1 //===-- IOHandler.cpp -----------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "lldb/Core/IOHandler.h"
10
11 #if defined(__APPLE__)
12 #include <deque>
13 #endif
14 #include <string>
15
16 #include "lldb/Core/Debugger.h"
17 #include "lldb/Host/Config.h"
18 #include "lldb/Host/File.h"
19 #include "lldb/Host/StreamFile.h"
20 #include "lldb/Utility/AnsiTerminal.h"
21 #include "lldb/Utility/Predicate.h"
22 #include "lldb/Utility/Status.h"
23 #include "lldb/Utility/StreamString.h"
24 #include "lldb/Utility/StringList.h"
25 #include "lldb/lldb-forward.h"
26
27 #if LLDB_ENABLE_LIBEDIT
28 #include "lldb/Host/Editline.h"
29 #endif
30 #include "lldb/Interpreter/CommandCompletions.h"
31 #include "lldb/Interpreter/CommandInterpreter.h"
32 #include "llvm/ADT/StringRef.h"
33
34 #ifdef _WIN32
35 #include "lldb/Host/windows/windows.h"
36 #endif
37
38 #include <memory>
39 #include <mutex>
40 #include <optional>
41
42 #include <cassert>
43 #include <cctype>
44 #include <cerrno>
45 #include <clocale>
46 #include <cstdint>
47 #include <cstdio>
48 #include <cstring>
49 #include <type_traits>
50
51 using namespace lldb;
52 using namespace lldb_private;
53 using llvm::StringRef;
54
IOHandler(Debugger & debugger,IOHandler::Type type)55 IOHandler::IOHandler(Debugger &debugger, IOHandler::Type type)
56 : IOHandler(debugger, type,
57 FileSP(), // Adopt STDIN from top input reader
58 StreamFileSP(), // Adopt STDOUT from top input reader
59 StreamFileSP(), // Adopt STDERR from top input reader
60 0 // Flags
61
62 ) {}
63
IOHandler(Debugger & debugger,IOHandler::Type type,const lldb::FileSP & input_sp,const lldb::StreamFileSP & output_sp,const lldb::StreamFileSP & error_sp,uint32_t flags)64 IOHandler::IOHandler(Debugger &debugger, IOHandler::Type type,
65 const lldb::FileSP &input_sp,
66 const lldb::StreamFileSP &output_sp,
67 const lldb::StreamFileSP &error_sp, uint32_t flags)
68 : m_debugger(debugger), m_input_sp(input_sp), m_output_sp(output_sp),
69 m_error_sp(error_sp), m_popped(false), m_flags(flags), m_type(type),
70 m_user_data(nullptr), m_done(false), m_active(false) {
71 // If any files are not specified, then adopt them from the top input reader.
72 if (!m_input_sp || !m_output_sp || !m_error_sp)
73 debugger.AdoptTopIOHandlerFilesIfInvalid(m_input_sp, m_output_sp,
74 m_error_sp);
75 }
76
77 IOHandler::~IOHandler() = default;
78
GetInputFD()79 int IOHandler::GetInputFD() {
80 return (m_input_sp ? m_input_sp->GetDescriptor() : -1);
81 }
82
GetOutputFD()83 int IOHandler::GetOutputFD() {
84 return (m_output_sp ? m_output_sp->GetFile().GetDescriptor() : -1);
85 }
86
GetErrorFD()87 int IOHandler::GetErrorFD() {
88 return (m_error_sp ? m_error_sp->GetFile().GetDescriptor() : -1);
89 }
90
GetInputFILE()91 FILE *IOHandler::GetInputFILE() {
92 return (m_input_sp ? m_input_sp->GetStream() : nullptr);
93 }
94
GetOutputFILE()95 FILE *IOHandler::GetOutputFILE() {
96 return (m_output_sp ? m_output_sp->GetFile().GetStream() : nullptr);
97 }
98
GetErrorFILE()99 FILE *IOHandler::GetErrorFILE() {
100 return (m_error_sp ? m_error_sp->GetFile().GetStream() : nullptr);
101 }
102
GetInputFileSP()103 FileSP IOHandler::GetInputFileSP() { return m_input_sp; }
104
GetOutputStreamFileSP()105 StreamFileSP IOHandler::GetOutputStreamFileSP() { return m_output_sp; }
106
GetErrorStreamFileSP()107 StreamFileSP IOHandler::GetErrorStreamFileSP() { return m_error_sp; }
108
GetIsInteractive()109 bool IOHandler::GetIsInteractive() {
110 return GetInputFileSP() ? GetInputFileSP()->GetIsInteractive() : false;
111 }
112
GetIsRealTerminal()113 bool IOHandler::GetIsRealTerminal() {
114 return GetInputFileSP() ? GetInputFileSP()->GetIsRealTerminal() : false;
115 }
116
SetPopped(bool b)117 void IOHandler::SetPopped(bool b) { m_popped.SetValue(b, eBroadcastOnChange); }
118
WaitForPop()119 void IOHandler::WaitForPop() { m_popped.WaitForValueEqualTo(true); }
120
PrintAsync(const char * s,size_t len,bool is_stdout)121 void IOHandler::PrintAsync(const char *s, size_t len, bool is_stdout) {
122 std::lock_guard<std::recursive_mutex> guard(m_output_mutex);
123 lldb::StreamFileSP stream = is_stdout ? m_output_sp : m_error_sp;
124 stream->Write(s, len);
125 stream->Flush();
126 }
127
PrintAsync(const char * s,size_t len,bool is_stdout)128 bool IOHandlerStack::PrintAsync(const char *s, size_t len, bool is_stdout) {
129 std::lock_guard<std::recursive_mutex> guard(m_mutex);
130 if (!m_top)
131 return false;
132 m_top->PrintAsync(s, len, is_stdout);
133 return true;
134 }
135
IOHandlerConfirm(Debugger & debugger,llvm::StringRef prompt,bool default_response)136 IOHandlerConfirm::IOHandlerConfirm(Debugger &debugger, llvm::StringRef prompt,
137 bool default_response)
138 : IOHandlerEditline(
139 debugger, IOHandler::Type::Confirm,
140 nullptr, // nullptr editline_name means no history loaded/saved
141 llvm::StringRef(), // No prompt
142 llvm::StringRef(), // No continuation prompt
143 false, // Multi-line
144 false, // Don't colorize the prompt (i.e. the confirm message.)
145 0, *this),
146 m_default_response(default_response), m_user_response(default_response) {
147 StreamString prompt_stream;
148 prompt_stream.PutCString(prompt);
149 if (m_default_response)
150 prompt_stream.Printf(": [Y/n] ");
151 else
152 prompt_stream.Printf(": [y/N] ");
153
154 SetPrompt(prompt_stream.GetString());
155 }
156
157 IOHandlerConfirm::~IOHandlerConfirm() = default;
158
IOHandlerComplete(IOHandler & io_handler,CompletionRequest & request)159 void IOHandlerConfirm::IOHandlerComplete(IOHandler &io_handler,
160 CompletionRequest &request) {
161 if (request.GetRawCursorPos() != 0)
162 return;
163 request.AddCompletion(m_default_response ? "y" : "n");
164 }
165
IOHandlerInputComplete(IOHandler & io_handler,std::string & line)166 void IOHandlerConfirm::IOHandlerInputComplete(IOHandler &io_handler,
167 std::string &line) {
168 if (line.empty()) {
169 // User just hit enter, set the response to the default
170 m_user_response = m_default_response;
171 io_handler.SetIsDone(true);
172 return;
173 }
174
175 if (line.size() == 1) {
176 switch (line[0]) {
177 case 'y':
178 case 'Y':
179 m_user_response = true;
180 io_handler.SetIsDone(true);
181 return;
182 case 'n':
183 case 'N':
184 m_user_response = false;
185 io_handler.SetIsDone(true);
186 return;
187 default:
188 break;
189 }
190 }
191
192 if (line == "yes" || line == "YES" || line == "Yes") {
193 m_user_response = true;
194 io_handler.SetIsDone(true);
195 } else if (line == "no" || line == "NO" || line == "No") {
196 m_user_response = false;
197 io_handler.SetIsDone(true);
198 }
199 }
200
201 std::optional<std::string>
IOHandlerSuggestion(IOHandler & io_handler,llvm::StringRef line)202 IOHandlerDelegate::IOHandlerSuggestion(IOHandler &io_handler,
203 llvm::StringRef line) {
204 return io_handler.GetDebugger()
205 .GetCommandInterpreter()
206 .GetAutoSuggestionForCommand(line);
207 }
208
IOHandlerComplete(IOHandler & io_handler,CompletionRequest & request)209 void IOHandlerDelegate::IOHandlerComplete(IOHandler &io_handler,
210 CompletionRequest &request) {
211 switch (m_completion) {
212 case Completion::None:
213 break;
214 case Completion::LLDBCommand:
215 io_handler.GetDebugger().GetCommandInterpreter().HandleCompletion(request);
216 break;
217 case Completion::Expression:
218 lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
219 io_handler.GetDebugger().GetCommandInterpreter(),
220 lldb::eVariablePathCompletion, request, nullptr);
221 break;
222 }
223 }
224
IOHandlerEditline(Debugger & debugger,IOHandler::Type type,const char * editline_name,llvm::StringRef prompt,llvm::StringRef continuation_prompt,bool multi_line,bool color,uint32_t line_number_start,IOHandlerDelegate & delegate)225 IOHandlerEditline::IOHandlerEditline(
226 Debugger &debugger, IOHandler::Type type,
227 const char *editline_name, // Used for saving history files
228 llvm::StringRef prompt, llvm::StringRef continuation_prompt,
229 bool multi_line, bool color, uint32_t line_number_start,
230 IOHandlerDelegate &delegate)
231 : IOHandlerEditline(debugger, type,
232 FileSP(), // Inherit input from top input reader
233 StreamFileSP(), // Inherit output from top input reader
234 StreamFileSP(), // Inherit error from top input reader
235 0, // Flags
236 editline_name, // Used for saving history files
237 prompt, continuation_prompt, multi_line, color,
238 line_number_start, delegate) {}
239
IOHandlerEditline(Debugger & debugger,IOHandler::Type type,const lldb::FileSP & input_sp,const lldb::StreamFileSP & output_sp,const lldb::StreamFileSP & error_sp,uint32_t flags,const char * editline_name,llvm::StringRef prompt,llvm::StringRef continuation_prompt,bool multi_line,bool color,uint32_t line_number_start,IOHandlerDelegate & delegate)240 IOHandlerEditline::IOHandlerEditline(
241 Debugger &debugger, IOHandler::Type type, const lldb::FileSP &input_sp,
242 const lldb::StreamFileSP &output_sp, const lldb::StreamFileSP &error_sp,
243 uint32_t flags,
244 const char *editline_name, // Used for saving history files
245 llvm::StringRef prompt, llvm::StringRef continuation_prompt,
246 bool multi_line, bool color, uint32_t line_number_start,
247 IOHandlerDelegate &delegate)
248 : IOHandler(debugger, type, input_sp, output_sp, error_sp, flags),
249 #if LLDB_ENABLE_LIBEDIT
250 m_editline_up(),
251 #endif
252 m_delegate(delegate), m_prompt(), m_continuation_prompt(),
253 m_current_lines_ptr(nullptr), m_base_line_number(line_number_start),
254 m_curr_line_idx(UINT32_MAX), m_multi_line(multi_line), m_color(color),
255 m_interrupt_exits(true) {
256 SetPrompt(prompt);
257
258 #if LLDB_ENABLE_LIBEDIT
259 bool use_editline = false;
260
261 use_editline = GetInputFILE() && GetOutputFILE() && GetErrorFILE() &&
262 m_input_sp && m_input_sp->GetIsRealTerminal();
263
264 if (use_editline) {
265 m_editline_up = std::make_unique<Editline>(editline_name, GetInputFILE(),
266 GetOutputFILE(), GetErrorFILE(),
267 GetOutputMutex());
268 m_editline_up->SetIsInputCompleteCallback(
269 [this](Editline *editline, StringList &lines) {
270 return this->IsInputCompleteCallback(editline, lines);
271 });
272
273 m_editline_up->SetAutoCompleteCallback([this](CompletionRequest &request) {
274 this->AutoCompleteCallback(request);
275 });
276
277 if (debugger.GetUseAutosuggestion()) {
278 m_editline_up->SetSuggestionCallback([this](llvm::StringRef line) {
279 return this->SuggestionCallback(line);
280 });
281 if (m_color) {
282 m_editline_up->SetSuggestionAnsiPrefix(ansi::FormatAnsiTerminalCodes(
283 debugger.GetAutosuggestionAnsiPrefix()));
284 m_editline_up->SetSuggestionAnsiSuffix(ansi::FormatAnsiTerminalCodes(
285 debugger.GetAutosuggestionAnsiSuffix()));
286 }
287 }
288 // See if the delegate supports fixing indentation
289 const char *indent_chars = delegate.IOHandlerGetFixIndentationCharacters();
290 if (indent_chars) {
291 // The delegate does support indentation, hook it up so when any
292 // indentation character is typed, the delegate gets a chance to fix it
293 FixIndentationCallbackType f = [this](Editline *editline,
294 const StringList &lines,
295 int cursor_position) {
296 return this->FixIndentationCallback(editline, lines, cursor_position);
297 };
298 m_editline_up->SetFixIndentationCallback(std::move(f), indent_chars);
299 }
300 }
301 #endif
302 SetBaseLineNumber(m_base_line_number);
303 SetPrompt(prompt);
304 SetContinuationPrompt(continuation_prompt);
305 }
306
~IOHandlerEditline()307 IOHandlerEditline::~IOHandlerEditline() {
308 #if LLDB_ENABLE_LIBEDIT
309 m_editline_up.reset();
310 #endif
311 }
312
Activate()313 void IOHandlerEditline::Activate() {
314 IOHandler::Activate();
315 m_delegate.IOHandlerActivated(*this, GetIsInteractive());
316 }
317
Deactivate()318 void IOHandlerEditline::Deactivate() {
319 IOHandler::Deactivate();
320 m_delegate.IOHandlerDeactivated(*this);
321 }
322
TerminalSizeChanged()323 void IOHandlerEditline::TerminalSizeChanged() {
324 #if LLDB_ENABLE_LIBEDIT
325 if (m_editline_up)
326 m_editline_up->TerminalSizeChanged();
327 #endif
328 }
329
330 // Split out a line from the buffer, if there is a full one to get.
SplitLine(std::string & line_buffer)331 static std::optional<std::string> SplitLine(std::string &line_buffer) {
332 size_t pos = line_buffer.find('\n');
333 if (pos == std::string::npos)
334 return std::nullopt;
335 std::string line =
336 std::string(StringRef(line_buffer.c_str(), pos).rtrim("\n\r"));
337 line_buffer = line_buffer.substr(pos + 1);
338 return line;
339 }
340
341 // If the final line of the file ends without a end-of-line, return
342 // it as a line anyway.
SplitLineEOF(std::string & line_buffer)343 static std::optional<std::string> SplitLineEOF(std::string &line_buffer) {
344 if (llvm::all_of(line_buffer, llvm::isSpace))
345 return std::nullopt;
346 std::string line = std::move(line_buffer);
347 line_buffer.clear();
348 return line;
349 }
350
GetLine(std::string & line,bool & interrupted)351 bool IOHandlerEditline::GetLine(std::string &line, bool &interrupted) {
352 #if LLDB_ENABLE_LIBEDIT
353 if (m_editline_up) {
354 return m_editline_up->GetLine(line, interrupted);
355 }
356 #endif
357
358 line.clear();
359
360 if (GetIsInteractive()) {
361 const char *prompt = nullptr;
362
363 if (m_multi_line && m_curr_line_idx > 0)
364 prompt = GetContinuationPrompt();
365
366 if (prompt == nullptr)
367 prompt = GetPrompt();
368
369 if (prompt && prompt[0]) {
370 if (m_output_sp) {
371 m_output_sp->Printf("%s", prompt);
372 m_output_sp->Flush();
373 }
374 }
375 }
376
377 std::optional<std::string> got_line = SplitLine(m_line_buffer);
378
379 if (!got_line && !m_input_sp) {
380 // No more input file, we are done...
381 SetIsDone(true);
382 return false;
383 }
384
385 FILE *in = GetInputFILE();
386 char buffer[256];
387
388 if (!got_line && !in && m_input_sp) {
389 // there is no FILE*, fall back on just reading bytes from the stream.
390 while (!got_line) {
391 size_t bytes_read = sizeof(buffer);
392 Status error = m_input_sp->Read((void *)buffer, bytes_read);
393 if (error.Success() && !bytes_read) {
394 got_line = SplitLineEOF(m_line_buffer);
395 break;
396 }
397 if (error.Fail())
398 break;
399 m_line_buffer += StringRef(buffer, bytes_read);
400 got_line = SplitLine(m_line_buffer);
401 }
402 }
403
404 if (!got_line && in) {
405 while (!got_line) {
406 char *r = fgets(buffer, sizeof(buffer), in);
407 #ifdef _WIN32
408 // ReadFile on Windows is supposed to set ERROR_OPERATION_ABORTED
409 // according to the docs on MSDN. However, this has evidently been a
410 // known bug since Windows 8. Therefore, we can't detect if a signal
411 // interrupted in the fgets. So pressing ctrl-c causes the repl to end
412 // and the process to exit. A temporary workaround is just to attempt to
413 // fgets twice until this bug is fixed.
414 if (r == nullptr)
415 r = fgets(buffer, sizeof(buffer), in);
416 // this is the equivalent of EINTR for Windows
417 if (r == nullptr && GetLastError() == ERROR_OPERATION_ABORTED)
418 continue;
419 #endif
420 if (r == nullptr) {
421 if (ferror(in) && errno == EINTR)
422 continue;
423 if (feof(in))
424 got_line = SplitLineEOF(m_line_buffer);
425 break;
426 }
427 m_line_buffer += buffer;
428 got_line = SplitLine(m_line_buffer);
429 }
430 }
431
432 if (got_line) {
433 line = *got_line;
434 }
435
436 return (bool)got_line;
437 }
438
439 #if LLDB_ENABLE_LIBEDIT
IsInputCompleteCallback(Editline * editline,StringList & lines)440 bool IOHandlerEditline::IsInputCompleteCallback(Editline *editline,
441 StringList &lines) {
442 return m_delegate.IOHandlerIsInputComplete(*this, lines);
443 }
444
FixIndentationCallback(Editline * editline,const StringList & lines,int cursor_position)445 int IOHandlerEditline::FixIndentationCallback(Editline *editline,
446 const StringList &lines,
447 int cursor_position) {
448 return m_delegate.IOHandlerFixIndentation(*this, lines, cursor_position);
449 }
450
451 std::optional<std::string>
SuggestionCallback(llvm::StringRef line)452 IOHandlerEditline::SuggestionCallback(llvm::StringRef line) {
453 return m_delegate.IOHandlerSuggestion(*this, line);
454 }
455
AutoCompleteCallback(CompletionRequest & request)456 void IOHandlerEditline::AutoCompleteCallback(CompletionRequest &request) {
457 m_delegate.IOHandlerComplete(*this, request);
458 }
459 #endif
460
GetPrompt()461 const char *IOHandlerEditline::GetPrompt() {
462 #if LLDB_ENABLE_LIBEDIT
463 if (m_editline_up) {
464 return m_editline_up->GetPrompt();
465 } else {
466 #endif
467 if (m_prompt.empty())
468 return nullptr;
469 #if LLDB_ENABLE_LIBEDIT
470 }
471 #endif
472 return m_prompt.c_str();
473 }
474
SetPrompt(llvm::StringRef prompt)475 bool IOHandlerEditline::SetPrompt(llvm::StringRef prompt) {
476 m_prompt = std::string(prompt);
477
478 #if LLDB_ENABLE_LIBEDIT
479 if (m_editline_up) {
480 m_editline_up->SetPrompt(m_prompt.empty() ? nullptr : m_prompt.c_str());
481 if (m_color) {
482 m_editline_up->SetPromptAnsiPrefix(
483 ansi::FormatAnsiTerminalCodes(m_debugger.GetPromptAnsiPrefix()));
484 m_editline_up->SetPromptAnsiSuffix(
485 ansi::FormatAnsiTerminalCodes(m_debugger.GetPromptAnsiSuffix()));
486 }
487 }
488 #endif
489 return true;
490 }
491
GetContinuationPrompt()492 const char *IOHandlerEditline::GetContinuationPrompt() {
493 return (m_continuation_prompt.empty() ? nullptr
494 : m_continuation_prompt.c_str());
495 }
496
SetContinuationPrompt(llvm::StringRef prompt)497 void IOHandlerEditline::SetContinuationPrompt(llvm::StringRef prompt) {
498 m_continuation_prompt = std::string(prompt);
499
500 #if LLDB_ENABLE_LIBEDIT
501 if (m_editline_up)
502 m_editline_up->SetContinuationPrompt(m_continuation_prompt.empty()
503 ? nullptr
504 : m_continuation_prompt.c_str());
505 #endif
506 }
507
SetBaseLineNumber(uint32_t line)508 void IOHandlerEditline::SetBaseLineNumber(uint32_t line) {
509 m_base_line_number = line;
510 }
511
GetCurrentLineIndex() const512 uint32_t IOHandlerEditline::GetCurrentLineIndex() const {
513 #if LLDB_ENABLE_LIBEDIT
514 if (m_editline_up)
515 return m_editline_up->GetCurrentLine();
516 #endif
517 return m_curr_line_idx;
518 }
519
GetCurrentLines() const520 StringList IOHandlerEditline::GetCurrentLines() const {
521 #if LLDB_ENABLE_LIBEDIT
522 if (m_editline_up)
523 return m_editline_up->GetInputAsStringList();
524 #endif
525 // When libedit is not used, the current lines can be gotten from
526 // `m_current_lines_ptr`, which is updated whenever a new line is processed.
527 // This doesn't happen when libedit is used, in which case
528 // `m_current_lines_ptr` is only updated when the full input is terminated.
529
530 if (m_current_lines_ptr)
531 return *m_current_lines_ptr;
532 return StringList();
533 }
534
GetLines(StringList & lines,bool & interrupted)535 bool IOHandlerEditline::GetLines(StringList &lines, bool &interrupted) {
536 m_current_lines_ptr = &lines;
537
538 bool success = false;
539 #if LLDB_ENABLE_LIBEDIT
540 if (m_editline_up) {
541 return m_editline_up->GetLines(m_base_line_number, lines, interrupted);
542 } else {
543 #endif
544 bool done = false;
545 Status error;
546
547 while (!done) {
548 // Show line numbers if we are asked to
549 std::string line;
550 if (m_base_line_number > 0 && GetIsInteractive()) {
551 if (m_output_sp) {
552 m_output_sp->Printf("%u%s",
553 m_base_line_number + (uint32_t)lines.GetSize(),
554 GetPrompt() == nullptr ? " " : "");
555 }
556 }
557
558 m_curr_line_idx = lines.GetSize();
559
560 bool interrupted = false;
561 if (GetLine(line, interrupted) && !interrupted) {
562 lines.AppendString(line);
563 done = m_delegate.IOHandlerIsInputComplete(*this, lines);
564 } else {
565 done = true;
566 }
567 }
568 success = lines.GetSize() > 0;
569 #if LLDB_ENABLE_LIBEDIT
570 }
571 #endif
572 return success;
573 }
574
575 // Each IOHandler gets to run until it is done. It should read data from the
576 // "in" and place output into "out" and "err and return when done.
Run()577 void IOHandlerEditline::Run() {
578 std::string line;
579 while (IsActive()) {
580 bool interrupted = false;
581 if (m_multi_line) {
582 StringList lines;
583 if (GetLines(lines, interrupted)) {
584 if (interrupted) {
585 m_done = m_interrupt_exits;
586 m_delegate.IOHandlerInputInterrupted(*this, line);
587
588 } else {
589 line = lines.CopyList();
590 m_delegate.IOHandlerInputComplete(*this, line);
591 }
592 } else {
593 m_done = true;
594 }
595 } else {
596 if (GetLine(line, interrupted)) {
597 if (interrupted)
598 m_delegate.IOHandlerInputInterrupted(*this, line);
599 else
600 m_delegate.IOHandlerInputComplete(*this, line);
601 } else {
602 m_done = true;
603 }
604 }
605 }
606 }
607
Cancel()608 void IOHandlerEditline::Cancel() {
609 #if LLDB_ENABLE_LIBEDIT
610 if (m_editline_up)
611 m_editline_up->Cancel();
612 #endif
613 }
614
Interrupt()615 bool IOHandlerEditline::Interrupt() {
616 // Let the delgate handle it first
617 if (m_delegate.IOHandlerInterrupt(*this))
618 return true;
619
620 #if LLDB_ENABLE_LIBEDIT
621 if (m_editline_up)
622 return m_editline_up->Interrupt();
623 #endif
624 return false;
625 }
626
GotEOF()627 void IOHandlerEditline::GotEOF() {
628 #if LLDB_ENABLE_LIBEDIT
629 if (m_editline_up)
630 m_editline_up->Interrupt();
631 #endif
632 }
633
PrintAsync(const char * s,size_t len,bool is_stdout)634 void IOHandlerEditline::PrintAsync(const char *s, size_t len, bool is_stdout) {
635 #if LLDB_ENABLE_LIBEDIT
636 if (m_editline_up) {
637 std::lock_guard<std::recursive_mutex> guard(m_output_mutex);
638 lldb::StreamFileSP stream = is_stdout ? m_output_sp : m_error_sp;
639 m_editline_up->PrintAsync(stream.get(), s, len);
640 } else
641 #endif
642 {
643 #ifdef _WIN32
644 const char *prompt = GetPrompt();
645 if (prompt) {
646 // Back up over previous prompt using Windows API
647 CONSOLE_SCREEN_BUFFER_INFO screen_buffer_info;
648 HANDLE console_handle = GetStdHandle(STD_OUTPUT_HANDLE);
649 GetConsoleScreenBufferInfo(console_handle, &screen_buffer_info);
650 COORD coord = screen_buffer_info.dwCursorPosition;
651 coord.X -= strlen(prompt);
652 if (coord.X < 0)
653 coord.X = 0;
654 SetConsoleCursorPosition(console_handle, coord);
655 }
656 #endif
657 IOHandler::PrintAsync(s, len, is_stdout);
658 #ifdef _WIN32
659 if (prompt)
660 IOHandler::PrintAsync(prompt, strlen(prompt), is_stdout);
661 #endif
662 }
663 }
664