bool
AppleObjCRuntime::GetObjectDescription (Stream &strm, Value &value, ExecutionContextScope *exe_scope)
{
if (!m_read_objc_library)
return false;
ExecutionContext exe_ctx;
exe_scope->CalculateExecutionContext(exe_ctx);
Process *process = exe_ctx.GetProcessPtr();
if (!process)
return false;
// We need other parts of the exe_ctx, but the processes have to match.
assert (m_process == process);
// Get the function address for the print function.
const Address *function_address = GetPrintForDebuggerAddr();
if (!function_address)
return false;
Target *target = exe_ctx.GetTargetPtr();
CompilerType compiler_type = value.GetCompilerType();
if (compiler_type)
{
if (!ClangASTContext::IsObjCObjectPointerType(compiler_type))
{
strm.Printf ("Value doesn't point to an ObjC object.\n");
return false;
}
}
else
{
// If it is not a pointer, see if we can make it into a pointer.
ClangASTContext *ast_context = target->GetScratchClangASTContext();
CompilerType opaque_type = ast_context->GetBasicType(eBasicTypeObjCID);
if (!opaque_type)
opaque_type = ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
//value.SetContext(Value::eContextTypeClangType, opaque_type_ptr);
value.SetCompilerType (opaque_type);
}
ValueList arg_value_list;
arg_value_list.PushValue(value);
// This is the return value:
ClangASTContext *ast_context = target->GetScratchClangASTContext();
CompilerType return_compiler_type = ast_context->GetCStringType(true);
Value ret;
// ret.SetContext(Value::eContextTypeClangType, return_compiler_type);
ret.SetCompilerType (return_compiler_type);
if (exe_ctx.GetFramePtr() == NULL)
{
Thread *thread = exe_ctx.GetThreadPtr();
if (thread == NULL)
{
exe_ctx.SetThreadSP(process->GetThreadList().GetSelectedThread());
thread = exe_ctx.GetThreadPtr();
}
if (thread)
{
exe_ctx.SetFrameSP(thread->GetSelectedFrame());
}
}
// Now we're ready to call the function:
StreamString error_stream;
lldb::addr_t wrapper_struct_addr = LLDB_INVALID_ADDRESS;
if (!m_print_object_caller_up)
{
Error error;
m_print_object_caller_up.reset(exe_scope->CalculateTarget()->GetFunctionCallerForLanguage (eLanguageTypeObjC,
return_compiler_type,
*function_address,
arg_value_list,
"objc-object-description",
error));
if (error.Fail())
{
m_print_object_caller_up.reset();
strm.Printf("Could not get function runner to call print for debugger function: %s.", error.AsCString());
return false;
}
m_print_object_caller_up->InsertFunction(exe_ctx, wrapper_struct_addr, error_stream);
}
else
{
m_print_object_caller_up->WriteFunctionArguments(exe_ctx,
wrapper_struct_addr,
arg_value_list,
error_stream);
}
EvaluateExpressionOptions options;
options.SetUnwindOnError(true);
options.SetTryAllThreads(true);
options.SetStopOthers(true);
options.SetIgnoreBreakpoints(true);
options.SetTimeoutUsec(PO_FUNCTION_TIMEOUT_USEC);
options.SetLanguage(lldb::eLanguageTypeObjC_plus_plus);
ExpressionResults results = m_print_object_caller_up->ExecuteFunction (exe_ctx,
&wrapper_struct_addr,
options,
error_stream,
ret);
if (results != eExpressionCompleted)
{
strm.Printf("Error evaluating Print Object function: %d.\n", results);
return false;
}
addr_t result_ptr = ret.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
char buf[512];
size_t cstr_len = 0;
size_t full_buffer_len = sizeof (buf) - 1;
size_t curr_len = full_buffer_len;
while (curr_len == full_buffer_len)
{
Error error;
curr_len = process->ReadCStringFromMemory(result_ptr + cstr_len, buf, sizeof(buf), error);
strm.Write (buf, curr_len);
cstr_len += curr_len;
}
return cstr_len > 0;
}
bool
BreakpointLocation::ConditionSaysStop (ExecutionContext &exe_ctx, Error &error)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS);
Mutex::Locker evaluation_locker(m_condition_mutex);
size_t condition_hash;
const char *condition_text = GetConditionText(&condition_hash);
if (!condition_text)
{
m_user_expression_sp.reset();
return false;
}
if (condition_hash != m_condition_hash ||
!m_user_expression_sp ||
!m_user_expression_sp->MatchesContext(exe_ctx))
{
m_user_expression_sp.reset(new ClangUserExpression(condition_text,
NULL,
lldb::eLanguageTypeUnknown,
ClangUserExpression::eResultTypeAny));
StreamString errors;
if (!m_user_expression_sp->Parse(errors,
exe_ctx,
eExecutionPolicyOnlyWhenNeeded,
true,
false))
{
error.SetErrorStringWithFormat("Couldn't parse conditional expression:\n%s",
errors.GetData());
m_user_expression_sp.reset();
return false;
}
m_condition_hash = condition_hash;
}
// We need to make sure the user sees any parse errors in their condition, so we'll hook the
// constructor errors up to the debugger's Async I/O.
ValueObjectSP result_value_sp;
EvaluateExpressionOptions options;
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
Error expr_error;
StreamString execution_errors;
ExpressionVariableSP result_variable_sp;
ExpressionResults result_code =
m_user_expression_sp->Execute(execution_errors,
exe_ctx,
options,
m_user_expression_sp,
result_variable_sp);
bool ret;
if (result_code == eExpressionCompleted)
{
if (!result_variable_sp)
{
error.SetErrorString("Expression did not return a result");
return false;
}
result_value_sp = result_variable_sp->GetValueObject();
if (result_value_sp)
{
Scalar scalar_value;
if (result_value_sp->ResolveValue (scalar_value))
{
if (scalar_value.ULongLong(1) == 0)
ret = false;
else
ret = true;
if (log)
log->Printf("Condition successfully evaluated, result is %s.\n",
ret ? "true" : "false");
}
else
{
ret = false;
error.SetErrorString("Failed to get an integer result from the expression");
}
}
else
{
ret = false;
error.SetErrorString("Failed to get any result from the expression");
}
}
else
{
ret = false;
error.SetErrorStringWithFormat("Couldn't execute expression:\n%s", execution_errors.GetData());
}
return ret;
}
bool
lldb_private::InferiorCallMmap (Process *process,
addr_t &allocated_addr,
addr_t addr,
addr_t length,
unsigned prot,
unsigned flags,
addr_t fd,
addr_t offset)
{
Thread *thread = process->GetThreadList().GetSelectedThread().get();
if (thread == NULL)
return false;
const bool append = true;
const bool include_symbols = true;
const bool include_inlines = false;
SymbolContextList sc_list;
const uint32_t count
= process->GetTarget().GetImages().FindFunctions (ConstString ("mmap"),
eFunctionNameTypeFull,
include_symbols,
include_inlines,
append,
sc_list);
if (count > 0)
{
SymbolContext sc;
if (sc_list.GetContextAtIndex(0, sc))
{
const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
const bool use_inline_block_range = false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug (false);
options.SetTimeoutUsec(500000);
addr_t prot_arg, flags_arg = 0;
if (prot == eMmapProtNone)
prot_arg = PROT_NONE;
else {
prot_arg = 0;
if (prot & eMmapProtExec)
prot_arg |= PROT_EXEC;
if (prot & eMmapProtRead)
prot_arg |= PROT_READ;
if (prot & eMmapProtWrite)
prot_arg |= PROT_WRITE;
}
const ArchSpec arch = process->GetTarget().GetArchitecture();
flags_arg = process->GetTarget().GetPlatform()->ConvertMmapFlagsToPlatform(arch,flags);
AddressRange mmap_range;
if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, mmap_range))
{
ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
lldb::addr_t args[] = { addr, length, prot_arg, flags_arg, fd, offset };
lldb::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
mmap_range.GetBaseAddress(),
clang_void_ptr_type,
args,
options));
if (call_plan_sp)
{
StreamFile error_strm;
// This plan is a utility plan, so set it to discard itself when done.
call_plan_sp->SetIsMasterPlan (true);
call_plan_sp->SetOkayToDiscard(true);
StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
if (frame)
{
ExecutionContext exe_ctx;
frame->CalculateExecutionContext (exe_ctx);
ExpressionResults result = process->RunThreadPlan (exe_ctx,
call_plan_sp,
options,
error_strm);
if (result == eExpressionCompleted)
{
allocated_addr = call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
if (process->GetAddressByteSize() == 4)
{
if (allocated_addr == UINT32_MAX)
return false;
}
else if (process->GetAddressByteSize() == 8)
{
if (allocated_addr == UINT64_MAX)
return false;
}
return true;
}
}
}
}
}
}
return false;
}
bool
lldb_private::InferiorCall (Process *process,
const Address *address,
addr_t &returned_func)
{
Thread *thread = process->GetThreadList().GetSelectedThread().get();
if (thread == NULL || address == NULL)
return false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug (false);
options.SetTimeoutUsec(500000);
ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
lldb::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
*address,
clang_void_ptr_type,
llvm::ArrayRef<addr_t>(),
options));
if (call_plan_sp)
{
StreamString error_strm;
// This plan is a utility plan, so set it to discard itself when done.
call_plan_sp->SetIsMasterPlan (true);
call_plan_sp->SetOkayToDiscard(true);
StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
if (frame)
{
ExecutionContext exe_ctx;
frame->CalculateExecutionContext (exe_ctx);
ExpressionResults result = process->RunThreadPlan (exe_ctx,
call_plan_sp,
options,
error_strm);
if (result == eExpressionCompleted)
{
returned_func = call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
if (process->GetAddressByteSize() == 4)
{
if (returned_func == UINT32_MAX)
return false;
}
else if (process->GetAddressByteSize() == 8)
{
if (returned_func == UINT64_MAX)
return false;
}
return true;
}
}
}
return false;
}
bool
lldb_private::InferiorCallMunmap (Process *process,
addr_t addr,
addr_t length)
{
Thread *thread = process->GetThreadList().GetSelectedThread().get();
if (thread == NULL)
return false;
const bool append = true;
const bool include_symbols = true;
const bool include_inlines = false;
SymbolContextList sc_list;
const uint32_t count
= process->GetTarget().GetImages().FindFunctions (ConstString ("munmap"),
eFunctionNameTypeFull,
include_symbols,
include_inlines,
append,
sc_list);
if (count > 0)
{
SymbolContext sc;
if (sc_list.GetContextAtIndex(0, sc))
{
const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
const bool use_inline_block_range = false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug (false);
options.SetTimeoutUsec(500000);
AddressRange munmap_range;
if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, munmap_range))
{
lldb::addr_t args[] = { addr, length };
lldb::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
munmap_range.GetBaseAddress(),
CompilerType(),
args,
options));
if (call_plan_sp)
{
StreamFile error_strm;
// This plan is a utility plan, so set it to discard itself when done.
call_plan_sp->SetIsMasterPlan (true);
call_plan_sp->SetOkayToDiscard(true);
StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
if (frame)
{
ExecutionContext exe_ctx;
frame->CalculateExecutionContext (exe_ctx);
ExpressionResults result = process->RunThreadPlan (exe_ctx,
call_plan_sp,
options,
error_strm);
if (result == eExpressionCompleted)
{
return true;
}
}
}
}
}
}
return false;
}
bool BreakpointLocation::ConditionSaysStop(ExecutionContext &exe_ctx,
Status &error) {
Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS);
std::lock_guard<std::mutex> guard(m_condition_mutex);
size_t condition_hash;
const char *condition_text = GetConditionText(&condition_hash);
if (!condition_text) {
m_user_expression_sp.reset();
return false;
}
error.Clear();
DiagnosticManager diagnostics;
if (condition_hash != m_condition_hash || !m_user_expression_sp ||
!m_user_expression_sp->MatchesContext(exe_ctx)) {
LanguageType language = eLanguageTypeUnknown;
// See if we can figure out the language from the frame, otherwise use the
// default language:
CompileUnit *comp_unit = m_address.CalculateSymbolContextCompileUnit();
if (comp_unit)
language = comp_unit->GetLanguage();
m_user_expression_sp.reset(GetTarget().GetUserExpressionForLanguage(
condition_text, llvm::StringRef(), language, Expression::eResultTypeAny,
EvaluateExpressionOptions(), nullptr, error));
if (error.Fail()) {
if (log)
log->Printf("Error getting condition expression: %s.",
error.AsCString());
m_user_expression_sp.reset();
return true;
}
if (!m_user_expression_sp->Parse(diagnostics, exe_ctx,
eExecutionPolicyOnlyWhenNeeded, true,
false)) {
error.SetErrorStringWithFormat(
"Couldn't parse conditional expression:\n%s",
diagnostics.GetString().c_str());
m_user_expression_sp.reset();
return true;
}
m_condition_hash = condition_hash;
}
// We need to make sure the user sees any parse errors in their condition, so
// we'll hook the constructor errors up to the debugger's Async I/O.
ValueObjectSP result_value_sp;
EvaluateExpressionOptions options;
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetResultIsInternal(
true); // Don't generate a user variable for condition expressions.
Status expr_error;
diagnostics.Clear();
ExpressionVariableSP result_variable_sp;
ExpressionResults result_code = m_user_expression_sp->Execute(
diagnostics, exe_ctx, options, m_user_expression_sp, result_variable_sp);
bool ret;
if (result_code == eExpressionCompleted) {
if (!result_variable_sp) {
error.SetErrorString("Expression did not return a result");
return false;
}
result_value_sp = result_variable_sp->GetValueObject();
if (result_value_sp) {
ret = result_value_sp->IsLogicalTrue(error);
if (log) {
if (error.Success()) {
log->Printf("Condition successfully evaluated, result is %s.\n",
ret ? "true" : "false");
} else {
error.SetErrorString(
"Failed to get an integer result from the expression");
ret = false;
}
}
} else {
ret = false;
error.SetErrorString("Failed to get any result from the expression");
}
} else {
ret = false;
error.SetErrorStringWithFormat("Couldn't execute expression:\n%s",
diagnostics.GetString().c_str());
}
return ret;
}