From d9b019e0a05cbbaa184815dd201b25006950c6d7 Mon Sep 17 00:00:00 2001 From: Fabio D'Urso Date: Wed, 19 Jun 2024 21:41:09 +0200 Subject: [PATCH] linux-user: open_self_stat: Implement num_threads MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The num_threads field reports the total number of threads in the process. In QEMU, this is equal to the number of CPU instances. Signed-off-by: Fabio D'Urso Reviewed-by: Alex Bennée Message-ID: <20240619194109.248066-1-fdurso@google.com> Signed-off-by: Richard Henderson --- linux-user/syscall.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index b8c278b91d..9d5415674d 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8168,6 +8168,16 @@ static int open_self_stat(CPUArchState *cpu_env, int fd) } else if (i == 3) { /* ppid */ g_string_printf(buf, FMT_pid " ", getppid()); + } else if (i == 19) { + /* num_threads */ + int cpus = 0; + WITH_RCU_READ_LOCK_GUARD() { + CPUState *cpu_iter; + CPU_FOREACH(cpu_iter) { + cpus++; + } + } + g_string_printf(buf, "%d ", cpus); } else if (i == 21) { /* starttime */ g_string_printf(buf, "%" PRIu64 " ", ts->start_boottime);