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llvm-project/lldb/scripts/interface/SBValue.i

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//===-- SWIG Interface for SBValue ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
namespace lldb {
%feature("docstring",
"Represents the value of a variable, a register, or an expression.
SBValue supports iteration through its child, which in turn is represented
as an SBValue. For example, we can get the general purpose registers of a
frame as an SBValue, and iterate through all the registers,
registerSet = frame.GetRegisters() # Returns an SBValueList.
for regs in registerSet:
if 'general purpose registers' in regs.getName().lower():
GPRs = regs
break
print('%s (number of children = %d):' % (GPRs.GetName(), GPRs.GetNumChildren()))
for reg in GPRs:
print('Name: ', reg.GetName(), ' Value: ', reg.GetValue())
produces the output:
General Purpose Registers (number of children = 21):
Name: rax Value: 0x0000000100000c5c
Name: rbx Value: 0x0000000000000000
Name: rcx Value: 0x00007fff5fbffec0
Name: rdx Value: 0x00007fff5fbffeb8
Name: rdi Value: 0x0000000000000001
Name: rsi Value: 0x00007fff5fbffea8
Name: rbp Value: 0x00007fff5fbffe80
Name: rsp Value: 0x00007fff5fbffe60
Name: r8 Value: 0x0000000008668682
Name: r9 Value: 0x0000000000000000
Name: r10 Value: 0x0000000000001200
Name: r11 Value: 0x0000000000000206
Name: r12 Value: 0x0000000000000000
Name: r13 Value: 0x0000000000000000
Name: r14 Value: 0x0000000000000000
Name: r15 Value: 0x0000000000000000
Name: rip Value: 0x0000000100000dae
Name: rflags Value: 0x0000000000000206
Name: cs Value: 0x0000000000000027
Name: fs Value: 0x0000000000000010
Name: gs Value: 0x0000000000000048
See also linked_list_iter() for another perspective on how to iterate through an
SBValue instance which interprets the value object as representing the head of a
linked list."
) SBValue;
class SBValue
{
public:
SBValue ();
SBValue (const SBValue &rhs);
~SBValue ();
bool
IsValid();
void
Clear();
SBError
GetError();
lldb::user_id_t
GetID ();
const char *
GetName();
const char *
GetTypeName ();
const char *
GetDisplayTypeName ();
size_t
GetByteSize ();
bool
IsInScope ();
lldb::Format
GetFormat ();
void
SetFormat (lldb::Format format);
const char *
GetValue ();
int64_t
GetValueAsSigned(SBError& error, int64_t fail_value=0);
uint64_t
GetValueAsUnsigned(SBError& error, uint64_t fail_value=0);
int64_t
GetValueAsSigned(int64_t fail_value=0);
uint64_t
GetValueAsUnsigned(uint64_t fail_value=0);
ValueType
GetValueType ();
bool
GetValueDidChange ();
const char *
GetSummary ();
const char *
GetSummary (lldb::SBStream& stream,
lldb::SBTypeSummaryOptions& options);
const char *
GetObjectDescription ();
const char *
GetTypeValidatorResult ();
lldb::SBValue
GetDynamicValue (lldb::DynamicValueType use_dynamic);
lldb::SBValue
GetStaticValue ();
lldb::SBValue
GetNonSyntheticValue ();
lldb::DynamicValueType
GetPreferDynamicValue ();
void
SetPreferDynamicValue (lldb::DynamicValueType use_dynamic);
bool
GetPreferSyntheticValue ();
void
SetPreferSyntheticValue (bool use_synthetic);
bool
IsDynamic();
bool
IsSynthetic ();
bool
IsSyntheticChildrenGenerated ();
void
SetSyntheticChildrenGenerated (bool);
const char *
GetLocation ();
bool
SetValueFromCString (const char *value_str);
bool
SetValueFromCString (const char *value_str, lldb::SBError& error);
lldb::SBTypeFormat
GetTypeFormat ();
lldb::SBTypeSummary
GetTypeSummary ();
lldb::SBTypeFilter
GetTypeFilter ();
lldb::SBTypeSynthetic
GetTypeSynthetic ();
lldb::SBValue
GetChildAtIndex (uint32_t idx);
%feature("docstring", "
//------------------------------------------------------------------
/// Get a child value by index from a value.
///
/// Structs, unions, classes, arrays and pointers have child
/// values that can be access by index.
///
/// Structs and unions access child members using a zero based index
/// for each child member. For
///
/// Classes reserve the first indexes for base classes that have
/// members (empty base classes are omitted), and all members of the
/// current class will then follow the base classes.
///
/// Pointers differ depending on what they point to. If the pointer
/// points to a simple type, the child at index zero
/// is the only child value available, unless \a synthetic_allowed
/// is \b true, in which case the pointer will be used as an array
/// and can create 'synthetic' child values using positive or
/// negative indexes. If the pointer points to an aggregate type
/// (an array, class, union, struct), then the pointee is
/// transparently skipped and any children are going to be the indexes
/// of the child values within the aggregate type. For example if
/// we have a 'Point' type and we have a SBValue that contains a
/// pointer to a 'Point' type, then the child at index zero will be
/// the 'x' member, and the child at index 1 will be the 'y' member
/// (the child at index zero won't be a 'Point' instance).
///
/// If you actually need an SBValue that represents the type pointed
/// to by a SBValue for which GetType().IsPointeeType() returns true,
/// regardless of the pointee type, you can do that with the SBValue.Dereference
/// method (or the equivalent deref property).
///
/// Arrays have a preset number of children that can be accessed by
/// index and will returns invalid child values for indexes that are
/// out of bounds unless the \a synthetic_allowed is \b true. In this
/// case the array can create 'synthetic' child values for indexes
/// that aren't in the array bounds using positive or negative
/// indexes.
///
/// @param[in] idx
/// The index of the child value to get
///
/// @param[in] use_dynamic
/// An enumeration that specifies whether to get dynamic values,
/// and also if the target can be run to figure out the dynamic
/// type of the child value.
///
/// @param[in] synthetic_allowed
/// If \b true, then allow child values to be created by index
/// for pointers and arrays for indexes that normally wouldn't
/// be allowed.
///
/// @return
/// A new SBValue object that represents the child member value.
//------------------------------------------------------------------
") GetChildAtIndex;
lldb::SBValue
GetChildAtIndex (uint32_t idx,
lldb::DynamicValueType use_dynamic,
bool can_create_synthetic);
lldb::SBValue
CreateChildAtOffset (const char *name, uint32_t offset, lldb::SBType type);
lldb::SBValue
SBValue::Cast (lldb::SBType type);
lldb::SBValue
CreateValueFromExpression (const char *name, const char* expression);
lldb::SBValue
CreateValueFromExpression (const char *name, const char* expression, SBExpressionOptions &options);
lldb::SBValue
CreateValueFromAddress(const char* name, lldb::addr_t address, lldb::SBType type);
lldb::SBValue
CreateValueFromData (const char* name,
lldb::SBData data,
lldb::SBType type);
lldb::SBType
GetType();
%feature("docstring", "
//------------------------------------------------------------------
/// Returns the child member index.
///
/// Matches children of this object only and will match base classes and
/// member names if this is a clang typed object.
///
/// @param[in] name
/// The name of the child value to get
///
/// @return
/// An index to the child member value.
//------------------------------------------------------------------
") GetIndexOfChildWithName;
uint32_t
GetIndexOfChildWithName (const char *name);
lldb::SBValue
GetChildMemberWithName (const char *name);
%feature("docstring", "
//------------------------------------------------------------------
/// Returns the child member value.
///
/// Matches child members of this object and child members of any base
/// classes.
///
/// @param[in] name
/// The name of the child value to get
///
/// @param[in] use_dynamic
/// An enumeration that specifies whether to get dynamic values,
/// and also if the target can be run to figure out the dynamic
/// type of the child value.
///
/// @return
/// A new SBValue object that represents the child member value.
//------------------------------------------------------------------
") GetChildMemberWithName;
lldb::SBValue
GetChildMemberWithName (const char *name, lldb::DynamicValueType use_dynamic);
%feature("docstring", "Expands nested expressions like .a->b[0].c[1]->d."
) GetValueForExpressionPath;
lldb::SBValue
GetValueForExpressionPath(const char* expr_path);
lldb::SBDeclaration
GetDeclaration ();
bool
MightHaveChildren ();
bool
IsRuntimeSupportValue ();
uint32_t
GetNumChildren ();
%feature("doctstring", "
//------------------------------------------------------------------
/// Returns the number for children.
///
/// @param[in] max
/// If max is less the lldb.UINT32_MAX, then the returned value is
/// capped to max.
///
/// @return
/// An integer value capped to the argument max.
//------------------------------------------------------------------
") GetNumChildren;
uint32_t
GetNumChildren (uint32_t max);
void *
GetOpaqueType();
lldb::SBValue
Dereference ();
lldb::SBValue
AddressOf();
bool
TypeIsPointerType ();
lldb::SBTarget
GetTarget();
lldb::SBProcess
GetProcess();
lldb::SBThread
GetThread();
lldb::SBFrame
GetFrame();
%feature("docstring", "
/// Find and watch a variable.
/// It returns an SBWatchpoint, which may be invalid.
") Watch;
lldb::SBWatchpoint
Watch (bool resolve_location, bool read, bool write, SBError &error);
%feature("docstring", "
/// Find and watch the location pointed to by a variable.
/// It returns an SBWatchpoint, which may be invalid.
") WatchPointee;
lldb::SBWatchpoint
WatchPointee (bool resolve_location, bool read, bool write, SBError &error);
bool
GetDescription (lldb::SBStream &description);
bool
GetExpressionPath (lldb::SBStream &description);
%feature("docstring", "
//------------------------------------------------------------------
/// Get an SBData wrapping what this SBValue points to.
///
/// This method will dereference the current SBValue, if its
/// data type is a T* or T[], and extract item_count elements
/// of type T from it, copying their contents in an SBData.
///
/// @param[in] item_idx
/// The index of the first item to retrieve. For an array
/// this is equivalent to array[item_idx], for a pointer
/// to *(pointer + item_idx). In either case, the measurement
/// unit for item_idx is the sizeof(T) rather than the byte
///
/// @param[in] item_count
/// How many items should be copied into the output. By default
/// only one item is copied, but more can be asked for.
///
/// @return
/// An SBData with the contents of the copied items, on success.
/// An empty SBData otherwise.
//------------------------------------------------------------------
") GetPointeeData;
lldb::SBData
GetPointeeData (uint32_t item_idx = 0,
uint32_t item_count = 1);
%feature("docstring", "
//------------------------------------------------------------------
/// Get an SBData wrapping the contents of this SBValue.
///
/// This method will read the contents of this object in memory
/// and copy them into an SBData for future use.
///
/// @return
/// An SBData with the contents of this SBValue, on success.
/// An empty SBData otherwise.
//------------------------------------------------------------------
") GetData;
lldb::SBData
GetData ();
bool
SetData (lldb::SBData &data, lldb::SBError& error);
lldb::addr_t
GetLoadAddress();
lldb::SBAddress
GetAddress();
lldb::SBValue
Persist ();
%feature("docstring", "Returns an expression path for this value."
) GetExpressionPath;
bool
GetExpressionPath (lldb::SBStream &description, bool qualify_cxx_base_classes);
%pythoncode %{
def __get_dynamic__ (self):
'''Helper function for the "SBValue.dynamic" property.'''
return self.GetDynamicValue (eDynamicCanRunTarget)
__swig_getmethods__["name"] = GetName
if _newclass: name = property(GetName, None, doc='''A read only property that returns the name of this value as a string.''')
__swig_getmethods__["type"] = GetType
if _newclass: type = property(GetType, None, doc='''A read only property that returns a lldb.SBType object that represents the type for this value.''')
__swig_getmethods__["size"] = GetByteSize
if _newclass: size = property(GetByteSize, None, doc='''A read only property that returns the size in bytes of this value.''')
__swig_getmethods__["is_in_scope"] = IsInScope
if _newclass: is_in_scope = property(IsInScope, None, doc='''A read only property that returns a boolean value that indicates whether this value is currently lexically in scope.''')
__swig_getmethods__["format"] = GetFormat
__swig_setmethods__["format"] = SetFormat
if _newclass: format = property(GetName, SetFormat, doc='''A read/write property that gets/sets the format used for lldb.SBValue().GetValue() for this value. See enumerations that start with "lldb.eFormat".''')
__swig_getmethods__["value"] = GetValue
__swig_setmethods__["value"] = SetValueFromCString
if _newclass: value = property(GetValue, SetValueFromCString, doc='''A read/write property that gets/sets value from a string.''')
__swig_getmethods__["value_type"] = GetValueType
if _newclass: value_type = property(GetValueType, None, doc='''A read only property that returns an lldb enumeration value (see enumerations that start with "lldb.eValueType") that represents the type of this value (local, argument, global, register, etc.).''')
__swig_getmethods__["changed"] = GetValueDidChange
if _newclass: changed = property(GetValueDidChange, None, doc='''A read only property that returns a boolean value that indicates if this value has changed since it was last updated.''')
__swig_getmethods__["data"] = GetData
if _newclass: data = property(GetData, None, doc='''A read only property that returns an lldb object (lldb.SBData) that represents the bytes that make up the value for this object.''')
__swig_getmethods__["load_addr"] = GetLoadAddress
if _newclass: load_addr = property(GetLoadAddress, None, doc='''A read only property that returns the load address of this value as an integer.''')
__swig_getmethods__["addr"] = GetAddress
if _newclass: addr = property(GetAddress, None, doc='''A read only property that returns an lldb.SBAddress that represents the address of this value if it is in memory.''')
__swig_getmethods__["deref"] = Dereference
if _newclass: deref = property(Dereference, None, doc='''A read only property that returns an lldb.SBValue that is created by dereferencing this value.''')
__swig_getmethods__["address_of"] = AddressOf
if _newclass: address_of = property(AddressOf, None, doc='''A read only property that returns an lldb.SBValue that represents the address-of this value.''')
__swig_getmethods__["error"] = GetError
if _newclass: error = property(GetError, None, doc='''A read only property that returns the lldb.SBError that represents the error from the last time the variable value was calculated.''')
__swig_getmethods__["summary"] = GetSummary
if _newclass: summary = property(GetSummary, None, doc='''A read only property that returns the summary for this value as a string''')
__swig_getmethods__["description"] = GetObjectDescription
if _newclass: description = property(GetObjectDescription, None, doc='''A read only property that returns the language-specific description of this value as a string''')
__swig_getmethods__["dynamic"] = __get_dynamic__
if _newclass: dynamic = property(__get_dynamic__, None, doc='''A read only property that returns an lldb.SBValue that is created by finding the dynamic type of this value.''')
__swig_getmethods__["location"] = GetLocation
if _newclass: location = property(GetLocation, None, doc='''A read only property that returns the location of this value as a string.''')
__swig_getmethods__["target"] = GetTarget
if _newclass: target = property(GetTarget, None, doc='''A read only property that returns the lldb.SBTarget that this value is associated with.''')
__swig_getmethods__["process"] = GetProcess
if _newclass: process = property(GetProcess, None, doc='''A read only property that returns the lldb.SBProcess that this value is associated with, the returned value might be invalid and should be tested.''')
__swig_getmethods__["thread"] = GetThread
if _newclass: thread = property(GetThread, None, doc='''A read only property that returns the lldb.SBThread that this value is associated with, the returned value might be invalid and should be tested.''')
__swig_getmethods__["frame"] = GetFrame
if _newclass: frame = property(GetFrame, None, doc='''A read only property that returns the lldb.SBFrame that this value is associated with, the returned value might be invalid and should be tested.''')
__swig_getmethods__["num_children"] = GetNumChildren
if _newclass: num_children = property(GetNumChildren, None, doc='''A read only property that returns the number of child lldb.SBValues that this value has.''')
__swig_getmethods__["unsigned"] = GetValueAsUnsigned
if _newclass: unsigned = property(GetValueAsUnsigned, None, doc='''A read only property that returns the value of this SBValue as an usigned integer.''')
__swig_getmethods__["signed"] = GetValueAsSigned
if _newclass: signed = property(GetValueAsSigned, None, doc='''A read only property that returns the value of this SBValue as a signed integer.''')
def get_expr_path(self):
s = SBStream()
self.GetExpressionPath (s)
return s.GetData()
__swig_getmethods__["path"] = get_expr_path
if _newclass: path = property(get_expr_path, None, doc='''A read only property that returns the expression path that one can use to reach this value in an expression.''')
def synthetic_child_from_expression(self, name, expr, options=None):
if options is None: options = lldb.SBExpressionOptions()
child = self.CreateValueFromExpression(name, expr, options)
child.SetSyntheticChildrenGenerated(True)
return child
def synthetic_child_from_data(self, name, data, type):
child = self.CreateValueFromData(name, data, type)
child.SetSyntheticChildrenGenerated(True)
return child
def synthetic_child_from_address(self, name, addr, type):
child = self.CreateValueFromAddress(name, addr, type)
child.SetSyntheticChildrenGenerated(True)
return child
%}
};
} // namespace lldb
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