commit 9c15e70086f3343bd810c6150d92ebfd6f346fcf
author Lluís Vilanova <vilanova@ac.upc.edu> Tue Jun 21 15:52:04 2016 +0200
committer Stefan Hajnoczi <stefanha@redhat.com> Tue Jun 28 21:14:12 2016 +0100
tree bdd17dcf3a603d844b208038f333f0bf8de6fe6f
parent 06a1e0c197ec631a2a3e47a803c52609a8405f69

trace: [*-user] Add events to trace guest syscalls in syscall emulation mode

Adds two events to trace syscalls in syscall emulation mode (*-user):

* guest_user_syscall: Emitted before the syscall is emulated; contains
  the syscall number and arguments.

* guest_user_syscall_ret: Emitted after the syscall is emulated;
  contains the syscall number and return value.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 146651712411.12388.10024905980452504938.stgit@fimbulvetr.bsc.es
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

bsd-user/syscall.c

diff --git a/bsd-user/syscall.c b/bsd-user/syscall.c
index a9fe869..66492aa 100644
--- a/bsd-user/syscall.c
+++ b/bsd-user/syscall.c
@@ -315,12 +315,14 @@
                             abi_long arg5, abi_long arg6, abi_long arg7,
                             abi_long arg8)
 {
+    CPUState *cpu = ENV_GET_CPU(cpu_env);
     abi_long ret;
     void *p;
 
 #ifdef DEBUG
     gemu_log("freebsd syscall %d\n", num);
 #endif
+    trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
     if(do_strace)
         print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
 
@@ -400,6 +402,7 @@
 #endif
     if (do_strace)
         print_freebsd_syscall_ret(num, ret);
+    trace_guest_user_syscall_ret(cpu, num, ret);
     return ret;
  efault:
     ret = -TARGET_EFAULT;
@@ -410,12 +413,14 @@
                            abi_long arg2, abi_long arg3, abi_long arg4,
                            abi_long arg5, abi_long arg6)
 {
+    CPUState *cpu = ENV_GET_CPU(cpu_env);
     abi_long ret;
     void *p;
 
 #ifdef DEBUG
     gemu_log("netbsd syscall %d\n", num);
 #endif
+    trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
     if(do_strace)
         print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
 
@@ -472,6 +477,7 @@
 #endif
     if (do_strace)
         print_netbsd_syscall_ret(num, ret);
+    trace_guest_user_syscall_ret(cpu, num, ret);
     return ret;
  efault:
     ret = -TARGET_EFAULT;
@@ -482,12 +488,14 @@
                             abi_long arg2, abi_long arg3, abi_long arg4,
                             abi_long arg5, abi_long arg6)
 {
+    CPUState *cpu = ENV_GET_CPU(cpu_env);
     abi_long ret;
     void *p;
 
 #ifdef DEBUG
     gemu_log("openbsd syscall %d\n", num);
 #endif
+    trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
     if(do_strace)
         print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
 
@@ -544,6 +552,7 @@
 #endif
     if (do_strace)
         print_openbsd_syscall_ret(num, ret);
+    trace_guest_user_syscall_ret(cpu, num, ret);
     return ret;
  efault:
     ret = -TARGET_EFAULT;