From: Ilya Leoshkevich <iii@linux.ibm.com>
Borrow the code for formatting the most frequent WIFEXITED() and
WIFSIGNALED() special cases from from the strace's printstatus().
Output examples:
474729 wait4(-1,0x7f00767ff0a0,0,(nil)) = 474733 (wstatus={WIFEXITED(s) && WEXITSTATUS(s) == 1})
475833 wait4(-1,0x7f7de61ff0a0,0,(nil)) = 475837 (wstatus={WIFSIGNALED(s) && WTERMSIG(s) == SIGKILL})
1168 waitpid(1171,0x7f44eea00340,0) = 1171 (wstatus={WIFSIGNALED(s) && WTERMSIG(s) == SIGKILL})
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20241001193244.14939-1-iii@linux.ibm.com>
[rth: Drop extra output for NULL wstatus or error reading.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/strace.c | 57 ++++++++++++++++++++++++++++++++++++++++++
linux-user/strace.list | 6 +++--
2 files changed, 61 insertions(+), 2 deletions(-)
diff --git a/linux-user/strace.c b/linux-user/strace.c
index d3cdd09dc1..cf9eaf71c9 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -4215,6 +4215,63 @@ print_ioctl(CPUArchState *cpu_env, const struct syscallname *name,
}
#endif
+#if defined(TARGET_NR_wait4) || defined(TARGET_NR_waitpid)
+static void print_wstatus(int wstatus)
+{
+ if (WIFSIGNALED(wstatus)) {
+ qemu_log("{WIFSIGNALED(s) && WTERMSIG(s) == ");
+ print_signal(WTERMSIG(wstatus), 1);
+ if (WCOREDUMP(wstatus)) {
+ qemu_log(" && WCOREDUMP(s)");
+ }
+ qemu_log("}");
+ } else if (WIFEXITED(wstatus)) {
+ qemu_log("{WIFEXITED(s) && WEXITSTATUS(s) == %d}",
+ WEXITSTATUS(wstatus));
+ } else {
+ print_number(wstatus, 1);
+ }
+}
+
+static void print_ret_wstatus(abi_long ret, abi_long wstatus_addr)
+{
+ int wstatus;
+
+ if (!print_syscall_err(ret)
+ && wstatus_addr
+ && get_user_s32(wstatus, wstatus_addr)) {
+ qemu_log(TARGET_ABI_FMT_ld " (wstatus=", ret);
+ print_wstatus(wstatus);
+ qemu_log(")");
+ }
+ qemu_log("\n");
+}
+#endif
+
+#ifdef TARGET_NR_wait4
+static void
+print_syscall_ret_wait4(CPUArchState *cpu_env,
+ const struct syscallname *name,
+ abi_long ret, abi_long arg0, abi_long arg1,
+ abi_long arg2, abi_long arg3, abi_long arg4,
+ abi_long arg5)
+{
+ print_ret_wstatus(ret, arg1);
+}
+#endif
+
+#ifdef TARGET_NR_waitpid
+static void
+print_syscall_ret_waitpid(CPUArchState *cpu_env,
+ const struct syscallname *name,
+ abi_long ret, abi_long arg0, abi_long arg1,
+ abi_long arg2, abi_long arg3, abi_long arg4,
+ abi_long arg5)
+{
+ print_ret_wstatus(ret, arg1);
+}
+#endif
+
/*
* An array of all of the syscalls we know about
*/
diff --git a/linux-user/strace.list b/linux-user/strace.list
index ef658224fc..f8899710b5 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1662,13 +1662,15 @@
{ TARGET_NR_vserver, "vserver" , NULL, NULL, NULL },
#endif
#ifdef TARGET_NR_wait4
-{ TARGET_NR_wait4, "wait4" , "%s(%d,%p,%d,%p)", NULL, NULL },
+{ TARGET_NR_wait4, "wait4" , "%s(%d,%p,%d,%p)", NULL,
+ print_syscall_ret_wait4 },
#endif
#ifdef TARGET_NR_waitid
{ TARGET_NR_waitid, "waitid" , "%s(%#x,%d,%p,%#x)", NULL, NULL },
#endif
#ifdef TARGET_NR_waitpid
-{ TARGET_NR_waitpid, "waitpid" , "%s(%d,%p,%#x)", NULL, NULL },
+{ TARGET_NR_waitpid, "waitpid", "%s(%d,%p,%#x)", NULL,
+ print_syscall_ret_waitpid },
#endif
#ifdef TARGET_NR_write
{ TARGET_NR_write, "write" , "%s(%d,%#x,%d)", NULL, NULL },
--
2.43.0