Improve ptrace-error detection on Linux targets

[thirdparty/binutils-gdb.git] / gdb / inf-ptrace.c

diff --git a/gdb/inf-ptrace.c b/gdb/inf-ptrace.c
index 4a8e7323736cdab22ee328119a0b2ffa0b0600e9..b792af00d10d085d5482d779e9bd41e80fc3a8b8 100644 (file)
--- a/gdb/inf-ptrace.c
+++ b/gdb/inf-ptrace.c
@@ -94,6 +94,20 @@ inf_ptrace_target::remove_fork_catchpoint (int pid)
 #endif /* PT_GET_PROCESS_STATE */
 \f
 
+/* Default method for "inf_ptrace_me_fail_reason", which returns an
+   empty string.  */
+
+static std::string
+default_inf_ptrace_me_fail_reason (int err)
+{
+  return {};
+}
+
+/* See inf-ptrace.h.  */
+
+std::string (*inf_ptrace_me_fail_reason) (int err)
+  = default_inf_ptrace_me_fail_reason;
+
 /* Prepare to be traced.  */
 
 static void
@@ -101,7 +115,8 @@ inf_ptrace_me (void)
 {
   /* "Trace me, Dr. Memory!"  */
   if (ptrace (PT_TRACE_ME, 0, (PTRACE_TYPE_ARG3) 0, 0) < 0)
-    trace_start_error_with_name ("ptrace");
+    trace_start_error_with_name ("ptrace",
+                                inf_ptrace_me_fail_reason (errno).c_str ());
 }
 
 /* Start a new inferior Unix child process.  EXEC_FILE is the file to