On 08/06/2023 19:59, Giuliano Colla via fpc-devel wrote:
Il 08/06/23 18:40, Martin Frb via fpc-devel ha scritto:
It seems that on Cocoa an exe is by default relocatable.
At least a basic test shows that dumping a stack at runtime for each
run (no new compile) gives new addresses.
Fpc 3.2.2
Is there a way to turn this off? (some flag to pass to the linker?)
AFAIK there's no way. It's a feature deep in the way the OS handles
memory. In a multiprogramming environment any executable must be by
definition relocatable, because at each run it must fit in a free area
of memory. So the OS has two choices. Either the executable is not
relocatable, and you trick it by altering the Memory Management Unit
tables to map its virtual fixed addresses to any free memory area, or
you make it relocatable, loose a little time when loading to locate
it, and do not tamper with MMU mapping tables. It's a system design
choice.
Great... Yes, it is an important security feature. But a show stopper
for people who need to debug.
https://forum.lazarus.freepascal.org/index.php/topic,63571.0.html
1) Afaik, FPC still can't resolve addresses with -gl (the line info
unit, that produces nice dumps on other Platforms).
2) Users can't later resolve them either.
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