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91 lines
3.2 KiB
91 lines
3.2 KiB
@cython.final
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@cython.internal
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cdef class _MemDebug:
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"""Debugging support for the memory allocation in libxml2.
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"""
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def bytes_used(self):
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"""bytes_used(self)
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Returns the total amount of memory (in bytes) currently used by libxml2.
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Note that libxml2 constrains this value to a C int, which limits
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the accuracy on 64 bit systems.
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"""
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return tree.xmlMemUsed()
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def blocks_used(self):
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"""blocks_used(self)
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Returns the total number of memory blocks currently allocated by libxml2.
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Note that libxml2 constrains this value to a C int, which limits
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the accuracy on 64 bit systems.
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"""
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return tree.xmlMemBlocks()
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def dict_size(self):
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"""dict_size(self)
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Returns the current size of the global name dictionary used by libxml2
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for the current thread. Each thread has its own dictionary.
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"""
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c_dict = __GLOBAL_PARSER_CONTEXT._getThreadDict(NULL)
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if c_dict is NULL:
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raise MemoryError()
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return tree.xmlDictSize(c_dict)
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def dump(self, output_file=None, byte_count=None):
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"""dump(self, output_file=None, byte_count=None)
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Dumps the current memory blocks allocated by libxml2 to a file.
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The optional parameter 'output_file' specifies the file path. It defaults
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to the file ".memorylist" in the current directory.
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The optional parameter 'byte_count' limits the number of bytes in the dump.
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Note that this parameter is ignored when lxml is compiled against a libxml2
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version before 2.7.0.
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"""
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cdef Py_ssize_t c_count
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if output_file is None:
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output_file = b'.memorylist'
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elif isinstance(output_file, unicode):
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output_file.encode(sys.getfilesystemencoding())
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f = stdio.fopen(output_file, "w")
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if f is NULL:
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raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}")
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try:
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if byte_count is None:
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tree.xmlMemDisplay(f)
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else:
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c_count = byte_count
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tree.xmlMemDisplayLast(f, c_count)
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finally:
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stdio.fclose(f)
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def show(self, output_file=None, block_count=None):
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"""show(self, output_file=None, block_count=None)
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Dumps the current memory blocks allocated by libxml2 to a file.
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The output file format is suitable for line diffing.
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The optional parameter 'output_file' specifies the file path. It defaults
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to the file ".memorydump" in the current directory.
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The optional parameter 'block_count' limits the number of blocks
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in the dump.
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"""
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if output_file is None:
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output_file = b'.memorydump'
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elif isinstance(output_file, unicode):
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output_file.encode(sys.getfilesystemencoding())
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f = stdio.fopen(output_file, "w")
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if f is NULL:
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raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}")
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try:
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tree.xmlMemShow(f, block_count if block_count is not None else tree.xmlMemBlocks())
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finally:
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stdio.fclose(f)
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memory_debugger = _MemDebug()
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