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

342 lines
10 KiB
C++

//===-- 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();
SBError
GetError();
lldb::user_id_t
GetID ();
const char *
GetName();
const char *
GetTypeName ();
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 *
GetObjectDescription ();
const char *
GetLocation ();
bool
SetValueFromCString (const char *value_str);
lldb::SBValue
GetChildAtIndex (uint32_t idx);
%feature("docstring", "
//------------------------------------------------------------------
/// Get a child value by index from a value.
///
/// Structs, unions, classes, arrays and 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).
///
/// 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 wether 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
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 wether 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);
uint32_t
GetNumChildren ();
void *
GetOpaqueType();
lldb::SBValue
Dereference ();
lldb::SBValue
AddressOf();
bool
TypeIsPointerType ();
lldb::SBTarget
GetTarget();
lldb::SBProcess
GetProcess();
lldb::SBThread
GetThread();
lldb::SBFrame
GetFrame();
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 ();
lldb::addr_t
GetLoadAddress();
lldb::SBAddress
GetAddress();
%feature("docstring", "Returns an expression path for this value."
) GetExpressionPath;
bool
GetExpressionPath (lldb::SBStream &description, bool qualify_cxx_base_classes);
};
} // namespace lldb