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digitalmars.D.learn - DMD [-O flag] vs. [memory allocation in a synchronized class]

reply realhet <real_het hotmail.com> writes:
Hi,

This code works well with the unoptimized compilation with DMD.

import std.array;

synchronized class Obj{
   private int[] arr;
   void trigger(){ arr.length += 1; }
}

void main(){
   auto k = new shared Obj;
   k.trigger;
}

And when I use the -O option, it shows the following error in the 
trigger() method:

core.exception.InvalidMemoryOperationError src\core\exception.d(696): Invalid
memory operation

Why? o.O
Jun 08 2017
parent reply ketmar <ketmar ketmar.no-ip.org> writes:
worksforme with -O, and with -O -inline.
Jun 08 2017
parent reply realhet <real_het hotmail.com> writes:
On Thursday, 8 June 2017 at 10:48:41 UTC, ketmar wrote:

 worksforme with -O, and with -O -inline.


I forgot to mention, that I'm generating win32 output.
DMD32 D Compiler v2.074.0
Jun 08 2017
parent reply ketmar <ketmar ketmar.no-ip.org> writes:
realhet wrote:


 On Thursday, 8 June 2017 at 10:48:41 UTC, ketmar wrote:

 worksforme with -O, and with -O -inline.


 I forgot to mention, that I'm generating win32 output.
 DMD32 D Compiler v2.074.0


mine: GNU/Linux, 32 bit, dmd git HEAD.
Jun 08 2017
parent reply realhet <real_het hotmail.com> writes:
I've managed to narrow the problem even more:

//win32 dmd -O

class Obj{
   synchronized void trigger(){ new ubyte[1]; }
}

void main(){
   auto k = new shared Obj;
   k.trigger;
}

This time I got a more sophisticated error message:

object.Error (0): Access Violation
----------------
0x7272456D in SymInitialize
0x00402667
0x00402A97
0x00402998
0x004022A0
0x76F13744 in BaseThreadInitThunk
0x773B9E54 in RtlSetCurrentTransaction
0x773B9E1F in RtlSetCurrentTransaction
Jun 08 2017
parent reply Ivan Kazmenko <gassa mail.ru> writes:
On Thursday, 8 June 2017 at 11:41:40 UTC, realhet wrote:

 I've managed to narrow the problem even more:

 //win32 dmd -O

 class Obj{
   synchronized void trigger(){ new ubyte[1]; }
 }

 void main(){
   auto k = new shared Obj;
   k.trigger;
 }

 This time I got a more sophisticated error message:

 object.Error (0): Access Violation
 ----------------
 0x7272456D in SymInitialize
 0x00402667
 0x00402A97
 0x00402998
 0x004022A0
 0x76F13744 in BaseThreadInitThunk
 0x773B9E54 in RtlSetCurrentTransaction
 0x773B9E1F in RtlSetCurrentTransaction


I can reproduce this under win32, and it breaks somewhere between 
2.068.2 and 2.069.0.

The move instructive message with "dmd -O -g":

object.Error (0): Access Violation
----------------
0x00000065
0x00402C33 in _d_newarrayU
0x004022EB in _d_newarrayT
0x00402A7F in scope void rt.dmain2._d_run_main(int, char**, 
extern (C) int function(char[][])*).runAll()
0x00402980 in _d_run_main
0x00402288 in main at C:\a.d(8)
0x757F336A in BaseThreadInitThunk
0x77409902 in RtlInitializeExceptionChain
0x774098D5 in RtlInitializeExceptionChain

Perhaps a regression should be filed, or searched for, at 
issues.dlang.org.  I can do it, but not right now, and would be 
glad if someone beats me to it.

Ivan Kazmenko.
Jun 08 2017
parent reply Ivan Kazmenko <gassa mail.ru> writes:
On Thursday, 8 June 2017 at 15:35:06 UTC, Ivan Kazmenko wrote:

 Perhaps a regression should be filed, or searched for, at 
 issues.dlang.org.  I can do it, but not right now, and would be 
 glad if someone beats me to it.


Reported: https://issues.dlang.org/show_bug.cgi?id=17481
Jun 08 2017
parent realhet <real_het hotmail.com> writes:
On Thursday, 8 June 2017 at 17:39:41 UTC, Ivan Kazmenko wrote:

 Reported: https://issues.dlang.org/show_bug.cgi?id=17481


Thank You!
Jun 09 2017