musl/src/process/aarch64, branch master musl - an implementation of the standard library for Linux-based systems aarch64: add vfork 2022-08-01T17:37:39+00:00 Szabolcs Nagy nsz@port70.net 2022-07-16T13:55:51+00:00 4f48da008d1fb3ccab2ad76523c104aa3fa8d8b6 The generic vfork implementation uses clone(SIGCHLD) which has fork semantics. Implement vfork as clone(SIGCHLD|CLONE_VM|CLONE_VFORK, 0) instead which has vfork semantics. (stack == 0 means sp is unchanged in the child.) Some users rely on vfork semantics when memory overcommit is disabled or when the vfork child runs code that synchronizes with the parent process (non-conforming). 
The generic vfork implementation uses clone(SIGCHLD) which has fork
semantics.

Implement vfork as clone(SIGCHLD|CLONE_VM|CLONE_VFORK, 0) instead which
has vfork semantics. (stack == 0 means sp is unchanged in the child.)

Some users rely on vfork semantics when memory overcommit is disabled
or when the vfork child runs code that synchronizes with the parent
process (non-conforming).