With APS5_MIMALLOC set, libkernel restarts the title with
libmimalloc.so from libs/ first in LD_PRELOAD, as it does on macOS
with DYLD_INSERT_LIBRARIES. The macOS restart becomes one
implementation with platform pieces (MimallocRestart.cpp): on Linux
the executable is the target of /proc/self/exe and the arguments
those of /proc/self/cmdline. The restart is a priority 101
constructor, so it runs before libkernel's other initializers. It
gives the standard streams back from an ANYPS5_LOG_FILE copy before
execv, which also fixes the macOS restart under that variable, and
refuses a path the preload list cannot hold.
The build copies libmimalloc.so beside the libraries except in ASan
and TSan builds, the Linux release archives ship it, and the restart
tests run on Linux too, with a new case for ANYPS5_LOG_FILE.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015W3M6NbYpmwWkzkL8YNLaF
