How to disassemble a certain procedure or function ?
lazarus / 12-Debugger

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misu · 2013-11-16 08:23

hi
i'd like to know how to do so . 
also methods inside classes too


thanks

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Martin_fr · 2013-11-16 13:28

You can

1) set a breakpoint, and when your app reaches it, you can look at the
assembler

2) If you break in a method called from the desired function, right
click the callstack. Each frame has a "view in assembler"

3) If you know the address, enter the address

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But if you just want to see what assembler is generated by fpc, and do
not need to debug it, then just compile with -al  (specify in "Project
Options" > Other > Custom). Then fpc generates *.s files with the asm
in it (search in the lib folder)

See: http://www.freepascal.org/docs-
html/user/usersu15.html#x38-450005.1.4

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misu · 2013-11-16 14:28

thank you Martin , thats what i want.

i've noticed that "next line" or "next instruction" is not as fast as
delphi , i know lazarus uses external debuger (gdb) but if you try
debuging with codeblocks for example you will find that its faster a
litle bit than lazarus .

thanks

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Martin_fr · 2013-11-16 14:34

There is a trick:

- Scroll the are of interest into view, maybe resize th ewindow
- Disable (power button) the assembler window), then next instruction
will be fast.

- When you reach the end of the current view, then you need to enable
once and scroll, to get a new disassemble.  Disable again

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Otherwise, you can also do the next step, before the disassembler
finishes.


EDIT:
F1 => http://wiki.lazarus.freepascal.org/IDE_Window:_Assembler

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misu · 2013-11-16 18:55

thanks again