diff options
Diffstat (limited to 'source/Expression/UserExpression.cpp')
| -rw-r--r-- | source/Expression/UserExpression.cpp | 632 |
1 files changed, 300 insertions, 332 deletions
diff --git a/source/Expression/UserExpression.cpp b/source/Expression/UserExpression.cpp index 3e2e07e9cb22..041caf57bd31 100644 --- a/source/Expression/UserExpression.cpp +++ b/source/Expression/UserExpression.cpp @@ -9,12 +9,12 @@ #include <stdio.h> #if HAVE_SYS_TYPES_H -# include <sys/types.h> +#include <sys/types.h> #endif #include <cstdlib> -#include <string> #include <map> +#include <string> #include "Plugins/ExpressionParser/Clang/ClangPersistentVariables.h" #include "lldb/Core/ConstString.h" @@ -46,359 +46,329 @@ using namespace lldb_private; -UserExpression::UserExpression (ExecutionContextScope &exe_scope, - const char *expr, - const char *expr_prefix, - lldb::LanguageType language, - ResultType desired_type, - const EvaluateExpressionOptions &options) : - Expression(exe_scope), - m_expr_text(expr), - m_expr_prefix(expr_prefix ? expr_prefix : ""), - m_language(language), - m_desired_type(desired_type), - m_options (options) -{ -} - -UserExpression::~UserExpression () -{ -} - -void -UserExpression::InstallContext (ExecutionContext &exe_ctx) -{ - m_jit_process_wp = exe_ctx.GetProcessSP(); +UserExpression::UserExpression(ExecutionContextScope &exe_scope, + llvm::StringRef expr, llvm::StringRef prefix, + lldb::LanguageType language, + ResultType desired_type, + const EvaluateExpressionOptions &options) + : Expression(exe_scope), m_expr_text(expr), m_expr_prefix(prefix), + m_language(language), m_desired_type(desired_type), m_options(options) {} - lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP(); +UserExpression::~UserExpression() {} - if (frame_sp) - m_address = frame_sp->GetFrameCodeAddress(); -} +void UserExpression::InstallContext(ExecutionContext &exe_ctx) { + m_jit_process_wp = exe_ctx.GetProcessSP(); -bool -UserExpression::LockAndCheckContext (ExecutionContext &exe_ctx, - lldb::TargetSP &target_sp, - lldb::ProcessSP &process_sp, - lldb::StackFrameSP &frame_sp) -{ - lldb::ProcessSP expected_process_sp = m_jit_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())); - } + lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP(); - return true; + if (frame_sp) + m_address = frame_sp->GetFrameCodeAddress(); } -bool -UserExpression::MatchesContext (ExecutionContext &exe_ctx) -{ - lldb::TargetSP target_sp; - lldb::ProcessSP process_sp; - lldb::StackFrameSP frame_sp; +bool UserExpression::LockAndCheckContext(ExecutionContext &exe_ctx, + lldb::TargetSP &target_sp, + lldb::ProcessSP &process_sp, + lldb::StackFrameSP &frame_sp) { + lldb::ProcessSP expected_process_sp = m_jit_process_wp.lock(); + process_sp = exe_ctx.GetProcessSP(); - return LockAndCheckContext(exe_ctx, target_sp, process_sp, frame_sp); -} + if (process_sp != expected_process_sp) + return false; -lldb::addr_t -UserExpression::GetObjectPointer (lldb::StackFrameSP frame_sp, - ConstString &object_name, - Error &err) -{ - err.Clear(); + process_sp = exe_ctx.GetProcessSP(); + target_sp = exe_ctx.GetTargetSP(); + frame_sp = exe_ctx.GetFrameSP(); + if (m_address.IsValid()) { if (!frame_sp) - { - err.SetErrorStringWithFormat("Couldn't load '%s' because the context is incomplete", object_name.AsCString()); - return LLDB_INVALID_ADDRESS; - } - - lldb::VariableSP var_sp; - lldb::ValueObjectSP valobj_sp; - - valobj_sp = frame_sp->GetValueForVariableExpressionPath(object_name.AsCString(), - lldb::eNoDynamicValues, - StackFrame::eExpressionPathOptionCheckPtrVsMember | - StackFrame::eExpressionPathOptionsNoFragileObjcIvar | - StackFrame::eExpressionPathOptionsNoSyntheticChildren | - StackFrame::eExpressionPathOptionsNoSyntheticArrayRange, - var_sp, - err); + return false; + else + return (0 == Address::CompareLoadAddress(m_address, + frame_sp->GetFrameCodeAddress(), + target_sp.get())); + } - if (!err.Success() || !valobj_sp.get()) - return LLDB_INVALID_ADDRESS; + return true; +} - lldb::addr_t ret = valobj_sp->GetValueAsUnsigned(LLDB_INVALID_ADDRESS); +bool UserExpression::MatchesContext(ExecutionContext &exe_ctx) { + lldb::TargetSP target_sp; + lldb::ProcessSP process_sp; + lldb::StackFrameSP frame_sp; - if (ret == LLDB_INVALID_ADDRESS) - { - err.SetErrorStringWithFormat("Couldn't load '%s' because its value couldn't be evaluated", object_name.AsCString()); - return LLDB_INVALID_ADDRESS; - } + return LockAndCheckContext(exe_ctx, target_sp, process_sp, frame_sp); +} - return ret; +lldb::addr_t UserExpression::GetObjectPointer(lldb::StackFrameSP frame_sp, + ConstString &object_name, + Error &err) { + err.Clear(); + + if (!frame_sp) { + err.SetErrorStringWithFormat( + "Couldn't load '%s' because the context is incomplete", + object_name.AsCString()); + return LLDB_INVALID_ADDRESS; + } + + lldb::VariableSP var_sp; + lldb::ValueObjectSP valobj_sp; + + valobj_sp = frame_sp->GetValueForVariableExpressionPath( + object_name.AsCString(), lldb::eNoDynamicValues, + StackFrame::eExpressionPathOptionCheckPtrVsMember | + StackFrame::eExpressionPathOptionsNoFragileObjcIvar | + StackFrame::eExpressionPathOptionsNoSyntheticChildren | + StackFrame::eExpressionPathOptionsNoSyntheticArrayRange, + var_sp, err); + + if (!err.Success() || !valobj_sp.get()) + return LLDB_INVALID_ADDRESS; + + lldb::addr_t ret = valobj_sp->GetValueAsUnsigned(LLDB_INVALID_ADDRESS); + + if (ret == LLDB_INVALID_ADDRESS) { + err.SetErrorStringWithFormat( + "Couldn't load '%s' because its value couldn't be evaluated", + object_name.AsCString()); + return LLDB_INVALID_ADDRESS; + } + + return ret; } -lldb::ExpressionResults -UserExpression::Evaluate (ExecutionContext &exe_ctx, - const EvaluateExpressionOptions& options, - const char *expr_cstr, - const char *expr_prefix, - lldb::ValueObjectSP &result_valobj_sp, - Error &error, - uint32_t line_offset, - std::string *fixed_expression, - lldb::ModuleSP *jit_module_sp_ptr) -{ - Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP)); - - lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy(); - lldb::LanguageType language = options.GetLanguage(); - const ResultType desired_type = options.DoesCoerceToId() ? UserExpression::eResultTypeId : UserExpression::eResultTypeAny; - lldb::ExpressionResults execution_results = lldb::eExpressionSetupError; - - Target *target = exe_ctx.GetTargetPtr(); - if (!target) - { - if (log) - log->Printf("== [UserExpression::Evaluate] Passed a NULL target, can't run expressions."); - return lldb::eExpressionSetupError; - } +lldb::ExpressionResults UserExpression::Evaluate( + ExecutionContext &exe_ctx, const EvaluateExpressionOptions &options, + llvm::StringRef expr, llvm::StringRef prefix, + lldb::ValueObjectSP &result_valobj_sp, Error &error, uint32_t line_offset, + std::string *fixed_expression, lldb::ModuleSP *jit_module_sp_ptr) { + Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EXPRESSIONS | + LIBLLDB_LOG_STEP)); + + lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy(); + lldb::LanguageType language = options.GetLanguage(); + const ResultType desired_type = options.DoesCoerceToId() + ? UserExpression::eResultTypeId + : UserExpression::eResultTypeAny; + lldb::ExpressionResults execution_results = lldb::eExpressionSetupError; + + Target *target = exe_ctx.GetTargetPtr(); + if (!target) { + if (log) + log->Printf("== [UserExpression::Evaluate] Passed a NULL target, can't " + "run expressions."); + error.SetErrorString("expression passed a null target"); + return lldb::eExpressionSetupError; + } - Process *process = exe_ctx.GetProcessPtr(); + Process *process = exe_ctx.GetProcessPtr(); - if (process == NULL || process->GetState() != lldb::eStateStopped) - { - if (execution_policy == eExecutionPolicyAlways) - { - if (log) - log->Printf("== [UserExpression::Evaluate] Expression may not run, but is not constant =="); + if (process == NULL || process->GetState() != lldb::eStateStopped) { + if (execution_policy == eExecutionPolicyAlways) { + if (log) + log->Printf("== [UserExpression::Evaluate] Expression may not run, but " + "is not constant =="); - error.SetErrorString ("expression needed to run but couldn't"); + error.SetErrorString("expression needed to run but couldn't"); - return execution_results; - } + return execution_results; } - - if (process == NULL || !process->CanJIT()) - execution_policy = eExecutionPolicyNever; - - // We need to set the expression execution thread here, turns out parse can call functions in the process of - // looking up symbols, which will escape the context set by exe_ctx passed to Execute. - lldb::ThreadSP thread_sp = exe_ctx.GetThreadSP(); - ThreadList::ExpressionExecutionThreadPusher execution_thread_pusher(thread_sp); - - const char *full_prefix = NULL; - const char *option_prefix = options.GetPrefix(); - std::string full_prefix_storage; - if (expr_prefix && option_prefix) - { - full_prefix_storage.assign(expr_prefix); - full_prefix_storage.append(option_prefix); - if (!full_prefix_storage.empty()) - full_prefix = full_prefix_storage.c_str(); - } - else if (expr_prefix) - full_prefix = expr_prefix; - else - full_prefix = option_prefix; - - // If the language was not specified in the expression command, - // set it to the language in the target's properties if - // specified, else default to the langage for the frame. - if (language == lldb::eLanguageTypeUnknown) - { - if (target->GetLanguage() != lldb::eLanguageTypeUnknown) - language = target->GetLanguage(); - else if (StackFrame *frame = exe_ctx.GetFramePtr()) - language = frame->GetLanguage(); + } + + if (process == NULL || !process->CanJIT()) + execution_policy = eExecutionPolicyNever; + + // We need to set the expression execution thread here, turns out parse can + // call functions in the process of + // looking up symbols, which will escape the context set by exe_ctx passed to + // Execute. + lldb::ThreadSP thread_sp = exe_ctx.GetThreadSP(); + ThreadList::ExpressionExecutionThreadPusher execution_thread_pusher( + thread_sp); + + llvm::StringRef full_prefix; + llvm::StringRef option_prefix(options.GetPrefix()); + std::string full_prefix_storage; + if (!prefix.empty() && !option_prefix.empty()) { + full_prefix_storage = prefix; + full_prefix_storage.append(option_prefix); + full_prefix = full_prefix_storage; + } else if (!prefix.empty()) + full_prefix = prefix; + else + full_prefix = option_prefix; + + // If the language was not specified in the expression command, + // set it to the language in the target's properties if + // specified, else default to the langage for the frame. + if (language == lldb::eLanguageTypeUnknown) { + if (target->GetLanguage() != lldb::eLanguageTypeUnknown) + language = target->GetLanguage(); + else if (StackFrame *frame = exe_ctx.GetFramePtr()) + language = frame->GetLanguage(); + } + + lldb::UserExpressionSP user_expression_sp( + target->GetUserExpressionForLanguage(expr, full_prefix, language, + desired_type, options, error)); + if (error.Fail()) { + if (log) + log->Printf("== [UserExpression::Evaluate] Getting expression: %s ==", + error.AsCString()); + return lldb::eExpressionSetupError; + } + + if (log) + log->Printf("== [UserExpression::Evaluate] Parsing expression %s ==", + expr.str().c_str()); + + const bool keep_expression_in_memory = true; + const bool generate_debug_info = options.GetGenerateDebugInfo(); + + if (options.InvokeCancelCallback(lldb::eExpressionEvaluationParse)) { + error.SetErrorString("expression interrupted by callback before parse"); + result_valobj_sp = ValueObjectConstResult::Create( + exe_ctx.GetBestExecutionContextScope(), error); + return lldb::eExpressionInterrupted; + } + + DiagnosticManager diagnostic_manager; + + bool parse_success = + user_expression_sp->Parse(diagnostic_manager, exe_ctx, execution_policy, + keep_expression_in_memory, generate_debug_info); + + // Calculate the fixed expression always, since we need it for errors. + std::string tmp_fixed_expression; + if (fixed_expression == nullptr) + fixed_expression = &tmp_fixed_expression; + + const char *fixed_text = user_expression_sp->GetFixedText(); + if (fixed_text != nullptr) + fixed_expression->append(fixed_text); + + // If there is a fixed expression, try to parse it: + if (!parse_success) { + execution_results = lldb::eExpressionParseError; + if (fixed_expression && !fixed_expression->empty() && + options.GetAutoApplyFixIts()) { + lldb::UserExpressionSP fixed_expression_sp( + target->GetUserExpressionForLanguage(fixed_expression->c_str(), + full_prefix, language, + desired_type, options, error)); + DiagnosticManager fixed_diagnostic_manager; + parse_success = fixed_expression_sp->Parse( + fixed_diagnostic_manager, exe_ctx, execution_policy, + keep_expression_in_memory, generate_debug_info); + if (parse_success) { + diagnostic_manager.Clear(); + user_expression_sp = fixed_expression_sp; + } else { + // If the fixed expression failed to parse, don't tell the user about, + // that won't help. + fixed_expression->clear(); + } } - lldb::UserExpressionSP user_expression_sp(target->GetUserExpressionForLanguage (expr_cstr, - full_prefix, - language, - desired_type, - options, - error)); - if (error.Fail()) - { - if (log) - log->Printf ("== [UserExpression::Evaluate] Getting expression: %s ==", error.AsCString()); - return lldb::eExpressionSetupError; + if (!parse_success) { + if (!fixed_expression->empty() && target->GetEnableNotifyAboutFixIts()) { + error.SetExpressionErrorWithFormat( + execution_results, + "expression failed to parse, fixed expression suggested:\n %s", + fixed_expression->c_str()); + } else { + if (!diagnostic_manager.Diagnostics().size()) + error.SetExpressionError(execution_results, + "expression failed to parse, unknown error"); + else + error.SetExpressionError(execution_results, + diagnostic_manager.GetString().c_str()); + } } + } + + if (parse_success) { + // If a pointer to a lldb::ModuleSP was passed in, return the JIT'ed module + // if one was created + if (jit_module_sp_ptr) + *jit_module_sp_ptr = user_expression_sp->GetJITModule(); + + lldb::ExpressionVariableSP expr_result; + + if (execution_policy == eExecutionPolicyNever && + !user_expression_sp->CanInterpret()) { + if (log) + log->Printf("== [UserExpression::Evaluate] Expression may not run, but " + "is not constant =="); + + if (!diagnostic_manager.Diagnostics().size()) + error.SetExpressionError(lldb::eExpressionSetupError, + "expression needed to run but couldn't"); + } else if (execution_policy == eExecutionPolicyTopLevel) { + error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric); + return lldb::eExpressionCompleted; + } else { + if (options.InvokeCancelCallback(lldb::eExpressionEvaluationExecution)) { + error.SetExpressionError( + lldb::eExpressionInterrupted, + "expression interrupted by callback before execution"); + result_valobj_sp = ValueObjectConstResult::Create( + exe_ctx.GetBestExecutionContextScope(), error); + return lldb::eExpressionInterrupted; + } - if (log) - log->Printf("== [UserExpression::Evaluate] Parsing expression %s ==", expr_cstr); + diagnostic_manager.Clear(); - const bool keep_expression_in_memory = true; - const bool generate_debug_info = options.GetGenerateDebugInfo(); + if (log) + log->Printf("== [UserExpression::Evaluate] Executing expression =="); - if (options.InvokeCancelCallback (lldb::eExpressionEvaluationParse)) - { - error.SetErrorString ("expression interrupted by callback before parse"); - result_valobj_sp = ValueObjectConstResult::Create(exe_ctx.GetBestExecutionContextScope(), error); - return lldb::eExpressionInterrupted; - } + execution_results = + user_expression_sp->Execute(diagnostic_manager, exe_ctx, options, + user_expression_sp, expr_result); - DiagnosticManager diagnostic_manager; - - bool parse_success = user_expression_sp->Parse(diagnostic_manager, - exe_ctx, - execution_policy, - keep_expression_in_memory, - generate_debug_info); - - // Calculate the fixed expression always, since we need it for errors. - std::string tmp_fixed_expression; - if (fixed_expression == nullptr) - fixed_expression = &tmp_fixed_expression; - - const char *fixed_text = user_expression_sp->GetFixedText(); - if (fixed_text != nullptr) - fixed_expression->append(fixed_text); - - // If there is a fixed expression, try to parse it: - if (!parse_success) - { - execution_results = lldb::eExpressionParseError; - if (fixed_expression && !fixed_expression->empty() && options.GetAutoApplyFixIts()) - { - lldb::UserExpressionSP fixed_expression_sp(target->GetUserExpressionForLanguage (fixed_expression->c_str(), - full_prefix, - language, - desired_type, - options, - error)); - DiagnosticManager fixed_diagnostic_manager; - parse_success = fixed_expression_sp->Parse(fixed_diagnostic_manager, - exe_ctx, - execution_policy, - keep_expression_in_memory, - generate_debug_info); - if (parse_success) - { - diagnostic_manager.Clear(); - user_expression_sp = fixed_expression_sp; - } - else - { - // If the fixed expression failed to parse, don't tell the user about, that won't help. - fixed_expression->clear(); - } - } - - if (!parse_success) - { - if (!fixed_expression->empty() && target->GetEnableNotifyAboutFixIts()) - { - error.SetExpressionErrorWithFormat(execution_results, "expression failed to parse, fixed expression suggested:\n %s", - fixed_expression->c_str()); - } - else - { - if (!diagnostic_manager.Diagnostics().size()) - error.SetExpressionError(execution_results, "expression failed to parse, unknown error"); - else - error.SetExpressionError(execution_results, diagnostic_manager.GetString().c_str()); - } - } - } - - if (parse_success) - { - // If a pointer to a lldb::ModuleSP was passed in, return the JIT'ed module if one was created - if (jit_module_sp_ptr) - *jit_module_sp_ptr = user_expression_sp->GetJITModule(); - - lldb::ExpressionVariableSP expr_result; - - if (execution_policy == eExecutionPolicyNever && - !user_expression_sp->CanInterpret()) - { - if (log) - log->Printf("== [UserExpression::Evaluate] Expression may not run, but is not constant =="); - - if (!diagnostic_manager.Diagnostics().size()) - error.SetExpressionError(lldb::eExpressionSetupError, "expression needed to run but couldn't"); - } - else if (execution_policy == eExecutionPolicyTopLevel) - { - error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric); - return lldb::eExpressionCompleted; - } + if (execution_results != lldb::eExpressionCompleted) { + if (log) + log->Printf("== [UserExpression::Evaluate] Execution completed " + "abnormally =="); + + if (!diagnostic_manager.Diagnostics().size()) + error.SetExpressionError( + execution_results, "expression failed to execute, unknown error"); else - { - if (options.InvokeCancelCallback (lldb::eExpressionEvaluationExecution)) - { - error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback before execution"); - result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error); - return lldb::eExpressionInterrupted; - } - - diagnostic_manager.Clear(); - - if (log) - log->Printf("== [UserExpression::Evaluate] Executing expression =="); - - execution_results = - user_expression_sp->Execute(diagnostic_manager, exe_ctx, options, user_expression_sp, expr_result); - - if (execution_results != lldb::eExpressionCompleted) - { - if (log) - log->Printf("== [UserExpression::Evaluate] Execution completed abnormally =="); - - if (!diagnostic_manager.Diagnostics().size()) - error.SetExpressionError(execution_results, "expression failed to execute, unknown error"); - else - error.SetExpressionError(execution_results, diagnostic_manager.GetString().c_str()); - } - else - { - if (expr_result) - { - result_valobj_sp = expr_result->GetValueObject(); - - if (log) - log->Printf("== [UserExpression::Evaluate] Execution completed normally with result %s ==", - result_valobj_sp->GetValueAsCString()); - } - else - { - if (log) - log->Printf("== [UserExpression::Evaluate] Execution completed normally with no result =="); - - error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric); - } - } + error.SetExpressionError(execution_results, + diagnostic_manager.GetString().c_str()); + } else { + if (expr_result) { + result_valobj_sp = expr_result->GetValueObject(); + + if (log) + log->Printf("== [UserExpression::Evaluate] Execution completed " + "normally with result %s ==", + result_valobj_sp->GetValueAsCString()); + } else { + if (log) + log->Printf("== [UserExpression::Evaluate] Execution completed " + "normally with no result =="); + + error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric); } + } } + } - if (options.InvokeCancelCallback(lldb::eExpressionEvaluationComplete)) - { - error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback after complete"); - return lldb::eExpressionInterrupted; - } + if (options.InvokeCancelCallback(lldb::eExpressionEvaluationComplete)) { + error.SetExpressionError( + lldb::eExpressionInterrupted, + "expression interrupted by callback after complete"); + return lldb::eExpressionInterrupted; + } - if (result_valobj_sp.get() == NULL) - { - result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error); - } + if (result_valobj_sp.get() == NULL) { + result_valobj_sp = ValueObjectConstResult::Create( + exe_ctx.GetBestExecutionContextScope(), error); + } - return execution_results; + return execution_results; } lldb::ExpressionResults @@ -406,15 +376,13 @@ UserExpression::Execute(DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx, const EvaluateExpressionOptions &options, lldb::UserExpressionSP &shared_ptr_to_me, - lldb::ExpressionVariableSP &result_var) -{ - lldb::ExpressionResults expr_result = DoExecute(diagnostic_manager, exe_ctx, options, shared_ptr_to_me, result_var); - Target *target = exe_ctx.GetTargetPtr(); - if (options.GetResultIsInternal() && result_var && target) - { - target->GetPersistentExpressionStateForLanguage(m_language)->RemovePersistentVariable (result_var); - } - return expr_result; + lldb::ExpressionVariableSP &result_var) { + lldb::ExpressionResults expr_result = DoExecute( + diagnostic_manager, exe_ctx, options, shared_ptr_to_me, result_var); + Target *target = exe_ctx.GetTargetPtr(); + if (options.GetResultIsInternal() && result_var && target) { + target->GetPersistentExpressionStateForLanguage(m_language) + ->RemovePersistentVariable(result_var); + } + return expr_result; } - - |