bool
ClangUserExpression::LockAndCheckContext (ExecutionContext &exe_ctx,
lldb::TargetSP &target_sp,
lldb::ProcessSP &process_sp,
lldb::StackFrameSP &frame_sp)
{
lldb::ProcessSP expected_process_sp = m_process_wp.lock();
process_sp = exe_ctx.GetProcessSP();
if (process_sp != expected_process_sp)
return false;
process_sp = exe_ctx.GetProcessSP();
target_sp = exe_ctx.GetTargetSP();
frame_sp = exe_ctx.GetFrameSP();
if (m_address.IsValid())
{
if (!frame_sp)
return false;
else
return (0 == Address::CompareLoadAddress(m_address, frame_sp->GetFrameCodeAddress(), target_sp.get()));
}
return true;
}
void UserExpression::InstallContext(ExecutionContext &exe_ctx) {
m_jit_process_wp = exe_ctx.GetProcessSP();
lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP();
if (frame_sp)
m_address = frame_sp->GetFrameCodeAddress();
}
lldb_private::Error
ClangExpressionParser::PrepareForExecution (lldb::addr_t &func_addr,
lldb::addr_t &func_end,
lldb::IRExecutionUnitSP &execution_unit_sp,
ExecutionContext &exe_ctx,
bool &can_interpret,
ExecutionPolicy execution_policy)
{
func_addr = LLDB_INVALID_ADDRESS;
func_end = LLDB_INVALID_ADDRESS;
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
lldb_private::Error err;
std::unique_ptr<llvm::Module> llvm_module_ap (m_code_generator->ReleaseModule());
if (!llvm_module_ap.get())
{
err.SetErrorToGenericError();
err.SetErrorString("IR doesn't contain a module");
return err;
}
ConstString function_name;
if (execution_policy != eExecutionPolicyTopLevel)
{
// Find the actual name of the function (it's often mangled somehow)
if (!FindFunctionInModule(function_name, llvm_module_ap.get(), m_expr.FunctionName()))
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't find %s() in the module", m_expr.FunctionName());
return err;
}
else
{
if (log)
log->Printf("Found function %s for %s", function_name.AsCString(), m_expr.FunctionName());
}
}
SymbolContext sc;
if (lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP())
{
sc = frame_sp->GetSymbolContext(lldb::eSymbolContextEverything);
}
else if (lldb::TargetSP target_sp = exe_ctx.GetTargetSP())
{
sc.target_sp = target_sp;
}
LLVMUserExpression::IRPasses custom_passes;
{
auto lang = m_expr.Language();
if (log)
log->Printf("%s - Currrent expression language is %s\n", __FUNCTION__,
Language::GetNameForLanguageType(lang));
if (lang != lldb::eLanguageTypeUnknown)
{
auto runtime = exe_ctx.GetProcessSP()->GetLanguageRuntime(lang);
if (runtime)
runtime->GetIRPasses(custom_passes);
}
}
if (custom_passes.EarlyPasses)
{
if (log)
log->Printf("%s - Running Early IR Passes from LanguageRuntime on expression module '%s'", __FUNCTION__,
m_expr.FunctionName());
custom_passes.EarlyPasses->run(*llvm_module_ap);
}
execution_unit_sp.reset(new IRExecutionUnit (m_llvm_context, // handed off here
llvm_module_ap, // handed off here
function_name,
exe_ctx.GetTargetSP(),
sc,
m_compiler->getTargetOpts().Features));
ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());
ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap(); // result can be NULL
if (decl_map)
{
Stream *error_stream = NULL;
Target *target = exe_ctx.GetTargetPtr();
if (target)
error_stream = target->GetDebugger().GetErrorFile().get();
IRForTarget ir_for_target(decl_map, m_expr.NeedsVariableResolution(), *execution_unit_sp, error_stream,
function_name.AsCString());
bool ir_can_run = ir_for_target.runOnModule(*execution_unit_sp->GetModule());
Process *process = exe_ctx.GetProcessPtr();
if (execution_policy != eExecutionPolicyAlways && execution_policy != eExecutionPolicyTopLevel)
{
lldb_private::Error interpret_error;
bool interpret_function_calls = !process ? false : process->CanInterpretFunctionCalls();
can_interpret =
IRInterpreter::CanInterpret(*execution_unit_sp->GetModule(), *execution_unit_sp->GetFunction(),
interpret_error, interpret_function_calls);
if (!can_interpret && execution_policy == eExecutionPolicyNever)
{
err.SetErrorStringWithFormat("Can't run the expression locally: %s", interpret_error.AsCString());
return err;
}
}
if (!ir_can_run)
{
err.SetErrorString("The expression could not be prepared to run in the target");
return err;
}
if (!process && execution_policy == eExecutionPolicyAlways)
{
err.SetErrorString("Expression needed to run in the target, but the target can't be run");
return err;
}
if (!process && execution_policy == eExecutionPolicyTopLevel)
{
err.SetErrorString(
"Top-level code needs to be inserted into a runnable target, but the target can't be run");
return err;
}
if (execution_policy == eExecutionPolicyAlways ||
(execution_policy != eExecutionPolicyTopLevel && !can_interpret))
{
if (m_expr.NeedsValidation() && process)
{
if (!process->GetDynamicCheckers())
{
DynamicCheckerFunctions *dynamic_checkers = new DynamicCheckerFunctions();
DiagnosticManager install_diagnostics;
if (!dynamic_checkers->Install(install_diagnostics, exe_ctx))
{
if (install_diagnostics.Diagnostics().size())
err.SetErrorString("couldn't install checkers, unknown error");
else
err.SetErrorString(install_diagnostics.GetString().c_str());
return err;
}
process->SetDynamicCheckers(dynamic_checkers);
if (log)
log->Printf("== [ClangUserExpression::Evaluate] Finished installing dynamic checkers ==");
}
IRDynamicChecks ir_dynamic_checks(*process->GetDynamicCheckers(), function_name.AsCString());
llvm::Module *module = execution_unit_sp->GetModule();
if (!module || !ir_dynamic_checks.runOnModule(*module))
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't add dynamic checks to the expression");
return err;
}
if (custom_passes.LatePasses)
{
if (log)
log->Printf("%s - Running Late IR Passes from LanguageRuntime on expression module '%s'",
__FUNCTION__, m_expr.FunctionName());
custom_passes.LatePasses->run(*module);
}
}
}
if (execution_policy == eExecutionPolicyAlways || execution_policy == eExecutionPolicyTopLevel ||
!can_interpret)
{
execution_unit_sp->GetRunnableInfo(err, func_addr, func_end);
}
}
else
{
execution_unit_sp->GetRunnableInfo(err, func_addr, func_end);
}
return err;
}