Re: The execution trace of HHH1(DDD) shows the divergence

On 6/7/2025 11:43 AM, joes wrote:

Am Sat, 07 Jun 2025 11:02:55 -0500 schrieb olcott:

On 6/7/2025 10:54 AM, wij wrote:

On Sat, 2025-06-07 at 10:35 -0500, olcott wrote:

On 6/7/2025 10:31 AM, wij wrote:

On Sat, 2025-06-07 at 09:57 -0500, olcott wrote:

On 6/7/2025 9:54 AM, wij wrote:

On Sat, 2025-06-07 at 09:32 -0500, olcott wrote:

 

The execution trace of HHH1(DDD) shows the divergence of DDD
emulated by HHH from DDD emulated by HHH1.
Shows that DDD emulated by HHH and DDD emulated by HHH1 diverges
as soon as HHH begins emulating itself emulating DDD.
>
*From the execution trace of HHH1(DDD) shown below*
DDD emulated by HHH1              DDD emulated by HHH [00002183]
push ebp               [00002183] push ebp [00002184] mov
ebp,esp            [00002184] mov ebp,esp [00002186] push 00002183
; DDD    [00002186] push 00002183 ; DDD [0000218b] call 000015c3 ;
HHH    [0000218b] call 000015c3 ; HHH *HHH1 emulates DDD once then
HHH emulates DDD once, these match*

 What do you mean by "then" and "once"? That implies completion and
succession, however we are only ever simulating a single call, and
only HHH1 simulates any returns of DDD/HHH.
HHH1 simulates DDD completely, HHH recurses and aborts *inside*. HHH
does not simulate DDD once, it only enters the call, but never exits.
 

The next instruction of DDD that HHH emulates is at the machine
address of 00002183.
The next instruction of DDD that HHH1 emulates is at the machine
address of 00002190.

 At those addresses we have the first instruction of DDD and the one after
the call, respectively.
  [main -> HHH1(DDD) -> HHH(DDD) -> HHH(DDD)]

New slave_stack at:198d21  DDD emulated by HHH *This is the
beginning of the divergence of the behavior*
*HHH is emulating itself emulating DDD, HHH1 never does that*

 HHH1 does simulate HHH simulating DDD.
 

That is not the question being answered.
Within the execution trace of HHH1(DDD)
when we place DDD simulated by HHH1 and
DDD simulated by HHH side-by-side
DDD emulated by HHH1              DDD emulated by HHH
[00002183] push ebp               [00002183] push ebp
[00002184] mov ebp,esp            [00002184] mov ebp,esp
[00002186] push 00002183 ; DDD    [00002186] push 00002183 ; DDD
[0000218b] call 000015c3 ; HHH    [0000218b] call 000015c3 ; HHH
The next instruction of DDD emulated by HHH is 00002183.
The next instruction of DDD emulated by HHH1 is 00002190.
--
Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer