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linux-user: open_self_stat: Implement num_threads

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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 <fdurso@google.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20240619194109.248066-1-fdurso@google.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Fabio D'Urso 2024-06-19 21:41:09 +02:00 committed by Richard Henderson
parent 27fca0a0d5
commit d9b019e0a0
1 changed files with 10 additions and 0 deletions
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10
linux-user/syscall.c
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@ -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);