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FpDebugger (native): Use a pseudo-terminal to capture console output on OS/X

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git-svn-id: trunk@46095 -
This commit is contained in:
joost 2014-08-31 12:45:43 +00:00
parent f0d304c56c
commit 27c60931ec
1 changed files with 95 additions and 0 deletions
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95
components/fpdebug/fpdbgdarwinclasses.pas
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@ -9,6 +9,7 @@ uses
Classes,
SysUtils,
BaseUnix,
termio,
process,
FpDbgClasses,
FpDbgLoader,
@ -125,6 +126,7 @@ type
FProcProcess: TProcess;
FIsTerminating: boolean;
FExceptionSignal: PtrUInt;
FMasterPtyFd: cint;
function GetDebugAccessRights: boolean;
{$ifndef VER2_6}
procedure OnForkEvent(Sender : TObject);
@ -141,6 +143,10 @@ type
function ReadData(const AAdress: TDbgPtr; const ASize: Cardinal; out AData): Boolean; override;
function WriteData(const AAdress: TDbgPtr; const ASize: Cardinal; const AData): Boolean; override;
function CheckForConsoleOutput(ATimeOutMs: integer): integer; override;
function GetConsoleOutput: string; override;
procedure SendConsoleInput(AString: string); override;
function GetInstructionPointerRegisterValue: TDbgPtr; override;
function GetStackPointerRegisterValue: TDbgPtr; override;
function GetStackBasePointerRegisterValue: TDbgPtr; override;
@ -155,6 +161,11 @@ procedure RegisterDbgClasses;
implementation
var
GSlavePtyFd: cint;
GMasterPtyFd: cint;
GSlavePty: string;
type
vm_map_t = mach_port_t;
vm_offset_t = UIntPtr;
@ -205,6 +216,11 @@ function task_threads(target_task: task_t; var act_list: thread_act_array_t; var
function thread_get_state(target_act: thread_act_t; flavor: thread_state_flavor_t; old_state: thread_state_t; var old_stateCnt: mach_msg_Type_number_t): kern_return_t; cdecl external name 'thread_get_state';
function thread_set_state(target_act: thread_act_t; flavor: thread_state_flavor_t; new_state: thread_state_t; old_stateCnt: mach_msg_Type_number_t): kern_return_t; cdecl external name 'thread_set_state';
function posix_openpt(oflag: cint): cint;cdecl;external 'c' name 'posix_openpt';
function ptsname(__fd:longint):Pchar;cdecl;external 'c' name 'ptsname';
function grantpt(__fd:longint):longint;cdecl;external 'c' name 'grantpt';
function unlockpt(__fd:longint):longint;cdecl;external 'c' name 'unlockpt';
procedure RegisterDbgClasses;
begin
OSDbgClasses.DbgProcessClass:=TDbgDarwinProcess;
@ -218,12 +234,44 @@ end;
{ TDbgDarwinThread }
Function safefpdup2(fildes, fildes2 : cInt): cInt;
begin
repeat
safefpdup2:=fpdup2(fildes,fildes2);
until (safefpdup2<>-1) or (fpgeterrno<>ESysEINTR);
end;
{$ifndef VER2_6}
procedure TDbgDarwinProcess.OnForkEvent(Sender: TObject);
{$else}
procedure OnForkEvent;
{$endif VER2_6}
begin
if FpSetsid<>0 then
begin
// For some reason, FpSetsid always fails.
// writeln('Failed to set sid. '+inttostr(fpgeterrno));
end;
if GSlavePty<>'' then
begin
GSlavePtyFd:=FpOpen(GSlavePty, O_RDWR + O_NOCTTY);
if GSlavePtyFd>-1 then
begin
if (FpIOCtl(GSlavePtyFd, TIOCSCTTY, nil) = -1) then
begin
// This call always fails for some reason. That's also why login_tty can not be used. (login_tty
// also calls TIOCSCTTY, but when it fails it aborts) The failure is ignored.
// writeln('Failed to set tty '+inttostr(fpgeterrno));
end;
safefpdup2(GSlavePtyFd,0);
safefpdup2(GSlavePtyFd,1);
safefpdup2(GSlavePtyFd,2);
end
else
writeln('Failed to open tty '+GSlavePty+'. Errno: '+inttostr(fpgeterrno));
end;
fpPTrace(PTRACE_TRACEME, 0, nil, nil);
end;
@ -619,6 +667,8 @@ end;
destructor TDbgDarwinProcess.Destroy;
begin
FProcProcess.Free;
if FMasterPtyFd>-1 then
FpClose(FMasterPtyFd);
inherited Destroy;
end;
@ -654,11 +704,26 @@ begin
AProcess.Parameters:=AParams;
AProcess.Environment:=AnEnvironment;
AProcess.CurrentDirectory:=AWorkingDirectory;
GSlavePty:='';
GMasterPtyFd := posix_openpt(O_RDWR + O_NOCTTY);
if GMasterPtyFd<0 then
AOnLog('Failed to open pseudo-tty. Errno: ' + IntToStr(fpgeterrno), dllDebug)
else
begin
if grantpt(GMasterPtyFd)<>0 then
AOnLog('Failed to set pseudo-tty slave permissions. Errno: ' + IntToStr(fpgeterrno), dllDebug);
if unlockpt(GMasterPtyFd)<>0 then
AOnLog('Failed to unlock pseudo-tty slave. Errno: ' + IntToStr(fpgeterrno), dllDebug);
GSlavePty := strpas(ptsname(GMasterPtyFd));
end;
AProcess.Execute;
PID:=AProcess.ProcessID;
sleep(100);
result := TDbgDarwinProcess.Create(AFileName, Pid, -1, AOnLog);
TDbgDarwinProcess(result).FMasterPtyFd := GMasterPtyFd;
TDbgDarwinProcess(result).FProcProcess := AProcess;
except
on E: Exception do
@ -712,6 +777,36 @@ begin
result := true;
end;
function TDbgDarwinProcess.CheckForConsoleOutput(ATimeOutMs: integer): integer;
Var
f: TfdSet;
sleepytime: ttimeval;
begin
sleepytime.tv_sec := ATimeOutMs div 1000;
sleepytime.tv_usec := (ATimeOutMs mod 1000)*1000;
FpFD_ZERO(f);
fpFD_SET(FMasterPtyFd,f);
result := fpselect(FMasterPtyFd+1,@f,nil,nil,@sleepytime);
end;
function TDbgDarwinProcess.GetConsoleOutput: string;
var
ABytesRead: cint;
ABuf: array[0..1023] of char;
begin
ABytesRead := fpRead(FMasterPtyFd, ABuf[0], SizeOf(ABuf));
if ABytesRead>0 then
result := Copy(ABuf, 0, ABytesRead)
else
result := '';
end;
procedure TDbgDarwinProcess.SendConsoleInput(AString: string);
begin
if FpWrite(FMasterPtyFd, AString[1], length(AString)) <> Length(AString) then
Log('Failed to send input to console.', dllDebug);
end;
function TDbgDarwinProcess.GetInstructionPointerRegisterValue: TDbgPtr;
begin
if Mode=dm32 then