paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-08-17 07:49:27 +02:00
Code Issues Packages Projects Releases Wiki Activity

Try to minimize (NOT a fix) the risks of TProcessUtf8 crashes. Crash introduced in r50595 #d0dace2bf5 for issue #28991 / See also issue #035991

Browse Source 
git-svn-id: trunk@61736 -
This commit is contained in:
martin 2019-08-20 22:16:37 +00:00
parent 4bfff289c6
commit bf0028cac1
1 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
components/lazutils/utf8process.pp
View File

@ -76,6 +76,7 @@ type
{$ENDIF}
{$IFDEF UseTProcessW}
{$Optimization -ORDERFIELDS }
const
SNoCommandLine = 'Cannot execute empty command-line';
SErrCannotExecute = 'Failed to execute %s : %d';
@ -565,7 +566,10 @@ var
o: TProcessClassTemplate;
begin
o:=TProcessClassTemplate.Create(nil);
PHANDLE(Pointer(Self)+(@o.FProcessHandle-Pointer(o)))^:=aProcessHandle;
if (@o.FProcessHandle-Pointer(o) <= TProcessUTF8.InstanceSize - SizeOf(HANDLE)) and
(PHANDLE(Pointer(Self)+(@o.FProcessHandle-Pointer(o)))^ = ProcessHandle)
then
PHANDLE(Pointer(Self)+(@o.FProcessHandle-Pointer(o)))^:=aProcessHandle;
if aProcessHandle<>ProcessHandle then
raise Exception.Create('TProcessUTF8.SetProcessHandle failed');
o.Free;
@ -576,7 +580,10 @@ var
o: TProcessClassTemplate;
begin
o:=TProcessClassTemplate.Create(nil);
PHANDLE(Pointer(Self)+(@o.FThreadHandle-Pointer(o)))^:=aThreadHandle;
if (@o.FThreadHandle-Pointer(o) <= TProcessUTF8.InstanceSize - SizeOf(HANDLE)) and
(PHANDLE(Pointer(Self)+(@o.FThreadHandle-Pointer(o)))^ = ThreadHandle)
then
PHANDLE(Pointer(Self)+(@o.FThreadHandle-Pointer(o)))^:=aThreadHandle;
if aThreadHandle<>ThreadHandle then
raise Exception.Create('TProcessUTF8.SetThreadHandle failed');
o.Free;
@ -587,7 +594,10 @@ var
o: TProcessClassTemplate;
begin
o:=TProcessClassTemplate.Create(nil);
PHANDLE(Pointer(Self)+(@o.FProcessID-Pointer(o)))^:=aProcessID;
if (@o.FProcessID-Pointer(o) <= TProcessUTF8.InstanceSize - SizeOf(HANDLE)) and
(PHANDLE(Pointer(Self)+(@o.FProcessID-Pointer(o)))^ = ProcessID)
then
PHANDLE(Pointer(Self)+(@o.FProcessID-Pointer(o)))^:=aProcessID;
if aProcessID<>ProcessID then
raise Exception.Create('TProcessUTF8.SetProcessID failed');
o.Free;