danilashtefan updated this revision to Diff 385744.
danilashtefan marked 10 inline comments as done.
danilashtefan added a comment.
All the requested changes are done :)
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D113362/new/
https://reviews.llvm.org/D113362
Files:
lldb/examples/synthetic/gnu_libstdcpp.py
lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/Makefile
lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/TestDataFormatterStdForwardList.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/main.cpp
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/main.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/main.cpp
@@ -0,0 +1,7 @@
+#include <forward_list>
+
+int main() {
+ std::forward_list<int> empty{}, one_elt{47},
+ five_elts{1, 22, 333, 4444, 55555};
+ return 0; // break here
+}
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/TestDataFormatterStdForwardList.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/TestDataFormatterStdForwardList.py
@@ -0,0 +1,51 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestDataFormatterLibcxxForwardList(TestBase):
+
+ mydir = TestBase.compute_mydir(__file__)
+
+ def setUp(self):
+ TestBase.setUp(self)
+ self.line = line_number('main.cpp', '// break here')
+ self.namespace = 'std'
+
+ @add_test_categories(["libstdcxx"])
+ def test(self):
+ """Test that std::forward_list is displayed correctly"""
+ self.build()
+ lldbutil.run_to_source_breakpoint(self, '// break here',
+ lldb.SBFileSpec("main.cpp", False))
+
+ forward_list = self.namespace + '::forward_list'
+ self.expect("frame variable empty",
+ substrs=[forward_list,
+ 'size=0',
+ '{}'])
+
+ self.expect("frame variable one_elt",
+ substrs=[forward_list,
+ 'size=1',
+ '{',
+ '[0] = 47',
+ '}'])
+
+ self.expect("frame variable five_elts",
+ substrs=[forward_list,
+ 'size=5',
+ '{',
+ '[0] = 1',
+ '[1] = 22',
+ '[2] = 333',
+ '[3] = 4444',
+ '[4] = 55555',
+ '}'])
Index: lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/forward_list/Makefile
@@ -0,0 +1,4 @@
+CXX_SOURCES := main.cpp
+
+USE_LIBSTDCPP := 1
+include Makefile.rules
Index: lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
===================================================================
--- lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
+++ lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
@@ -923,6 +923,11 @@
SyntheticChildrenSP(new ScriptedSyntheticChildren(
stl_synth_flags,
"lldb.formatters.cpp.gnu_libstdcpp.StdListSynthProvider")));
+ cpp_category_sp->GetRegexTypeSyntheticsContainer()->Add(
+ RegularExpression("^std::(__cxx11::)?forward_list<.+>(( )?&)?$"),
+ SyntheticChildrenSP(new ScriptedSyntheticChildren(
+ stl_synth_flags,
+ "lldb.formatters.cpp.gnu_libstdcpp.StdForwardListSynthProvider")));
stl_summary_flags.SetDontShowChildren(false);
stl_summary_flags.SetSkipPointers(false);
cpp_category_sp->GetRegexTypeSummariesContainer()->Add(
@@ -953,6 +958,10 @@
RegularExpression("^std::(__cxx11::)?list<.+>(( )?&)?$"),
TypeSummaryImplSP(
new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
+ cpp_category_sp->GetRegexTypeSummariesContainer()->Add(
+ RegularExpression("^std::(__cxx11::)?forward_list<.+>(( )?&)?$"),
+ TypeSummaryImplSP(
+ new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
AddCXXSynthetic(
cpp_category_sp,
Index: lldb/examples/synthetic/gnu_libstdcpp.py
===================================================================
--- lldb/examples/synthetic/gnu_libstdcpp.py
+++ lldb/examples/synthetic/gnu_libstdcpp.py
@@ -9,12 +9,17 @@
# before relying on these formatters to do the right thing for your setup
-class StdListSynthProvider:
-
- def __init__(self, valobj, dict):
+class AbstractListSynthProvider:
+ def __init__(self, valobj, dict, has_prev):
+ '''
+ :param valobj: The value object of the list
+ :param dict: A dict with metadata provided by LLDB
+ :param has_prev: Whether the list supports a 'prev' pointer besides a 'next' one
+ '''
logger = lldb.formatters.Logger.Logger()
self.valobj = valobj
self.count = None
+ self.has_prev = has_prev
logger >> "Providing synthetic children for a list named " + \
str(valobj.GetName())
@@ -24,13 +29,13 @@
def is_valid(self, node):
logger = lldb.formatters.Logger.Logger()
- valid = self.value(self.next_node(node)) != self.node_address
+ valid = self.value(self.next_node(node)) != self.get_end_of_list_address()
if valid:
logger >> "%s is valid" % str(self.valobj.GetName())
else:
logger >> "synthetic value is not valid"
return valid
-
+
def value(self, node):
logger = lldb.formatters.Logger.Logger()
value = node.GetValueAsUnsigned()
@@ -73,26 +78,30 @@
def num_children_impl(self):
logger = lldb.formatters.Logger.Logger()
try:
- next_val = self.next.GetValueAsUnsigned(0)
- prev_val = self.prev.GetValueAsUnsigned(0)
# After a std::list has been initialized, both next and prev will
# be non-NULL
- if next_val == 0 or prev_val == 0:
- return 0
- if next_val == self.node_address:
+ next_val = self.next.GetValueAsUnsigned(0)
+ if next_val == 0:
return 0
- if next_val == prev_val:
- return 1
if self.has_loop():
return 0
- size = 2
+ if self.has_prev:
+ prev_val = self.prev.GetValueAsUnsigned(0)
+ if prev_val == 0:
+ return 0
+ if next_val == self.node_address:
+ return 0
+ if next_val == prev_val:
+ return 1
+ size = 2 if self.has_prev else 1
current = self.next
while current.GetChildMemberWithName(
- '_M_next').GetValueAsUnsigned(0) != self.node_address:
+ '_M_next').GetValueAsUnsigned(0) != self.get_end_of_list_address():
size = size + 1
current = current.GetChildMemberWithName('_M_next')
- return (size - 1)
+ return (size - 1) if self.has_prev else size
except:
+ logger >> "Error determining the size"
return 0
def get_child_index(self, name):
@@ -101,7 +110,7 @@
return int(name.lstrip('[').rstrip(']'))
except:
return -1
-
+
def get_child_at_index(self, index):
logger = lldb.formatters.Logger.Logger()
logger >> "Fetching child " + str(index)
@@ -115,9 +124,11 @@
while offset > 0:
current = current.GetChildMemberWithName('_M_next')
offset = offset - 1
+ # C++ lists store the data of a node after its pointers. In the case of a forward list, there's just one pointer (next), and
+ # in the case of a double-linked list, there's an additional pointer (prev).
return current.CreateChildAtOffset(
'[' + str(index) + ']',
- 2 * current.GetType().GetByteSize(),
+ (2 if self.has_prev else 1) * current.GetType().GetByteSize(),
self.data_type)
except:
return None
@@ -139,19 +150,60 @@
# later
self.count = None
try:
- impl = self.valobj.GetChildMemberWithName('_M_impl')
- self.node = impl.GetChildMemberWithName('_M_node')
- self.node_address = self.valobj.AddressOf().GetValueAsUnsigned(0)
- self.next = self.node.GetChildMemberWithName('_M_next')
- self.prev = self.node.GetChildMemberWithName('_M_prev')
+ self.impl = self.valobj.GetChildMemberWithName('_M_impl')
self.data_type = self.extract_type()
self.data_size = self.data_type.GetByteSize()
+ self.updateNodes()
except:
pass
return False
+ '''
+ Method is used to extract the list pointers into the variables (e.g self.node, self.next, and optionally to self.prev)
+ and is mandatory to be overriden in each AbstractListSynthProvider subclass
+ '''
+ def updateNodes(self):
+ raise NotImplementedError
+
def has_children(self):
return True
+
+ '''
+ Method is used to identify if a node traversal has reached its end
+ and is mandatory to be overriden in each AbstractListSynthProvider subclass
+ '''
+ def get_end_of_list_address(self):
+ raise NotImplementedError
+
+
+class StdForwardListSynthProvider(AbstractListSynthProvider):
+
+ def __init__(self, valobj, dict):
+ has_prev = False
+ super().__init__(valobj, dict, has_prev)
+
+ def updateNodes(self):
+ self.node = self.impl.GetChildMemberWithName('_M_head')
+ self.next = self.node.GetChildMemberWithName('_M_next')
+
+ def get_end_of_list_address(self):
+ return 0
+
+
+class StdListSynthProvider(AbstractListSynthProvider):
+
+ def __init__(self, valobj, dict):
+ has_prev = True
+ super().__init__(valobj, dict, has_prev)
+
+ def updateNodes(self):
+ self.node_address = self.valobj.AddressOf().GetValueAsUnsigned(0)
+ self.node = self.impl.GetChildMemberWithName('_M_node')
+ self.prev = self.node.GetChildMemberWithName('_M_prev')
+ self.next = self.node.GetChildMemberWithName('_M_next')
+
+ def get_end_of_list_address(self):
+ return self.node_address
class StdVectorSynthProvider:
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