Memory allocation for cmdline in the rtl on macOS

Summary

Memory allocation for cmdline in the rtl on MacOS is inconsistent and can lead to crashes

System Information

MacOS 14.7

Problem description

rtl/inc/systemh.inc initialises cmdline to nil with var CmdLine:Pchar=nil; rtl/bsd/system.pp calls reallocmem(cmdline, ...) rtl/inc/system.inc calls sysfreemem(cmdline)

The calls to reallocmem and sysfreemem are inconsistent and this will lead to a crash (in sysfreemem) at program exit, if e.g. the memory manager at the time of realloc is the C memory manager.

Possible fixes

• call sysreallocmem(cmdline, ...) in rtl/bsd/system.pp rather than reallocmem(cmdline, ...)
• check to see if sysmem calls are used on other platforms for the (global) cmdline variable