diff options
| -rw-r--r-- | linux-user/main.c | 14 | ||||
| -rw-r--r-- | linux-user/qemu.h | 3 | ||||
| -rw-r--r-- | linux-user/syscall.c | 3 |
3 files changed, 20 insertions, 0 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 16def5215d..fbc9bcfd5f 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -190,12 +190,26 @@ void stop_all_tasks(void) /* Assumes contents are already zeroed. */ void init_task_state(TaskState *ts) { + long ticks_per_sec; + struct timespec bt; + ts->used = 1; ts->sigaltstack_used = (struct target_sigaltstack) { .ss_sp = 0, .ss_size = 0, .ss_flags = TARGET_SS_DISABLE, }; + + /* Capture task start time relative to system boot */ + + ticks_per_sec = sysconf(_SC_CLK_TCK); + + if ((ticks_per_sec > 0) && !clock_gettime(CLOCK_BOOTTIME, &bt)) { + /* start_boottime is expressed in clock ticks */ + ts->start_boottime = bt.tv_sec * (uint64_t) ticks_per_sec; + ts->start_boottime += bt.tv_nsec * (uint64_t) ticks_per_sec / + NANOSECONDS_PER_SECOND; + } } CPUArchState *cpu_copy(CPUArchState *env) diff --git a/linux-user/qemu.h b/linux-user/qemu.h index 9d2b3119d1..98dfbf2096 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -154,6 +154,9 @@ typedef struct TaskState { /* This thread's sigaltstack, if it has one */ struct target_sigaltstack sigaltstack_used; + + /* Start time of task after system boot in clock ticks */ + uint64_t start_boottime; } TaskState; abi_long do_brk(abi_ulong new_brk); diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 84cfa223df..b3948d13a9 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8077,6 +8077,9 @@ static int open_self_stat(void *cpu_env, int fd) } else if (i == 3) { /* ppid */ g_string_printf(buf, FMT_pid " ", getppid()); + } else if (i == 21) { + /* starttime */ + g_string_printf(buf, "%" PRIu64 " ", ts->start_boottime); } else if (i == 27) { /* stack bottom */ g_string_printf(buf, TARGET_ABI_FMT_ld " ", ts->info->start_stack); |