kubamracek created this revision.
kubamracek added reviewers: jingham, jasonmolenda, davide.
An Obj-C array type _NSCallStackArray is used in NSException backtraces. This
patch adds a synthetic frontend for _NSCallStackArray, which now correctly
returns frame PCs.
https://reviews.llvm.org/D44081
Files:
packages/Python/lldbsuite/test/lang/objc/exceptions/TestObjCExceptions.py
source/Plugins/Language/ObjC/NSArray.cpp
source/Plugins/Language/ObjC/ObjCLanguage.cpp
Index: source/Plugins/Language/ObjC/ObjCLanguage.cpp
===================================================================
--- source/Plugins/Language/ObjC/ObjCLanguage.cpp
+++ source/Plugins/Language/ObjC/ObjCLanguage.cpp
@@ -412,6 +412,9 @@
AddCXXSummary(
objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
"NSArray summary provider", ConstString("__NSCFArray"), appkit_flags);
+ AddCXXSummary(
+ objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
+ "NSArray summary provider", ConstString("_NSCallStackArray"), appkit_flags);
AddCXXSummary(
objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
"NSArray summary provider", ConstString("CFArrayRef"), appkit_flags);
@@ -531,6 +534,10 @@
lldb_private::formatters::NSArraySyntheticFrontEndCreator,
"NSArray synthetic children", ConstString("__NSCFArray"),
ScriptedSyntheticChildren::Flags());
+ AddCXXSynthetic(objc_category_sp,
+ lldb_private::formatters::NSArraySyntheticFrontEndCreator,
+ "NSArray synthetic children", ConstString("_NSCallStackArray"),
+ ScriptedSyntheticChildren::Flags());
AddCXXSynthetic(objc_category_sp,
lldb_private::formatters::NSArraySyntheticFrontEndCreator,
"NSArray synthetic children",
Index: source/Plugins/Language/ObjC/NSArray.cpp
===================================================================
--- source/Plugins/Language/ObjC/NSArray.cpp
+++ source/Plugins/Language/ObjC/NSArray.cpp
@@ -218,6 +218,25 @@
}
+namespace CallStackArray {
+struct DataDescriptor_32 {
+ uint32_t _data;
+ uint32_t _used;
+ uint32_t _offset;
+ const uint32_t _size = 0;
+};
+
+struct DataDescriptor_64 {
+ uint64_t _data;
+ uint64_t _used;
+ uint64_t _offset;
+ const uint64_t _size = 0;
+};
+
+using NSCallStackArraySyntheticFrontEnd =
+ GenericNSArrayMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
+} // namespace CallStackArray
+
template <typename D32, typename D64, bool Inline>
class GenericNSArrayISyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
@@ -368,6 +387,7 @@
static const ConstString g_NSArrayCF("__NSCFArray");
static const ConstString g_NSArrayMLegacy("__NSArrayM_Legacy");
static const ConstString g_NSArrayMImmutable("__NSArrayM_Immutable");
+ static const ConstString g_NSCallStackArray("_NSCallStackArray");
if (class_name.IsEmpty())
return false;
@@ -423,6 +443,12 @@
valobj_addr + 2 * ptr_size, ptr_size, 0, error);
if (error.Fail())
return false;
+ } else if (class_name == g_NSCallStackArray) {
+ Status error;
+ value = process_sp->ReadUnsignedIntegerFromMemory(
+ valobj_addr + 2 * ptr_size, ptr_size, 0, error);
+ if (error.Fail())
+ return false;
} else {
auto &map(NSArray_Additionals::GetAdditionalSummaries());
auto iter = map.find(class_name), end = map.end();
@@ -817,6 +843,7 @@
static const ConstString g_NSArray1("__NSSingleObjectArrayI");
static const ConstString g_NSArrayMLegacy("__NSArrayM_Legacy");
static const ConstString g_NSArrayMImmutable("__NSArrayM_Immutable");
+ static const ConstString g_NSCallStackArray("_NSCallStackArray");
if (class_name.IsEmpty())
return nullptr;
@@ -846,6 +873,8 @@
return (new Foundation1010::NSArrayMSyntheticFrontEnd(valobj_sp));
else
return (new Foundation109::NSArrayMSyntheticFrontEnd(valobj_sp));
+ } else if (class_name == g_NSCallStackArray) {
+ return (new CallStackArray::NSCallStackArraySyntheticFrontEnd(valobj_sp));
} else {
auto &map(NSArray_Additionals::GetAdditionalSynthetics());
auto iter = map.find(class_name), end = map.end();
Index: packages/Python/lldbsuite/test/lang/objc/exceptions/TestObjCExceptions.py
===================================================================
--- packages/Python/lldbsuite/test/lang/objc/exceptions/TestObjCExceptions.py
+++ packages/Python/lldbsuite/test/lang/objc/exceptions/TestObjCExceptions.py
@@ -28,7 +28,8 @@
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs=['stopped', 'stop reason = breakpoint'])
- thread = self.dbg.GetSelectedTarget().GetProcess().GetSelectedThread()
+ target = self.dbg.GetSelectedTarget()
+ thread = target.GetProcess().GetSelectedThread()
frame = thread.GetSelectedFrame()
self.expect(
@@ -87,4 +88,14 @@
self.assertEqual(userInfo.summary, "1 key/value pair")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(0).description, "some_key")
self.assertEqual(userInfo.GetChildAtIndex(0).GetChildAtIndex(1).description, "some_value")
- self.assertGreater(e2.GetChildMemberWithName("reserved").dynamic.num_children, 0)
+ reserved = e2.GetChildMemberWithName("reserved").dynamic
+ self.assertGreater(reserved.num_children, 0)
+ callStackReturnAddresses = [reserved.GetChildAtIndex(i).GetChildAtIndex(1) for i in range(0, reserved.GetNumChildren())
+ if reserved.GetChildAtIndex(i).GetChildAtIndex(0).description == "callStackReturnAddresses"][0].dynamic
+ self.assertEqual(callStackReturnAddresses.summary, '@"5 elements"')
+ children = [callStackReturnAddresses.GetChildAtIndex(i) for i in range(0, callStackReturnAddresses.num_children)]
+
+ pcs = [i.unsigned for i in children]
+ names = [target.ResolveSymbolContextForAddress(lldb.SBAddress(pc, target), lldb.eSymbolContextSymbol).GetSymbol().name for pc in pcs]
+ for n in ["objc_exception_throw", "foo", "main"]:
+ self.assertTrue(n in names, "%s is in the exception backtrace (%s)" % (n, names))
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