb module when
> you specify exactly where it should be. If you can do
> this, the tests basically should not have trouble loading
> lldb. (Obviously somewhere we’ll find an issue here). If
> this does work, then we need to trace why the python test
> runner calls are mixing up the python path. In general you
> don’t need to specify any options to the ninja/make
> commands to get the tests to run from the build dir.
>
> Can you refresh my memory on what Linux distro you’re
> using and whether it’s 64 or 32 bit? (I don’t get over to
> the 32-bit distros much these days).
>
> I hope that gets us closer to finding out what’s up! Keep
> me posted.
>
> -Todd
>
>
>
>
> On Fri, Jul 18, 2014 at 4:56 AM, Matthew Gardiner
> <mg11 at csr.com <mailto:mg11 at csr.com> <mailto:mg11 at csr.com
> <mailto:mg11 at csr.com>>> wrote:
>
> Hi Todd,
>
> Well I managed to get cmake and ninja working! I
> needed (it would
> appear) to download/build/install the latest versions
> of both from
> source. Then I do:
>
> build $ cmake ../llvm/ -G Ninja
> -DLLVM_TARGETS_TO_BUILD="X86"
> -DBUILD_SHARED_LIBS=ON -DLLVM_ENABLE_CXX1Y=ON
> ...
> build $ ninja
> ...
>
> However "ninja check-lldb" still fails to find
> lldb.py. It is does
> get built, but the path which dotest.py uses to find
> it is wrong
> on my system. Anyway, I'm going to continue trying to
> analyse it
> myself for now. I'll probably post a new thread to
> lldb-dev if I
> continue to struggle.
>
> Anyway, have a good weekend,
> Matt
>
>
>
>
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> --
> Todd Fiala | Software Engineer | tfiala at google.com
> <mailto:tfiala at google.com> <mailto:tfiala at google.com
> <mailto:tfiala at google.com>> | 650-943-3180 <tel:650-943-3180>
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