Summary:
Currently there is a mismatch in naming between Python BatchNorm `running_var` and C++ BatchNorm `running_variance`, which causes JIT model parameters loading to fail (pytorch/vision#728 (comment)):
```
terminate called after throwing an instance of 'c10::Error'
  what():  No such serialized tensor 'running_variance' (read at /home/shahriar/Build/pytorch/torch/csrc/api/src/serialize/input-archive.cpp:27)
frame #0: c10::Error::Error(c10::SourceLocation, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x85 (0x7f2d92d32f95 in /usr/local/lib/libc10.so)
frame #1: torch::serialize::InputArchive::read(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, at::Tensor&, bool) + 0xdeb (0x7f2d938551ab in /usr/local/lib/libtorch.so.1)
frame #2: torch::nn::Module::load(torch::serialize::InputArchive&) + 0x98 (0x7f2d9381cd08 in /usr/local/lib/libtorch.so.1)
frame #3: torch::nn::Module::load(torch::serialize::InputArchive&) + 0xf9 (0x7f2d9381cd69 in /usr/local/lib/libtorch.so.1)
frame #4: torch::nn::Module::load(torch::serialize::InputArchive&) + 0xf9 (0x7f2d9381cd69 in /usr/local/lib/libtorch.so.1)
frame #5: torch::nn::operator>>(torch::serialize::InputArchive&, std::shared_ptr<torch::nn::Module> const&) + 0x32 (0x7f2d9381c7b2 in /usr/local/lib/libtorch.so.1)
frame #6: <unknown function> + 0x2b16c (0x5645f4d1916c in /home/shahriar/Projects/CXX/build-TorchVisionTest-Desktop_Qt_5_12_1_GCC_64bit-Debug/TorchVisionTest)
frame #7: <unknown function> + 0x27a3c (0x5645f4d15a3c in /home/shahriar/Projects/CXX/build-TorchVisionTest-Desktop_Qt_5_12_1_GCC_64bit-Debug/TorchVisionTest)
frame #8: <unknown function> + 0x2165c (0x5645f4d0f65c in /home/shahriar/Projects/CXX/build-TorchVisionTest-Desktop_Qt_5_12_1_GCC_64bit-Debug/TorchVisionTest)
frame #9: <unknown function> + 0x1540b (0x5645f4d0340b in /home/shahriar/Projects/CXX/build-TorchVisionTest-Desktop_Qt_5_12_1_GCC_64bit-Debug/TorchVisionTest)
frame #10: __libc_start_main + 0xf3 (0x7f2d051dd223 in /usr/lib/libc.so.6)
frame #11: <unknown function> + 0x1381e (0x5645f4d0181e in /home/shahriar/Projects/CXX/build-TorchVisionTest-Desktop_Qt_5_12_1_GCC_64bit-Debug/TorchVisionTest)
```
Renaming C++ BatchNorm `running_variance` to `running_var` should fix this problem.

This is a BC-breaking change, but it should be easy for end user to rename `running_variance` to `running_var` in their call sites.
Pull Request resolved: pytorch#17371

Reviewed By: goldsborough

Differential Revision: D14172775

Pulled By: yf225

fbshipit-source-id: b9d3729ec79272a8084269756f28a8f7c4dd16b6

…7b7558 (pytorch#18070)

Summary:
Pull Request resolved: pytorch#18070

Previous import was d1f45b1a2b1585d0e9bc65e15e463db344fc3ff6

Included changes:
- **[2bcc406](houseroad/foxi@2bcc406)**: Merge pull request #7 from jackm321/tracing_fixes <Jack Montgomery>
- **[c39033c](houseroad/foxi@c39033c)**: Fixes for tracing events <Jack Montgomery>
- **[50912cf](houseroad/foxi@50912cf)**: Merge pull request #5 from jackm321/add_trace_events <Jack Montgomery>
- **[ba2fdcb](houseroad/foxi@ba2fdcb)**: Merge pull request #5 from jackm321/add_trace_events <Jack Montgomery>
- **[7d42b12](houseroad/foxi@7d42b12)**: address comments <Jack Montgomery>
- **[dcabd8d](houseroad/foxi@dcabd8d)**: Add trace events interface <Jack Montgomery>

Reviewed By: houseroad

Differential Revision: D14483201

fbshipit-source-id: f51ed869c9a89521079df89903abc0ac0a45ac7b

Summary:
Tracing models which attempts to return this in-place value doesn't turn out well.

I haven't run any tests to confirm the results to be honest, but regardless of the outcome, the operation happens in-place, so it should work as before.

Sample output from traced model attempting to set `max_norm` on `Embedding`:
```
a leaf Variable that requires grad has been used in an in-place operation. (check_inplace at /pytorch/torch/csrc/autograd/VariableTypeUtils.h:49)
frame #0: std::function<std::string ()>::operator()() const + 0x11 (0x7f0ecc5cc021 in /usr/local/lib/python3.7/site-packages/torch/lib/libc10.so)
frame #1: c10::Error::Error(c10::SourceLocation, std::string const&) + 0x2a (0x7f0ecc5cb8ea in /usr/local/lib/python3.7/site-packages/torch/lib/libc10.so)
frame #2: <unknown function> + 0x38ab2f (0x7f0ecb55ab2f in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #3: torch::autograd::VariableType::embedding_renorm_(at::Tensor&, at::Tensor const&, double, double) const + 0x76 (0x7f0ecb5b5966 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #4: <unknown function> + 0x56c958 (0x7f0ecb73c958 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #5: <unknown function> + 0x672286 (0x7f0ecb842286 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #6: torch::jit::InterpreterState::run(std::vector<c10::IValue, std::allocator<c10::IValue> >&) + 0x22 (0x7f0ecb83d842 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #7: <unknown function> + 0x65c6ac (0x7f0ecb82c6ac in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch.so.1)
frame #8: <unknown function> + 0x3c8ab4 (0x7f0f06bc0ab4 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch_python.so)
frame #9: <unknown function> + 0x3ad2c3 (0x7f0f06ba52c3 in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch_python.so)
frame #10: <unknown function> + 0x11663e (0x7f0f0690e63e in /usr/local/lib/python3.7/site-packages/torch/lib/libtorch_python.so)
<omitting python frames>
frame #39: python_call + 0x11 (0x5563c3c521c1 in uwsgi)
frame #40: uwsgi_request_wsgi + 0x100 (0x5563c3c54410 in uwsgi)
frame #41: wsgi_req_recv + 0xac (0x5563c3becabc in uwsgi)
frame #42: simple_loop_run + 0xc4 (0x5563c3c35be4 in uwsgi)
frame #43: simple_loop + 0x10 (0x5563c3c35a00 in uwsgi)
frame #44: uwsgi_ignition + 0x241 (0x5563c3c3a3a1 in uwsgi)
frame #45: uwsgi_worker_run + 0x275 (0x5563c3c3ec35 in uwsgi)
frame #46: <unknown function> + 0x8f22c (0x5563c3c3f22c in uwsgi)
frame #47: <unknown function> + 0x3c13e (0x5563c3bec13e in uwsgi)
frame #48: __libc_start_main + 0xf1 (0x7f0f138922e1 in /lib/x86_64-linux-gnu/libc.so.6)
frame #49: _start + 0x2a (0x5563c3bec16a in uwsgi)
:
operation failed in interpreter:
op_version_set = 0
def forward(self,
    input_1: Tensor) -> Tensor:
  _0 = torch.norm(self.item_embedding.weight, 2, 1, True)
  _1 = torch.div(self.item_embedding.weight, _0)
  m_weight = torch.t(_1)
  input_2 = torch.contiguous(input_1)
  weight_1 = torch.embedding_renorm_(self.item_embedding.weight, input_2, 1., 2.)
             ~~~~~~~~~~~~~~~~~~~~~~~ <--- HERE
  x = torch.embedding(weight_1, input_2, -1, False, False)
  input_3 = torch.div(x, torch.norm(x, 2, 2, True))
  max_batch_size = ops.prim.NumToTensor(torch.size(input_3, 0))
  hx = torch.zeros([2, int(max_batch_size), 70], dtype=6, layout=0, device=torch.device("cpu"))
  _2 = [self.lstm_layer.weight_ih_l0, self.lstm_layer.weight_hh_l0, self.lstm_layer.weight_ih_l1, self.lstm_layer.weight_hh_l1]
  input_4, _3, _4 = torch.lstm(input_3, [hx, hx], _2, False, 2, 0.10000000000000001, False, False, True)
  input = torch.matmul(input_4, torch.t(self.rnn2item.weight))
  tastevec = torch.div(input, torch.norm(input, 2, 2, True))
  outputs = torch.matmul(tastevec, m_weight)
```
Pull Request resolved: pytorch#18684

Differential Revision: D14782041

Pulled By: ezyang

fbshipit-source-id: 7b2fc19b7d5b6600263644498bb728319a19f39d

Summary:
We have encountered `std::bad_cast` error when running PyTorch binary built with cxx11 abi on CentOS7, stack trace:
```
#0  0x00007fec10160207 in raise () from /lib64/libc.so.6
#1  0x00007fec101618f8 in abort () from /lib64/libc.so.6
#2  0x00007fec015767d5 in __gnu_cxx::__verbose_terminate_handler() () from /lib64/libstdc++.so.6
#3  0x00007fec01574746 in ?? () from /lib64/libstdc++.so.6
#4  0x00007fec01574773 in std::terminate() () from /lib64/libstdc++.so.6
#5  0x00007fec01574993 in __cxa_throw () from /lib64/libstdc++.so.6
#6  0x00007fec015c94d2 in std::__throw_bad_cast() () from /lib64/libstdc++.so.6
#7  0x00007feb2ab3c2d7 in std::__cxx11::numpunct<char> const& std::use_facet<std::__cxx11::numpunct<char> >(std::locale const&) ()
   from /root/.local/lib/python2.7/site-packages/torch/lib/libcaffe2.so
#8  0x00007feb28643d62 in torch::jit::script::strtod_c(char const*, char**) () from /root/.local/lib/python2.7/site-packages/torch/lib/libcaffe2.so
```

We are suspecting this line will get compiled to gcc abi dependent symbol:
```
char decimal_point = std::use_facet<std::numpunct<char>>(std::locale()).decimal_point();
```
Pull Request resolved: pytorch#21293

Differential Revision: D15609910

Pulled By: bddppq

fbshipit-source-id: e247059729863868e4b36d6fec4fcbc36fbc4bb1

…ytorch#63339)

Summary:
Pull Request resolved: pytorch#63339

# Context
https://fb.workplace.com/groups/pytorch.dev/permalink/900474523864362/?comment_id=901125403799274&reply_comment_id=905023386742809

##### WHAT IS A STACK TRACE?
A stack trace (also called stack backtrace or stack traceback) is a report of the active stack frames at a certain point in time during the execution of a program.

Typically when an exception is thrown, one would expect to see the code (file:line) that threw the exception, and every intermediate frame up to and including the main function.

We are enabling android stack trace to help debugging on android devices.

Test Plan:
## Steps to test
```
buck build fbsource//xplat/caffe2/mode/aibench_pytorch_android -c pt.enable_qpl=0 -c pt.has_backtraces=1 fbsource//xplat/caffe2/fb/lite_predictor:lite_predictorAndroid#android-x86_64

one_world android emulator android-28

adb push ~/fbsource/buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictorAndroid#android-x86_64 /data/local/tmp

cd /data/local/tmp
./lite_predictorAndroid#android-x86_64

./lite_predictorAndroid#android-x86_64 --model ./detect.bc --input_dims "1,3,192,192" --input_type float --warmup 20 --iter 5 --report_pep true
```

## See how model file is not found stack traces is:

### before
```
./lite_predictorAndroid#android-x86_64 --model ./detect.bc --input_dims "1,3,192,192" --input_type float --warmup 20 --iter 5 --report_pep true

Run with 2 threads
Run with 2 threads
Loading model...
terminating with uncaught exception of type c10::Error: open file failed, file path: ./detect.bc
Exception raised from RAIIFile at xplat/caffe2/caffe2/serialize/file_adapter.cc:13 (most recent call first):
(no backtrace available)
Aborted
```

### after
```
134|generic_x86_64:/data/local/tmp $ ./lite_predictorAndroid#android-x86_64 --model ./detect.bc --input_dims "1,3,192,192" --input_type float --warmup 20 --iter 5 --report_pep true
Run with 2 threads
Run with 2 threads
Loading model...
terminating with uncaught exception of type c10::Error: open file failed, file path: ./detect.bc
Exception raised from RAIIFile at xplat/caffe2/caffe2/serialize/file_adapter.cc:13 (most recent call first):
 frame #0       c10::get_backtrace(unsigned long, unsigned long, bool)[0x59494274f10e]
 frame #1       [0x5949427b1eee]
 frame #2       [0x5949427b1eb2]
 frame #3       [0x5949427b1cdc]
 frame #4       std::__ndk1::function<std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > ()>::operator()() const[0x5949427afc34]
 frame #5       c10::Error::Error(c10::SourceLocation, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> >)[0x5949427b05b1]
 frame #6       c10::detail::torchCheckFail(char const*, char const*, unsigned int, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&)[0x5949427aca5f]
 frame #7       caffe2::serialize::FileAdapter::RAIIFile::RAIIFile(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&)[0x5949426b37b2]
 frame #8       caffe2::serialize::FileAdapter::FileAdapter(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&)[0x5949426b3903]
 frame #9       torch::jit::_load_for_mobile(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, c10::optional<c10::Device>, std::__ndk1::unordered_map<std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> >, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> >, std::__ndk1::hash<std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > >, std::__ndk1::equal_to<std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > >, std::__ndk1::allocator<std::__ndk1::pair<std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > > > >&)[0x5949422737bd]
 frame #10      torch::jit::_load_for_mobile(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, c10::optional<c10::Device>)[0x594942273769]
 frame #11      benchmark(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, int, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, bool, int, int, int, bool, int, bool, int, double, bool, bool, bool, std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&)[0x59494189b21d]
 frame #12      main[0x594941882aff]
 frame #13      __libc_init[0x7b699d08578d]
```

### what we get for os:linux
```
(base) [[email protected] /data/users/pavithran/fbsource] ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor --model ./detect.bc --input_dims "1,3,192,192" --input_type float --warmup 20 --iter 5 --report_pep true
Run with 24 threads
Run with 24 threads
Loading model...
terminate called after throwing an instance of 'c10::Error'
  what():  open file failed, file path: ./detect.bc
Exception raised from RAIIFile at xplat/caffe2/caffe2/serialize/file_adapter.cc:13 (most recent call first):
frame #0: ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor() [0x20cb7fe]
frame #1: ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor() [0x20cb6c6]
frame #2: std::function<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > ()>::operator()() const + 0x54 (0x20ca4e4 in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #3: c10::Error::Error(c10::SourceLocation, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) + 0x57 (0x20ca9a7 in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #4: c10::detail::torchCheckFail(char const*, char const*, unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x7a (0x20c823a in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #5: caffe2::serialize::FileAdapter::RAIIFile::RAIIFile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x96 (0x206f3d6 in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #6: caffe2::serialize::FileAdapter::FileAdapter(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x42 (0x206f502 in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #7: torch::jit::_load_for_mobile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, c10::optional<c10::Device>, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&) + 0x30 (0x1be826c in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #8: torch::jit::_load_for_mobile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, c10::optional<c10::Device>) + 0x35 (0x1be8214 in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #9: benchmark(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, int, int, int, bool, int, bool, int, double, bool, bool, bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x16d (0x12093ad in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #10: main + 0x25c (0x11f933c in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)
frame #11: __libc_start_main + 0x105 (0x7fc7b9f2ed95 in /usr/local/fbcode/platform009/lib/libc.so.6)
frame #12: _start + 0x2a (0x11f902a in ./buck-out/gen/xplat/caffe2/fb/lite_predictor/lite_predictor)

Aborted (core dumped)
````

Reviewed By: dhruvbird

Differential Revision: D30135947

fbshipit-source-id: f50c634ef4545843305cad4b4a14a8776b1aec76