topic ABAP Debugger: Extract Dominator Tree Data into Internal Table in Application Development and Automation Discussions

ABAP Debugger: Extract Dominator Tree Data into Internal Table

peter_atkin — Tue, 30 Oct 2018 17:44:49 GMT

Hi All,

In the ABAP debugger we can see the data held in memory via the "Dominator Tree" (memory analysis tool).

Is there a way to get this data into an internal table (similar to getting the call stack via cl_abap_compiler->get_all_refs)?

Thanks in advance

PeteA

Re: ABAP Debugger: Extract Dominator Tree Data into Internal Table

peter_atkin — Mon, 22 Jul 2019 16:42:58 GMT

OK, sort of found the answer myself.

Here’s two code snippets to get the PROGRAMS and ITAB-HEADS data from the System Area screen tool in the debugger.

*&------------------------------------------------------------&*
*& Get System Areas: PROGRAMS
*&-------------------------------------------------------------&*
data: begin of pxa occurs 0, 
head(5) type c, prog like help_info-program, 
rest(35) type c, 
end of pxa.

call 'SAPCORE' id 'ID' field 'PROGRAMS' 
id 'TABLE' field pxa-*sys*. 

*&-------------------------------------------------------------&*
*& Get System Areas: ITAB-HEADS
*&-------------------------------------------------------------&*
data: begin of lt_itab_heads occurs 0,  
num(8) type c,  
shm_vers_id(14) type c,  
tabhid(7) type c,  
name(57) type c,  
fill(10) type c,  
lines(5) type c,  
linesalloc(16) type c,  
label(5) type c,end of lt_itab_heads.

call 'SAPCORE' id 'ID' field 'ITAB-HEADS' 
               id 'TABLE' field itab-*sys*.

The pain is working out the internal table structure. In the debugger you need to select the relevant system area (in this example ITAB-HEADS), then manually work out the column sizes and plug it into the internal table definition. This is because the table below is a long text string!!!

Here's the result for the system area data in the LT_ITAB_HEADS internal table:

PeteA

Re: ABAP Debugger: Extract Dominator Tree Data into Internal Table

Sandra_Rossi — Tue, 23 Jul 2019 03:27:39 GMT

Officially, there are only the methods GET_TOTAL_USED_SIZE and GET_MEMORY_SIZE_OF_OBJECT of class CL_ABAP_MEMORY_UTILITIES. For more information, refer to the class documentation in the ABAP backend.

Unfortunately, they can't return the list of top variables.

Re: ABAP Debugger: Extract Dominator Tree Data into Internal Table

peter_atkin — Tue, 23 Jul 2019 14:24:36 GMT

Hi Sandra,

Yup - I played around with these, but they only bring back aggregated information.

The solution above seems to work for any System Area object.

PeteA