A simple implementation of a summary and synthetic children providers for LLDB-specific shared pointers - This could be generalized to work with C++11 shared pointers with relative ease

llvm-svn: 156410

1 files changed, 61 insertions, 0 deletions

diff --git a/lldb/examples/summaries/sp_cp.py b/lldb/examples/summaries/sp_cp.py
new file mode 100644
index 00000000000..9aa0a2f4fb9
--- /dev/null
+++ b/lldb/examples/summaries/sp_cp.py
@@ -0,0 +1,61 @@
+"""
+Summary and synthetic providers for LLDB-specific shared pointers
+
+part of The LLVM Compiler Infrastructure
+This file is distributed under the University of Illinois Open Source
+License. See LICENSE.TXT for details.
+"""
+
+class SharedPtr_SyntheticChildrenProvider:
+	def __init__(self,valobj,dict):
+		self.valobj = valobj
+		self.update()
+	def update(self):
+		pass
+	def num_children(self): 
+		return 1
+	def get_child_index(self,name): 
+		if name == "ptr":
+			return 0
+		if name == "count":
+			return 1
+		return None
+	def get_child_at_index(self,index): 
+		if index == 0:
+			return self.valobj.GetChildMemberWithName('_M_ptr')
+		if index == 1:
+			return self.valobj.GetChildMemberWithName('_M_refcount').GetChildMemberWithName('_M_pi').GetChildMemberWithName('_M_use_count')
+		return None
+
+def SharedPtr_SummaryProvider (valobj,dict):
+	return 'use = ' + str(valobj.GetChildMemberWithName("count").GetValueAsUnsigned())
+
+class ValueObjectSP_SyntheticChildrenProvider:
+	def __init__(self,valobj,dict):
+		self.valobj = valobj
+		self.update()
+	def update(self):
+		pass
+	def num_children(self): 
+		return 1
+	def get_child_index(self,name): 
+		if name == "ptr":
+			return 0
+		if name == "count":
+			return 1
+		return None
+	def get_child_at_index(self,index): 
+		if index == 0:
+			return self.valobj.GetChildMemberWithName('ptr_')
+		if index == 1:
+			return self.valobj.GetChildMemberWithName('cntrl_').GetChildMemberWithName('shared_owners_')
+		return None
+
+def ValueObjectSP_SummaryProvider (valobj,dict):
+	return 'use = ' + str(1 + valobj.GetChildMemberWithName("count").GetValueAsUnsigned())
+
+def __lldb_init_module(debugger, dict):
+	debugger.HandleCommand('type summary add -x ".*ValueObjectSP" --expand -F sp_cp.ValueObjectSP_SummaryProvider')
+	debugger.HandleCommand('type synthetic add -x ".*ValueObjectSP" -l sp_cp.ValueObjectSP_SyntheticChildrenProvider')
+	debugger.HandleCommand('type summary add -x ".*SP" --expand -F sp_cp.SharedPtr_SummaryProvider')
+	debugger.HandleCommand('type synthetic add -x ".*SP" -l sp_cp.SharedPtr_SyntheticChildrenProvider')