Package: python-llvm
Version: 0.12.6-2
Severity: important
Dear Maintainer,
python-llvm (llvm-py upstream) has been giving me quite a few issues
lately.
I wrote a quick test to see how easy it would be to generate some code
with it, and kept getting segfaults. That was a red flag right away;
python code shouldn't ever segfault unless you're doing something
strange.
I boiled it down to a MWE, attached below with some notes on where
segfaults happen. I also ran a backtrace with gdb to see where it was
segfaulting, although I didn't do any digging through source files to
see where improper checking/other bugs might be.
-- System Information:
Debian Release: jessie/sid
APT prefers testing-updates
APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 3.14-1-686-pae (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages python-llvm depends on:
ii libc6 2.19-7
ii libffi6 3.1-2
ii libgcc1 1:4.9.1-4
ii libllvm3.4 1:3.4.2-6
ii libstdc++6 4.9.1-4
ii libtinfo5 5.9+20140712-2
ii python 2.7.8-1
python-llvm recommends no packages.
python-llvm suggests no packages.
-- no debconf information
*** /home/rwb/python/parse/test.py
import llvm.core as llvm
module = llvm.Module.new(main)
int = llvm.Type.int()
func = llvm.Function.new(module, int, main)
block = func.append_basic_block(entry)
builder = llvm.Builder.new(block)
# Segfault.
# print(func)
left = llvm.Constant.int(int, 1)
right = llvm.Constant.int(int, 1)
print(left)
print(right)
tmp = builder.add(left, right, tmp)
# Segfault.
# print(block)
# Unclear if this should be 0 or 1.
print(len(block.instructions))
builder.ret(tmp)
print(len(block.instructions))
print(block.instructions[0].opcode_name)
# Segfault.
print(block.instructions[0])
*** /home/rwb/python/parse/gdb.txt
Starting program: /usr/bin/python test.py
warning: Could not load shared library symbols for linux-gate.so.1.
Do you need set solib-search-path or set sysroot?
[Thread debugging using libthread_db enabled]
Using host libthread_db library
/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1.
Program received signal SIGSEGV, Segmentation fault.
0xb60aec55 in llvm::Function::BuildLazyArguments() const () from
/usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#0 0xb60aec55 in llvm::Function::BuildLazyArguments() const () from
/usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#1 0xb613fc25 in llvm::TypeFinder::run(llvm::Module const, bool) ()
from /usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#2 0xb604f32a in llvm::TypePrinting::incorporateTypes(llvm::Module const) ()
from /usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#3 0xb6051ac7 in llvm::AssemblyWriter::init() () from
/usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#4 0xb6051b84 in
llvm::AssemblyWriter::AssemblyWriter(llvm::formatted_raw_ostream,
llvm::SlotTracker, llvm::Module const*, llvm::AssemblyAnnotationWriter*) ()
from /usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#5 0xb6058df1 in llvm::Value::print(llvm::raw_ostream,
llvm::AssemblyAnnotationWriter*) const ()
from /usr/lib/i386-linux-gnu/libLLVM-3.4.so.1
#6 0xb78ff3ed in ?? () from /usr/lib/python2.7/dist-packages/llvmpy/_api.so
#7 0x08104248 in PyEval_EvalFrameEx ()
#8 0x080ff28d in PyEval_EvalCodeEx ()
#9 0x08101f4b in PyEval_EvalFrameEx ()
#10 0x08118e25 in ?? ()
#11 0x08134317 in ?? ()
#12 0x08107919 in PyEval_CallObjectWithKeywords ()
#13 0x081bf23d in ?? ()
#14 0x0816715c in ?? ()
#15 0x080f3018 in ?? ()
#16 0x0810125f in PyEval_EvalFrameEx ()
#17 0x08118e25 in ?? ()
#18 0x08134317 in ?? ()
#19 0x08107919 in PyEval_CallObjectWithKeywords ()
#20 0x081bf23d in ?? ()
#21 0x08157a97 in PyObject_Str ()
#22 0x08156235 in ?? ()
#23 0x08155ca8 in PyFile_WriteObject ()
#24 0x081059c4 in PyEval_EvalFrameEx ()
#25 0x080ff28d in PyEval_EvalCodeEx ()
#26 0x08132e5c in ?? ()
#27 0x0812a2b8 in PyRun_FileExFlags ()
#28 0x0812948a in PyRun_SimpleFileExFlags ()
#29 0x080d4b74 in Py_Main ()
#30 0x080d45fb in main ()
quit
A debugging session is active.
Inferior 1 [process 24157] will be killed.
Quit anyway? (y or n)
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