pytorch/torch/csrc/jit/python_tracer.cpp
Zachary DeVito b7487d42a0
Workaround to make PythonOps traced with torch.jit.trace work correctly. (#6738)
The long-term fix is to remove the handling-creating pathways and
remove all the modes from PythonOp making it into an op that simply
calls a PyObject. Right now ONNX expects PythonOp to hold a
nn.Function, not a generic callable, so completely removing the legacy
pathway will also require changes to how ONNX symbolics are found.
2018-04-24 17:21:00 -07:00

77 lines
2.5 KiB
C++

#include "torch/csrc/python_headers.h"
#include "torch/csrc/jit/python_tracer.h"
#include "torch/csrc/jit/tracer.h"
#include "torch/csrc/assertions.h"
#include "torch/csrc/jit/export.h"
#include "torch/csrc/jit/pybind.h"
#include "torch/csrc/utils/python_strings.h"
#include <sstream>
using namespace torch::autograd;
using namespace torch::jit;
using namespace torch::jit::tracer;
namespace torch { namespace jit {
#define ASSERT_UNEXPIRED(METHOD_NAME) if (s.is_expired()) throw std::runtime_error("calling " METHOD_NAME " on an expired trace")
void initPythonTracerBindings(PyObject* module_) {
auto m = py::handle(module_).cast<py::module>();
py::class_<TracingState,std::shared_ptr<TracingState>>(m, "TracingState", py::dynamic_attr())
// NB: no constructor; you have to get it from C++ code
.def("__repr__", [](const TracingState& s) {
std::ostringstream ss;
ss << "<TracingState " << (const void*)&s << ">";
return ss.str();
})
.def("__str__", [](const TracingState& s) -> std::string {
if (s.is_expired()) return "<expired TracingState>";
std::ostringstream ss;
ss << *s.graph;
return ss.str();
})
.def("push_scope", [](TracingState& s, const std::string& scope_name) {
ASSERT_UNEXPIRED("push_scope");
s.push_scope(scope_name);
})
.def("pop_scope", [](TracingState& s) {
ASSERT_UNEXPIRED("pop_scope");
s.pop_scope();
})
.def("set_graph", [](TracingState& s, std::shared_ptr<Graph> g) {
s.graph = g;
})
.def("graph", [](TracingState& s) {
return s.graph;
})
.def_property_readonly("is_expired", [](TracingState& s) {
return s.is_expired();
})
.def_property_readonly("is_complete", [](TracingState& s) {
return s.is_complete();
});
m.def("_tracer_enter", [](variable_list trace_inputs, std::size_t num_backwards) {
return tracer::enter(std::move(trace_inputs), num_backwards + 1, true);
});
m.def("_tracer_exit", [](variable_list var_outputs) {
tracer::exit(var_outputs);
});
m.def("_get_tracing_state", [](const variable_list& vars) {
return getTracingState(vars);
});
m.def("_get_value_trace", [](std::shared_ptr<TracingState>& state, const Variable& var) {
return getValueTrace(state, var);
});
m.def("_set_value_trace", [](std::shared_ptr<TracingState>& state, const Variable& var, Value* value) {
return setValueTrace(state, var, value);
});
m.def("_is_tracing", [](const variable_list& vars) {
return isTracingVar(vars);
});
}
}} // namespace torch::jit