2022-07-13 08:18:45 -04:00
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import lldb
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2022-07-13 13:14:44 -04:00
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from lldb_rb.constants import *
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from lldb_rb.rb_base_command import RbBaseCommand
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2022-07-13 08:18:45 -04:00
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class HeapPageCommand(RbBaseCommand):
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program = "heap_page"
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help_string = "prints out 'struct heap_page' for a VALUE pointer in the page"
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def call(self, debugger, command, exe_ctx, result):
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self.t_heap_page_body = self.target.FindFirstType("struct heap_page_body")
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self.t_heap_page_ptr = self.target.FindFirstType("struct heap_page").GetPointerType()
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page = self._get_page(self.frame.EvaluateExpression(command))
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page.Cast(self.t_heap_page_ptr)
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self._append_command_output(debugger, "p (struct heap_page *) %0#x" % page.GetValueAsUnsigned(), result)
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self._append_command_output(debugger, "p *(struct heap_page *) %0#x" % page.GetValueAsUnsigned(), result)
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def _get_page(self, val):
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addr = val.GetValueAsUnsigned()
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page_addr = addr & ~(HEAP_PAGE_ALIGN_MASK)
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address = lldb.SBAddress(page_addr, self.target)
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body = self.target.CreateValueFromAddress("page", address, self.t_heap_page_body)
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return body.GetValueForExpressionPath("->header.page")
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