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{linux,bsd}-user: Pass pid to fork_end()

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The upcoming follow-fork-mode child support requires knowing the child
pid. Pass it down.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240219141628.246823-6-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-7-alex.bennee@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2024-03-05 12:09:42 +00:00 • committed by Alex Bennée
parent 3d6ed98da8
commit 4edc98fcc8
6 changed files with 14 additions and 10 deletions
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6
linux-user/syscall.c
View file

@ -6669,7 +6669,7 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,
if (ret == 0) {
/* Child Process. */
cpu_clone_regs_child(env, newsp, flags);
fork_end(1);
fork_end(ret);
/* There is a race condition here. The parent process could
theoretically read the TID in the child process before the child
tid is set. This would require using either ptrace
@ -6700,8 +6700,8 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,
}
#endif
put_user_u32(pid_fd, parent_tidptr);
}
fork_end(0);
}
fork_end(ret);
}
g_assert(!cpu_in_exclusive_context(cpu));
}