[PATCH] linux-user/strace: show TID instead of PID

["J. Neuschäfer" <j.neuschaefer@gmx.net>]

This aligns with strace, and is very useful when tracing multi-threaded
programs. The result is the same in single-threaded programs.

gettid() requires the _GNU_SOURCE feature test macro, so it might be
unavailable in rare cases. I don't expect it to be a problem though,
because it's implemented by both glibc and musl.

Signed-off-by: J. Neuschäfer <j.neuschaefer@gmx.net>
---
 linux-user/strace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/linux-user/strace.c b/linux-user/strace.c
index c3eb3a2706a93fdcaf693b3413b13921a3c97e8e..93e8c73de8a4a307e6e0df5555bee4c769e41e64 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -4337,7 +4337,7 @@ print_syscall(CPUArchState *cpu_env, int num,
     if (!f) {
         return;
     }
-    fprintf(f, "%d ", getpid());
+    fprintf(f, "%d ", gettid());

     for (i = 0; i < nsyscalls; i++) {
         if (scnames[i].nr == num) {

---
base-commit: 6f625ce2f21d6a1243065d236298277c56f972d5
change-id: 20241024-strace-a52bd8e3d305

Best regards,
--
J. Neuschäfer <j.neuschaefer@gmx.net>