fix(//core/conversion/conversionctx): Fix memory leak in conversionctx

[narendasan]

Description

Fixes a memory leak where the IHostMemory container for the produced serialized engine after conversion is not destructed properly.

h/t: @SakodaShintaro

Fixes #375

Type of change

Please delete options that are not relevant and/or add your own.

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes

[github-actions]

There are some changes that do not conform to Python style guidelines:

--- /workspace/py/trtorch/_compiler.py	(original)
+++ /workspace/py/trtorch/_compiler.py	(reformatted)
@@ -157,5 +157,6 @@
    build_info = "TRTorch Version: " + str(__version__) + '\n' + build_info
    return build_info

+
def set_device(gpu_id):
    trtorch._C.set_device(gpu_id)
Reformatting /workspace/py/trtorch/_compile_spec.py
Reformatting /workspace/py/trtorch/_types.py
Reformatting /workspace/py/trtorch/_compiler.py
Reformatting /workspace/py/trtorch/logging.py
Reformatting /workspace/py/trtorch/__init__.py
Reformatting /workspace/py/setup.py
ERROR: Some files do not conform to style guidelines

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

There are some changes that do not conform to Python style guidelines:

Reformatting /workspace/py/trtorch/_compile_spec.py
Reformatting /workspace/py/trtorch/_types.py
Reformatting /workspace/py/trtorch/_compiler.py
Reformatting /workspace/py/trtorch/logging.py
Reformatting /workspace/py/trtorch/__init__.py
Reformatting /workspace/py/setup.py
Reformatting /workspace/docsrc/conf.py
Reformatting /workspace/tests/modules/hub.py
--- /workspace/tests/py/test_multi_gpu.py	(original)
+++ /workspace/tests/py/test_multi_gpu.py	(reformatted)
@@ -5,7 +5,9 @@

from model_test_case import ModelTestCase

+
class TestMultiGpuSwitching(ModelTestCase):
+
    def setUp(self):
        if torch.cuda.device_count() < 2:
            self.fail("Test is not relevant for this platform since number of available CUDA devices is less than 2")
@@ -55,11 +57,13 @@
        trtorch.set_device(0)
        self.assertTrue(same < 2e-3)

+
def test_suite():
    suite = unittest.TestSuite()
    suite.addTest(TestMultiGpuSwitching.parametrize(TestMultiGpuSwitching, model=models.resnet18(pretrained=True)))

    return suite
+

suite = test_suite()

Reformatting /workspace/tests/py/model_test_case.py
Reformatting /workspace/tests/py/test_api_dla.py
Reformatting /workspace/tests/py/test_api.py
Reformatting /workspace/tests/py/test_multi_gpu.py
Reformatting /workspace/tests/py/test_to_backend_api.py
ERROR: Some files do not conform to style guidelines

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to Python style guidelines