lldb: debug info test, lldb plugin, readme
This commit is contained in:
Li Jie
137
_lldb/test.py
137
_lldb/test.py
@@ -7,6 +7,7 @@ import signal
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from dataclasses import dataclass, field
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from typing import List
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import lldb
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import llgo_plugin # Add this import
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class LLDBTestException(Exception):
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@@ -81,6 +82,11 @@ class LLDBDebugger:
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raise LLDBTestException(f"Failed to create target for {
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self.executable_path}")
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self.debugger.HandleCommand(
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'command script add -f llgo_plugin.print_go_expression p')
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self.debugger.HandleCommand(
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'command script add -f llgo_plugin.print_all_variables v')
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def set_breakpoint(self, file_spec, line_number):
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bp = self.target.BreakpointCreateByLocation(
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file_spec, line_number)
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@@ -97,121 +103,30 @@ class LLDBDebugger:
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if self.process.GetState() != lldb.eStateStopped:
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raise LLDBTestException("Process didn't stop at breakpoint")
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def get_variable_value(self, var_name):
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def get_variable_value(self, var_expression):
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frame = self.process.GetSelectedThread().GetFrameAtIndex(0)
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if isinstance(var_name, lldb.SBValue):
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var = var_name
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else:
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# process struct field access
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parts = var_name.split('.')
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if len(parts) > 1:
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var = frame.FindVariable(parts[0])
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for part in parts[1:]:
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if var.IsValid():
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var = var.GetChildMemberWithName(part)
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else:
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return None
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# 处理结构体成员访问、指针解引用和数组索引
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parts = var_expression.split('.')
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var = frame.FindVariable(parts[0])
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for part in parts[1:]:
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if not var.IsValid():
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return None
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# 处理数组索引
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if '[' in part and ']' in part:
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array_name, index = part.split('[')
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index = int(index.rstrip(']'))
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var = var.GetChildAtIndex(index)
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# 处理指针解引用
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elif var.GetType().IsPointerType():
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var = var.Dereference()
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var = var.GetChildMemberWithName(part)
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else:
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actual_var_name = var_name.split('=')[0].strip()
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if '(' in actual_var_name:
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actual_var_name = actual_var_name.split('(')[-1].strip()
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var = frame.FindVariable(actual_var_name)
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var = var.GetChildMemberWithName(part)
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return self.format_value(var) if var.IsValid() else None
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def format_value(self, var, include_type=True):
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if var.IsValid():
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type_name = var.GetTypeName()
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var_type = var.GetType()
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type_class = var_type.GetTypeClass()
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if type_name.startswith('[]'): # Slice
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return self.format_slice(var)
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elif var_type.IsArrayType():
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return self.format_array(var)
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elif type_name == 'string': # String
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return self.format_string(var)
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elif type_class in [lldb.eTypeClassStruct, lldb.eTypeClassClass]:
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return self.format_struct(var, include_type)
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else:
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value = var.GetValue()
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summary = var.GetSummary()
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if value is not None:
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return str(value)
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elif summary is not None:
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return summary
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else:
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return "None"
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return "None"
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def format_slice(self, var):
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length = int(var.GetChildMemberWithName('len').GetValue())
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data_ptr = var.GetChildMemberWithName('data')
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elements = []
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# Get the actual pointer value
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ptr_value = int(data_ptr.GetValue(), 16)
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element_type = data_ptr.GetType().GetPointeeType()
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element_size = element_type.GetByteSize()
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for i in range(length):
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element_address = ptr_value + i * element_size
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element = self.target.CreateValueFromAddress(
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f"element_{i}", lldb.SBAddress(element_address, self.target), element_type)
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value = self.format_value(element, include_type=False)
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elements.append(value)
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type_name = var.GetType().GetName().split(
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'[]')[-1] # Extract element type from slice type
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type_name = self.type_mapping.get(type_name, type_name) # Use mapping
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result = f"[]{type_name}{{{', '.join(elements)}}}"
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return result
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def format_array(self, var):
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elements = []
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for i in range(var.GetNumChildren()):
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value = self.format_value(
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var.GetChildAtIndex(i), include_type=False)
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elements.append(value)
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array_size = var.GetNumChildren()
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type_name = var.GetType().GetArrayElementType().GetName()
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type_name = self.type_mapping.get(type_name, type_name) # Use mapping
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return f"[{array_size}]{type_name}{{{', '.join(elements)}}}"
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def format_pointer(self, var):
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target = var.Dereference()
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if target.IsValid():
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return f"*{self.get_variable_value(target.GetName())}"
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else:
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return str(var.GetValue())
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def format_string(self, var):
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summary = var.GetSummary()
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if summary is not None:
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return summary.strip('"')
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else:
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data = var.GetChildMemberWithName('data').GetValue()
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length = int(var.GetChildMemberWithName('len').GetValue())
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if data and length:
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error = lldb.SBError()
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return self.process.ReadCStringFromMemory(int(data, 16), length + 1, error)
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return "None"
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def format_struct(self, var, include_type=True):
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children = []
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for i in range(var.GetNumChildren()):
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child = var.GetChildAtIndex(i)
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child_name = child.GetName()
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child_value = self.format_value(child)
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children.append(f"{child_name} = {child_value}")
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struct_content = f"{{{', '.join(children)}}}"
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if include_type:
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struct_name = var.GetTypeName()
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return f"{struct_name}{struct_content}"
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else:
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return struct_content
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return llgo_plugin.format_value(var, self.debugger) if var.IsValid() else None
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def get_all_variable_names(self):
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frame = self.process.GetSelectedThread().GetFrameAtIndex(0)
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