7fbd427f5e
Add the ability to get a C++ vtable ValueObject from another
ValueObject.
This patch adds the ability to ask a ValueObject for a ValueObject that
represents the virtual function table for a C++ class. If the
ValueObject is not a C++ class with a vtable, a valid ValueObject value
will be returned that contains an appropriate error. If it is successful
a valid ValueObject that represents vtable will be returned. The
ValueObject that is returned will have a name that matches the demangled
value for a C++ vtable mangled name like "vtable for <class-name>". It
will have N children, one for each virtual function pointer. Each
child's value is the function pointer itself, the summary is the
symbolication of this function pointer, and the type will be a valid
function pointer from the debug info if there is debug information
corresponding to the virtual function pointer.
The vtable SBValue will have the following:
- SBValue::GetName() returns "vtable for <class>"
- SBValue::GetValue() returns a string representation of the vtable
address
- SBValue::GetSummary() returns NULL
- SBValue::GetType() returns a type appropriate for a uintptr_t type for
the current process
- SBValue::GetLoadAddress() returns the address of the vtable adderess
- SBValue::GetValueAsUnsigned(...) returns the vtable address
- SBValue::GetNumChildren() returns the number of virtual function
pointers in the vtable
- SBValue::GetChildAtIndex(...) returns a SBValue that represents a
virtual function pointer
The child SBValue objects that represent a virtual function pointer has
the following values:
- SBValue::GetName() returns "[%u]" where %u is the vtable function
pointer index
- SBValue::GetValue() returns a string representation of the virtual
function pointer
- SBValue::GetSummary() returns a symbolicated respresentation of the
virtual function pointer
- SBValue::GetType() returns the function prototype type if there is
debug info, or a generic funtion prototype if there is no debug info
- SBValue::GetLoadAddress() returns the address of the virtual function
pointer
- SBValue::GetValueAsUnsigned(...) returns the virtual function pointer
- SBValue::GetNumChildren() returns 0
- SBValue::GetChildAtIndex(...) returns invalid SBValue for any index
Examples of using this API via python:
```
(lldb) script vtable = lldb.frame.FindVariable("shape_ptr").GetVTable()
(lldb) script vtable
vtable for Shape = 0x0000000100004088 {
[0] = 0x0000000100003d20 a.out`Shape::~Shape() at main.cpp:3
[1] = 0x0000000100003e4c a.out`Shape::~Shape() at main.cpp:3
[2] = 0x0000000100003e7c a.out`Shape::area() at main.cpp:4
[3] = 0x0000000100003e3c a.out`Shape::optional() at main.cpp:7
}
(lldb) script c = vtable.GetChildAtIndex(0)
(lldb) script c
(void ()) [0] = 0x0000000100003d20 a.out`Shape::~Shape() at main.cpp:3
```
112 lines
2.4 KiB
CMake
112 lines
2.4 KiB
CMake
lldb_tablegen(CoreProperties.inc -gen-lldb-property-defs
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SOURCE CoreProperties.td
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TARGET LLDBCorePropertiesGen)
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lldb_tablegen(CorePropertiesEnum.inc -gen-lldb-property-enum-defs
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SOURCE CoreProperties.td
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TARGET LLDBCorePropertiesEnumGen)
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set(LLDB_CURSES_LIBS)
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set(LLDB_LIBEDIT_LIBS)
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if (LLDB_ENABLE_CURSES)
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list(APPEND LLDB_CURSES_LIBS ${PANEL_LIBRARIES} ${CURSES_LIBRARIES})
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if(LLVM_ENABLE_TERMINFO)
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list(APPEND LLDB_CURSES_LIBS ${Terminfo_LIBRARIES})
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endif()
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if (LLVM_BUILD_STATIC)
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list(APPEND LLDB_CURSES_LIBS gpm)
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endif()
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endif()
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# TODO: Add property `NO_PLUGIN_DEPENDENCIES` to lldbCore
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add_lldb_library(lldbCore
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Address.cpp
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AddressRange.cpp
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AddressResolver.cpp
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AddressResolverFileLine.cpp
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Communication.cpp
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DataFileCache.cpp
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Debugger.cpp
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DebuggerEvents.cpp
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Declaration.cpp
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Disassembler.cpp
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DumpDataExtractor.cpp
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DumpRegisterValue.cpp
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DumpRegisterInfo.cpp
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DynamicLoader.cpp
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EmulateInstruction.cpp
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FileLineResolver.cpp
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FormatEntity.cpp
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Highlighter.cpp
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IOHandler.cpp
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IOHandlerCursesGUI.cpp
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Mangled.cpp
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Module.cpp
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ModuleChild.cpp
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ModuleList.cpp
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Opcode.cpp
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PluginManager.cpp
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Progress.cpp
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RichManglingContext.cpp
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SearchFilter.cpp
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Section.cpp
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SourceLocationSpec.cpp
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SourceManager.cpp
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StreamAsynchronousIO.cpp
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ThreadedCommunication.cpp
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UserSettingsController.cpp
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Value.cpp
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ValueObject.cpp
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ValueObjectCast.cpp
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ValueObjectChild.cpp
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ValueObjectConstResult.cpp
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ValueObjectConstResultCast.cpp
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ValueObjectConstResultChild.cpp
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ValueObjectConstResultImpl.cpp
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ValueObjectDynamicValue.cpp
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ValueObjectList.cpp
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ValueObjectMemory.cpp
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ValueObjectRegister.cpp
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ValueObjectSyntheticFilter.cpp
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ValueObjectUpdater.cpp
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ValueObjectVariable.cpp
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ValueObjectVTable.cpp
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DEPENDS
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clang-tablegen-targets
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LINK_LIBS
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lldbBreakpoint
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lldbDataFormatters
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lldbExpression
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lldbHost
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lldbInterpreter
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lldbSymbol
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lldbTarget
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lldbUtility
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lldbPluginCPlusPlusLanguage
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lldbPluginObjCLanguage
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${LLDB_CURSES_LIBS}
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CLANG_LIBS
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clangDriver
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LINK_COMPONENTS
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Support
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Demangle
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TargetParser
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)
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add_dependencies(lldbCore
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LLDBCorePropertiesGen
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LLDBCorePropertiesEnumGen)
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# Needed to properly resolve references in a debug build.
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# TODO: Remove once we have better layering
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set_target_properties(lldbCore PROPERTIES LINK_INTERFACE_MULTIPLICITY 5)
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if (LLDB_ENABLE_CURSES)
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target_include_directories(lldbCore PRIVATE ${CURSES_INCLUDE_DIRS})
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endif()
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