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llvm-project/lldb/source/Target/StackFrame.cpp
Greg Clayton 5ccbd294b2 Fixed issues with RegisterContext classes and the subclasses. There was 
an issue with the way the UnwindLLDB was handing out RegisterContexts: it
was making shared pointers to register contexts and then handing out just
the pointers (which would get put into shared pointers in the thread and
stack frame classes) and cause double free issues. MallocScribble helped to
find these issues after I did some other cleanup. To help avoid any
RegisterContext issue in the future, all code that deals with them now
returns shared pointers to the register contexts so we don't end up with
multiple deletions. Also now that the RegisterContext class doesn't require
a stack frame, we patched a memory leak where a StackFrame object was being
created and leaked.

Made the RegisterContext class not have a pointer to a StackFrame object as
one register context class can be used for N inlined stack frames so there is
not a 1 - 1 mapping. Updates the ExecutionContextScope part of the 
RegisterContext class to never return a stack frame to indicate this when it
is asked to recreate the execution context. Now register contexts point to the
concrete frame using a concrete frame index. Concrete frames are all of the
frames that are actually formed on the stack of a thread. These concrete frames
can be turned into one or more user visible frames due to inlining. Each 
inlined stack frame has the exact same register context (shared via shared
pointers) as any parent inlined stack frames all the way up to the concrete 
frame itself.

So now the stack frames and the register contexts should behave much better.

llvm-svn: 122976
2011-01-06 22:15:06 +00:00

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//===-- StackFrame.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/StackFrame.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Module.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
using namespace lldb;
using namespace lldb_private;
// The first bits in the flags are reserved for the SymbolContext::Scope bits
// so we know if we have tried to look up information in our internal symbol
// context (m_sc) already.
#define RESOLVED_FRAME_CODE_ADDR (uint32_t(eSymbolContextEverything + 1))
#define RESOLVED_FRAME_ID_SYMBOL_SCOPE (RESOLVED_FRAME_CODE_ADDR << 1)
#define GOT_FRAME_BASE (RESOLVED_FRAME_ID_SYMBOL_SCOPE << 1)
#define RESOLVED_VARIABLES (GOT_FRAME_BASE << 1)
#define RESOLVED_GLOBAL_VARIABLES (RESOLVED_VARIABLES << 1)
StackFrame::StackFrame
(
lldb::user_id_t frame_idx,
lldb::user_id_t unwind_frame_index,
Thread &thread,
lldb::addr_t cfa,
lldb::addr_t pc,
const SymbolContext *sc_ptr
) :
m_frame_index (frame_idx),
m_concrete_frame_index (unwind_frame_index),
m_thread (thread),
m_reg_context_sp (),
m_id (pc, cfa, NULL),
m_frame_code_addr (NULL, pc),
m_sc (),
m_flags (),
m_frame_base (),
m_frame_base_error (),
m_variable_list_sp (),
m_variable_list_value_objects ()
{
if (sc_ptr != NULL)
{
m_sc = *sc_ptr;
m_flags.Set(m_sc.GetResolvedMask ());
}
}
StackFrame::StackFrame
(
lldb::user_id_t frame_idx,
lldb::user_id_t unwind_frame_index,
Thread &thread,
const RegisterContextSP &reg_context_sp,
lldb::addr_t cfa,
lldb::addr_t pc,
const SymbolContext *sc_ptr
) :
m_frame_index (frame_idx),
m_concrete_frame_index (unwind_frame_index),
m_thread (thread),
m_reg_context_sp (reg_context_sp),
m_id (pc, cfa, NULL),
m_frame_code_addr (NULL, pc),
m_sc (),
m_flags (),
m_frame_base (),
m_frame_base_error (),
m_variable_list_sp (),
m_variable_list_value_objects ()
{
if (sc_ptr != NULL)
{
m_sc = *sc_ptr;
m_flags.Set(m_sc.GetResolvedMask ());
}
if (reg_context_sp && !m_sc.target_sp)
{
m_sc.target_sp = reg_context_sp->GetThread().GetProcess().GetTarget().GetSP();
m_flags.Set (eSymbolContextTarget);
}
}
StackFrame::StackFrame
(
lldb::user_id_t frame_idx,
lldb::user_id_t unwind_frame_index,
Thread &thread,
const RegisterContextSP &reg_context_sp,
lldb::addr_t cfa,
const Address& pc_addr,
const SymbolContext *sc_ptr
) :
m_frame_index (frame_idx),
m_concrete_frame_index (unwind_frame_index),
m_thread (thread),
m_reg_context_sp (reg_context_sp),
m_id (pc_addr.GetLoadAddress (&thread.GetProcess().GetTarget()), cfa, NULL),
m_frame_code_addr (pc_addr),
m_sc (),
m_flags (),
m_frame_base (),
m_frame_base_error (),
m_variable_list_sp (),
m_variable_list_value_objects ()
{
if (sc_ptr != NULL)
{
m_sc = *sc_ptr;
m_flags.Set(m_sc.GetResolvedMask ());
}
if (m_sc.target_sp.get() == NULL && reg_context_sp)
{
m_sc.target_sp = reg_context_sp->GetThread().GetProcess().GetTarget().GetSP();
m_flags.Set (eSymbolContextTarget);
}
Module *pc_module = pc_addr.GetModule();
if (m_sc.module_sp.get() == NULL || m_sc.module_sp.get() != pc_module)
{
if (pc_module)
{
m_sc.module_sp = pc_module->GetSP();
m_flags.Set (eSymbolContextModule);
}
else
{
m_sc.module_sp.reset();
}
}
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
StackFrame::~StackFrame()
{
}
StackID&
StackFrame::GetStackID()
{
// Make sure we have resolved the StackID object's symbol context scope if
// we already haven't looked it up.
if (m_flags.IsClear (RESOLVED_FRAME_ID_SYMBOL_SCOPE))
{
if (m_id.GetSymbolContextScope ())
{
// We already have a symbol context scope, we just don't have our
// flag bit set.
m_flags.Set (RESOLVED_FRAME_ID_SYMBOL_SCOPE);
}
else
{
// Calculate the frame block and use this for the stack ID symbol
// context scope if we have one.
SymbolContextScope *scope = GetFrameBlock ();
if (scope == NULL)
{
// We don't have a block, so use the symbol
if (m_flags.IsClear (eSymbolContextSymbol))
GetSymbolContext (eSymbolContextSymbol);
// It is ok if m_sc.symbol is NULL here
scope = m_sc.symbol;
}
// Set the symbol context scope (the accessor will set the
// RESOLVED_FRAME_ID_SYMBOL_SCOPE bit in m_flags).
SetSymbolContextScope (scope);
}
}
return m_id;
}
void
StackFrame::SetSymbolContextScope (SymbolContextScope *symbol_scope)
{
m_flags.Set (RESOLVED_FRAME_ID_SYMBOL_SCOPE);
m_id.SetSymbolContextScope (symbol_scope);
}
Address&
StackFrame::GetFrameCodeAddress()
{
if (m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR) && !m_frame_code_addr.IsSectionOffset())
{
m_flags.Set (RESOLVED_FRAME_CODE_ADDR);
// Resolve the PC into a temporary address because if ResolveLoadAddress
// fails to resolve the address, it will clear the address object...
Address resolved_pc;
if (m_thread.GetProcess().GetTarget().GetSectionLoadList().ResolveLoadAddress(m_frame_code_addr.GetOffset(), resolved_pc))
{
m_frame_code_addr = resolved_pc;
const Section *section = m_frame_code_addr.GetSection();
if (section)
{
Module *module = section->GetModule();
if (module)
{
m_sc.module_sp = module->GetSP();
if (m_sc.module_sp)
m_flags.Set(eSymbolContextModule);
}
}
}
}
return m_frame_code_addr;
}
void
StackFrame::ChangePC (addr_t pc)
{
m_frame_code_addr.SetOffset(pc);
m_frame_code_addr.SetSection(NULL);
m_sc.Clear();
m_flags.Reset(0);
m_thread.ClearStackFrames ();
}
const char *
StackFrame::Disassemble ()
{
if (m_disassembly.GetSize() == 0)
{
ExecutionContext exe_ctx;
CalculateExecutionContext(exe_ctx);
Target &target = m_thread.GetProcess().GetTarget();
Disassembler::Disassemble (target.GetDebugger(),
target.GetArchitecture(),
exe_ctx,
0,
false,
m_disassembly);
if (m_disassembly.GetSize() == 0)
return NULL;
}
return m_disassembly.GetData();
}
Block *
StackFrame::GetFrameBlock ()
{
if (m_sc.block == NULL && m_flags.IsClear (eSymbolContextBlock))
GetSymbolContext (eSymbolContextBlock);
if (m_sc.block)
{
Block *inline_block = m_sc.block->GetContainingInlinedBlock();
if (inline_block)
{
// Use the block with the inlined function info
// as the frame block we want this frame to have only the variables
// for the inlined function and its non-inlined block child blocks.
return inline_block;
}
else
{
// This block is not contained withing any inlined function blocks
// with so we want to use the top most function block.
return &m_sc.function->GetBlock (false);
}
}
return NULL;
}
//----------------------------------------------------------------------
// Get the symbol context if we already haven't done so by resolving the
// PC address as much as possible. This way when we pass around a
// StackFrame object, everyone will have as much information as
// possible and no one will ever have to look things up manually.
//----------------------------------------------------------------------
const SymbolContext&
StackFrame::GetSymbolContext (uint32_t resolve_scope)
{
// Copy our internal symbol context into "sc".
if ((m_flags.Get() & resolve_scope) != resolve_scope)
{
// Resolve our PC to section offset if we haven't alreday done so
// and if we don't have a module. The resolved address section will
// contain the module to which it belongs
if (!m_sc.module_sp && m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR))
GetFrameCodeAddress();
// If this is not frame zero, then we need to subtract 1 from the PC
// value when doing address lookups since the PC will be on the
// instruction following the function call instruction...
Address lookup_addr(GetFrameCodeAddress());
if (m_frame_index > 0 && lookup_addr.IsValid())
{
addr_t offset = lookup_addr.GetOffset();
if (offset > 0)
lookup_addr.SetOffset(offset - 1);
}
uint32_t resolved = 0;
if (m_sc.module_sp)
{
// We have something in our stack frame symbol context, lets check
// if we haven't already tried to lookup one of those things. If we
// haven't then we will do the query.
uint32_t actual_resolve_scope = 0;
if (resolve_scope & eSymbolContextCompUnit)
{
if (m_flags.IsClear (eSymbolContextCompUnit))
{
if (m_sc.comp_unit)
resolved |= eSymbolContextCompUnit;
else
actual_resolve_scope |= eSymbolContextCompUnit;
}
}
if (resolve_scope & eSymbolContextFunction)
{
if (m_flags.IsClear (eSymbolContextFunction))
{
if (m_sc.function)
resolved |= eSymbolContextFunction;
else
actual_resolve_scope |= eSymbolContextFunction;
}
}
if (resolve_scope & eSymbolContextBlock)
{
if (m_flags.IsClear (eSymbolContextBlock))
{
if (m_sc.block)
resolved |= eSymbolContextBlock;
else
actual_resolve_scope |= eSymbolContextBlock;
}
}
if (resolve_scope & eSymbolContextSymbol)
{
if (m_flags.IsClear (eSymbolContextSymbol))
{
if (m_sc.symbol)
resolved |= eSymbolContextSymbol;
else
actual_resolve_scope |= eSymbolContextSymbol;
}
}
if (resolve_scope & eSymbolContextLineEntry)
{
if (m_flags.IsClear (eSymbolContextLineEntry))
{
if (m_sc.line_entry.IsValid())
resolved |= eSymbolContextLineEntry;
else
actual_resolve_scope |= eSymbolContextLineEntry;
}
}
if (actual_resolve_scope)
{
// We might be resolving less information than what is already
// in our current symbol context so resolve into a temporary
// symbol context "sc" so we don't clear out data we have
// already found in "m_sc"
SymbolContext sc;
// Set flags that indicate what we have tried to resolve
resolved |= m_sc.module_sp->ResolveSymbolContextForAddress (lookup_addr, actual_resolve_scope, sc);
// Only replace what we didn't already have as we may have
// information for an inlined function scope that won't match
// what a standard lookup by address would match
if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == NULL)
m_sc.comp_unit = sc.comp_unit;
if ((resolved & eSymbolContextFunction) && m_sc.function == NULL)
m_sc.function = sc.function;
if ((resolved & eSymbolContextBlock) && m_sc.block == NULL)
m_sc.block = sc.block;
if ((resolved & eSymbolContextSymbol) && m_sc.symbol == NULL)
m_sc.symbol = sc.symbol;
if ((resolved & eSymbolContextLineEntry) && !m_sc.line_entry.IsValid())
m_sc.line_entry = sc.line_entry;
}
}
else
{
// If we don't have a module, then we can't have the compile unit,
// function, block, line entry or symbol, so we can safely call
// ResolveSymbolContextForAddress with our symbol context member m_sc.
resolved |= m_thread.GetProcess().GetTarget().GetImages().ResolveSymbolContextForAddress (lookup_addr, resolve_scope, m_sc);
}
// If the target was requested add that:
if (m_sc.target_sp.get() == NULL)
{
m_sc.target_sp = CalculateProcess()->GetTarget().GetSP();
if (m_sc.target_sp)
resolved |= eSymbolContextTarget;
}
// Update our internal flags so we remember what we have tried to locate so
// we don't have to keep trying when more calls to this function are made.
// We might have dug up more information that was requested (for example
// if we were asked to only get the block, we will have gotten the
// compile unit, and function) so set any additional bits that we resolved
m_flags.Set (resolve_scope | resolved);
}
// Return the symbol context with everything that was possible to resolve
// resolved.
return m_sc;
}
VariableList *
StackFrame::GetVariableList (bool get_file_globals)
{
if (m_flags.IsClear(RESOLVED_VARIABLES))
{
m_flags.Set(RESOLVED_VARIABLES);
Block *frame_block = GetFrameBlock();
if (frame_block)
{
const bool get_child_variables = true;
const bool can_create = true;
m_variable_list_sp = frame_block->GetVariableList (get_child_variables, can_create);
}
}
if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) &&
get_file_globals)
{
m_flags.Set(RESOLVED_GLOBAL_VARIABLES);
if (m_flags.IsClear (eSymbolContextCompUnit))
GetSymbolContext (eSymbolContextCompUnit);
if (m_sc.comp_unit)
{
VariableListSP global_variable_list_sp (m_sc.comp_unit->GetVariableList(true));
if (m_variable_list_sp)
m_variable_list_sp->AddVariables (global_variable_list_sp.get());
else
m_variable_list_sp = global_variable_list_sp;
}
}
return m_variable_list_sp.get();
}
ValueObjectSP
StackFrame::GetValueForVariableExpressionPath (const char *var_expr_cstr, bool check_ptr_vs_member, Error &error)
{
if (var_expr_cstr && var_expr_cstr[0])
{
error.Clear();
bool deref = false;
bool address_of = false;
ValueObjectSP valobj_sp;
const bool get_file_globals = true;
VariableList *variable_list = GetVariableList (get_file_globals);
if (variable_list)
{
// If first character is a '*', then show pointer contents
const char *var_expr = var_expr_cstr;
if (var_expr[0] == '*')
{
deref = true;
var_expr++; // Skip the '*'
}
else if (var_expr[0] == '&')
{
address_of = true;
var_expr++; // Skip the '&'
}
std::string var_path (var_expr);
size_t separator_idx = var_path.find_first_of(".-[=+~|&^%#@!/?,<>{}");
StreamString var_expr_path_strm;
ConstString name_const_string;
if (separator_idx == std::string::npos)
name_const_string.SetCString (var_path.c_str());
else
name_const_string.SetCStringWithLength (var_path.c_str(), separator_idx);
VariableSP var_sp (variable_list->FindVariable(name_const_string));
if (var_sp)
{
valobj_sp = GetValueObjectForFrameVariable (var_sp);
var_path.erase (0, name_const_string.GetLength ());
// We are dumping at least one child
while (separator_idx != std::string::npos)
{
// Calculate the next separator index ahead of time
ValueObjectSP child_valobj_sp;
const char separator_type = var_path[0];
switch (separator_type)
{
case '-':
if (var_path.size() >= 2 && var_path[1] != '>')
return ValueObjectSP();
var_path.erase (0, 1); // Remove the '-'
// Fall through
case '.':
{
const bool expr_is_ptr = var_path[0] == '>';
var_path.erase (0, 1); // Remove the '.' or '>'
separator_idx = var_path.find_first_of(".-[");
ConstString child_name;
if (separator_idx == std::string::npos)
child_name.SetCString (var_path.c_str());
else
child_name.SetCStringWithLength(var_path.c_str(), separator_idx);
if (check_ptr_vs_member)
{
// We either have a pointer type and need to verify
// valobj_sp is a pointer, or we have a member of a
// class/union/struct being accessed with the . syntax
// and need to verify we don't have a pointer.
const bool actual_is_ptr = valobj_sp->IsPointerType ();
if (actual_is_ptr != expr_is_ptr)
{
// Incorrect use of "." with a pointer, or "->" with
// a class/union/struct instance or reference.
valobj_sp->GetExpressionPath (var_expr_path_strm);
if (actual_is_ptr)
error.SetErrorStringWithFormat ("\"%s\" is a pointer and . was used to attempt to access \"%s\". Did you mean \"%s->%s\"?",
var_expr_path_strm.GetString().c_str(),
child_name.GetCString(),
var_expr_path_strm.GetString().c_str(),
var_path.c_str());
else
error.SetErrorStringWithFormat ("\"%s\" is not a pointer and -> was used to attempt to access \"%s\". Did you mean \"%s.%s\"?",
var_expr_path_strm.GetString().c_str(),
child_name.GetCString(),
var_expr_path_strm.GetString().c_str(),
var_path.c_str());
return ValueObjectSP();
}
}
child_valobj_sp = valobj_sp->GetChildMemberWithName (child_name, true);
if (!child_valobj_sp)
{
// No child member with name "child_name"
valobj_sp->GetExpressionPath (var_expr_path_strm);
if (child_name)
{
error.SetErrorStringWithFormat ("\"%s\" is not a member of \"(%s) %s\"",
child_name.GetCString(),
valobj_sp->GetTypeName().AsCString("<invalid type>"),
var_expr_path_strm.GetString().c_str());
}
else
{
error.SetErrorStringWithFormat ("incomplete expression path after \"%s\" in \"%s\"",
var_expr_path_strm.GetString().c_str(),
var_expr_cstr);
}
return ValueObjectSP();
}
// Remove the child name from the path
var_path.erase(0, child_name.GetLength());
}
break;
case '[':
// Array member access, or treating pointer as an array
if (var_path.size() > 2) // Need at least two brackets and a number
{
char *end = NULL;
int32_t child_index = ::strtol (&var_path[1], &end, 0);
if (end && *end == ']')
{
if (valobj_sp->IsPointerType ())
{
child_valobj_sp = valobj_sp->GetSyntheticArrayMemberFromPointer (child_index, true);
if (!child_valobj_sp)
{
valobj_sp->GetExpressionPath (var_expr_path_strm);
error.SetErrorStringWithFormat ("failed to use pointer as array for index %i for \"(%s) %s\"",
child_index,
valobj_sp->GetTypeName().AsCString("<invalid type>"),
var_expr_path_strm.GetString().c_str());
}
}
else if (ClangASTContext::IsArrayType (valobj_sp->GetClangType(), NULL, NULL))
{
child_valobj_sp = valobj_sp->GetChildAtIndex (child_index, true);
if (!child_valobj_sp)
{
valobj_sp->GetExpressionPath (var_expr_path_strm);
error.SetErrorStringWithFormat ("array index %i is not valid for \"(%s) %s\"",
child_index,
valobj_sp->GetTypeName().AsCString("<invalid type>"),
var_expr_path_strm.GetString().c_str());
}
}
else
{
valobj_sp->GetExpressionPath (var_expr_path_strm);
error.SetErrorStringWithFormat ("\"(%s) %s\" is not an array type",
valobj_sp->GetTypeName().AsCString("<invalid type>"),
var_expr_path_strm.GetString().c_str());
}
if (!child_valobj_sp)
{
// Invalid array index...
return ValueObjectSP();
}
// Erase the array member specification '[%i]' where
// %i is the array index
var_path.erase(0, (end - var_path.c_str()) + 1);
separator_idx = var_path.find_first_of(".-[");
// Break out early from the switch since we were
// able to find the child member
break;
}
}
return ValueObjectSP();
default:
// Failure...
{
valobj_sp->GetExpressionPath (var_expr_path_strm);
error.SetErrorStringWithFormat ("unexpected char '%c' encountered after \"%s\" in \"%s\"",
separator_type,
var_expr_path_strm.GetString().c_str(),
var_path.c_str());
return ValueObjectSP();
}
}
if (child_valobj_sp)
valobj_sp = child_valobj_sp;
if (var_path.empty())
break;
}
if (valobj_sp)
{
if (deref)
{
ValueObjectSP deref_valobj_sp (valobj_sp->Dereference(error));
valobj_sp = deref_valobj_sp;
}
else if (address_of)
{
ValueObjectSP address_of_valobj_sp (valobj_sp->AddressOf(error));
valobj_sp = address_of_valobj_sp;
}
}
return valobj_sp;
}
else
{
error.SetErrorStringWithFormat("no variable named '%s' found in this frame", name_const_string.GetCString());
}
}
}
else
{
error.SetErrorStringWithFormat("invalid variable path '%s'", var_expr_cstr);
}
return ValueObjectSP();
}
bool
StackFrame::GetFrameBaseValue (Scalar &frame_base, Error *error_ptr)
{
if (m_flags.IsClear(GOT_FRAME_BASE))
{
if (m_sc.function)
{
m_frame_base.Clear();
m_frame_base_error.Clear();
m_flags.Set(GOT_FRAME_BASE);
ExecutionContext exe_ctx (&m_thread.GetProcess(), &m_thread, this);
Value expr_value;
addr_t loclist_base_addr = LLDB_INVALID_ADDRESS;
if (m_sc.function->GetFrameBaseExpression().IsLocationList())
loclist_base_addr = m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (&m_thread.GetProcess().GetTarget());
if (m_sc.function->GetFrameBaseExpression().Evaluate(&exe_ctx, NULL, NULL, loclist_base_addr, NULL, expr_value, &m_frame_base_error) == false)
{
// We should really have an error if evaluate returns, but in case
// we don't, lets set the error to something at least.
if (m_frame_base_error.Success())
m_frame_base_error.SetErrorString("Evaluation of the frame base expression failed.");
}
else
{
m_frame_base = expr_value.ResolveValue(&exe_ctx, NULL);
}
}
else
{
m_frame_base_error.SetErrorString ("No function in symbol context.");
}
}
if (m_frame_base_error.Success())
frame_base = m_frame_base;
if (error_ptr)
*error_ptr = m_frame_base_error;
return m_frame_base_error.Success();
}
RegisterContextSP
StackFrame::GetRegisterContext ()
{
if (!m_reg_context_sp)
m_reg_context_sp = m_thread.CreateRegisterContextForFrame (this);
return m_reg_context_sp;
}
bool
StackFrame::HasDebugInformation ()
{
GetSymbolContext (eSymbolContextLineEntry);
return m_sc.line_entry.IsValid();
}
ValueObjectSP
StackFrame::GetValueObjectForFrameVariable (const VariableSP &variable_sp)
{
ValueObjectSP valobj_sp;
VariableList *var_list = GetVariableList (true);
if (var_list)
{
// Make sure the variable is a frame variable
const uint32_t var_idx = var_list->FindIndexForVariable (variable_sp.get());
const uint32_t num_variables = var_list->GetSize();
if (var_idx < num_variables)
{
valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex (var_idx);
if (valobj_sp.get() == NULL)
{
if (m_variable_list_value_objects.GetSize() < num_variables)
m_variable_list_value_objects.Resize(num_variables);
valobj_sp.reset (new ValueObjectVariable (variable_sp));
m_variable_list_value_objects.SetValueObjectAtIndex (var_idx, valobj_sp);
}
}
}
return valobj_sp;
}
ValueObjectSP
StackFrame::TrackGlobalVariable (const VariableSP &variable_sp)
{
// Check to make sure we aren't already tracking this variable?
ValueObjectSP valobj_sp (GetValueObjectForFrameVariable (variable_sp));
if (!valobj_sp)
{
// We aren't already tracking this global
VariableList *var_list = GetVariableList (true);
// If this frame has no variables, create a new list
if (var_list == NULL)
m_variable_list_sp.reset (new VariableList());
// Add the global/static variable to this frame
m_variable_list_sp->AddVariable (variable_sp);
// Now make a value object for it so we can track its changes
valobj_sp = GetValueObjectForFrameVariable (variable_sp);
}
return valobj_sp;
}
bool
StackFrame::IsInlined ()
{
if (m_sc.block == NULL)
GetSymbolContext (eSymbolContextBlock);
if (m_sc.block)
return m_sc.block->GetContainingInlinedBlock() != NULL;
return false;
}
Target *
StackFrame::CalculateTarget ()
{
return m_thread.CalculateTarget();
}
Process *
StackFrame::CalculateProcess ()
{
return m_thread.CalculateProcess();
}
Thread *
StackFrame::CalculateThread ()
{
return &m_thread;
}
StackFrame *
StackFrame::CalculateStackFrame ()
{
return this;
}
void
StackFrame::CalculateExecutionContext (ExecutionContext &exe_ctx)
{
m_thread.CalculateExecutionContext (exe_ctx);
exe_ctx.frame = this;
}
void
StackFrame::DumpUsingSettingsFormat (Stream *strm)
{
if (strm == NULL)
return;
GetSymbolContext(eSymbolContextEverything);
ExecutionContext exe_ctx;
CalculateExecutionContext(exe_ctx);
const char *end = NULL;
StreamString s;
const char *frame_format = m_thread.GetProcess().GetTarget().GetDebugger().GetFrameFormat();
if (frame_format && Debugger::FormatPrompt (frame_format, &m_sc, &exe_ctx, NULL, s, &end))
{
strm->Write(s.GetData(), s.GetSize());
}
else
{
Dump (strm, true, false);
strm->EOL();
}
}
void
StackFrame::Dump (Stream *strm, bool show_frame_index, bool show_fullpaths)
{
if (strm == NULL)
return;
if (show_frame_index)
strm->Printf("frame #%u: ", m_frame_index);
strm->Printf("0x%0*llx ", m_thread.GetProcess().GetAddressByteSize() * 2, GetFrameCodeAddress().GetLoadAddress(&m_thread.GetProcess().GetTarget()));
GetSymbolContext(eSymbolContextEverything);
const bool show_module = true;
const bool show_inline = true;
m_sc.DumpStopContext(strm, &m_thread.GetProcess(), GetFrameCodeAddress(), show_fullpaths, show_module, show_inline);
}
void
StackFrame::UpdateCurrentFrameFromPreviousFrame (StackFrame &prev_frame)
{
assert (GetStackID() == prev_frame.GetStackID()); // TODO: remove this after some testing
m_variable_list_sp = prev_frame.m_variable_list_sp;
m_variable_list_value_objects.Swap (prev_frame.m_variable_list_value_objects);
if (!m_disassembly.GetString().empty())
m_disassembly.GetString().swap (m_disassembly.GetString());
}
void
StackFrame::UpdatePreviousFrameFromCurrentFrame (StackFrame &curr_frame)
{
assert (GetStackID() == curr_frame.GetStackID()); // TODO: remove this after some testing
m_id.SetPC (curr_frame.m_id.GetPC()); // Update the Stack ID PC value
assert (&m_thread == &curr_frame.m_thread);
m_frame_index = curr_frame.m_frame_index;
m_concrete_frame_index = curr_frame.m_concrete_frame_index;
m_reg_context_sp = curr_frame.m_reg_context_sp;
m_frame_code_addr = curr_frame.m_frame_code_addr;
assert (m_sc.target_sp.get() == NULL || curr_frame.m_sc.target_sp.get() == NULL || m_sc.target_sp.get() == curr_frame.m_sc.target_sp.get());
assert (m_sc.module_sp.get() == NULL || curr_frame.m_sc.module_sp.get() == NULL || m_sc.module_sp.get() == curr_frame.m_sc.module_sp.get());
assert (m_sc.comp_unit == NULL || curr_frame.m_sc.comp_unit == NULL || m_sc.comp_unit == curr_frame.m_sc.comp_unit);
assert (m_sc.function == NULL || curr_frame.m_sc.function == NULL || m_sc.function == curr_frame.m_sc.function);
m_sc = curr_frame.m_sc;
m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything);
m_flags.Set (m_sc.GetResolvedMask());
m_frame_base.Clear();
m_frame_base_error.Clear();
}
bool
StackFrame::HasCachedData () const
{
if (m_variable_list_sp.get())
return true;
if (m_variable_list_value_objects.GetSize() > 0)
return true;
if (!m_disassembly.GetString().empty())
return true;
return false;
}
lldb::StackFrameSP
StackFrame::GetSP ()
{
return m_thread.GetStackFrameSPForStackFramePtr (this);
}
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