config, btrace: check for pt_insn_event in libipt

Version 2 of libipt adds an event system to instruction flow decoders and
deprecates indicating events via flags in struct pt_insn.  Add configuration
checks to determine which version we have.

gdb/
	* configure.ac: Check for pt_insn_event, struct pt_insn.enabled,
	and struct pt_insn.resynced.
	* configure: Regenerated.
	* config.in: Regenerated.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f46a2837f49a9417a1d9c26c9478fd139f09f5b3..ac2394fc12c00df85a82d5d33eb45f7ebc55066f 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2017-05-31  Markus Metzger  <markus.t.metzger@intel.com>
+
+       * configure.ac: Check for pt_insn_event, struct pt_insn.enabled,
+       and struct pt_insn.resynced.
+       * configure: Regenerated.
+       * config.in: Regenerated.
+
 2017-05-30  Tim Wiederhake  <tim.wiederhake@intel.com>
 
        * btrace.c (ftrace_find_call_by_number): New function.

diff --git a/gdb/config.in b/gdb/config.in
index 3f8a72326b5d32db6ad8966c05045e248f955498..4a40956ae066ac160968d453b75f815be274894a 100644 (file)
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -381,6 +381,9 @@
 /* Define if sys/ptrace.h defines the PT_GETXMMREGS request. */
 #undef HAVE_PT_GETXMMREGS
 
+/* Define to 1 if you have the `pt_insn_event' function. */
+#undef HAVE_PT_INSN_EVENT
+
 /* Define to 1 if you have the `pwrite' function. */
 #undef HAVE_PWRITE
 
@@ -462,6 +465,12 @@
 /* Define to 1 if `struct ptrace_lwpinfo' is a member of `pl_tdname'. */
 #undef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME
 
+/* Define to 1 if `struct pt_insn' is a member of `enabled'. */
+#undef HAVE_STRUCT_PT_INSN_ENABLED
+
+/* Define to 1 if `struct pt_insn' is a member of `resynced'. */
+#undef HAVE_STRUCT_PT_INSN_RESYNCED
+
 /* Define to 1 if your system has struct reg in <machine/reg.h>. */
 #undef HAVE_STRUCT_REG
 

diff --git a/gdb/configure b/gdb/configure
index 8df81acadce932ee6be96a86006b905cfd8f072a..1f15d5d382e6b54975f8d8be3b714c7d536ee70d 100755 (executable)
--- a/gdb/configure
+++ b/gdb/configure
@@ -2248,6 +2248,63 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_check_func
 
+# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
+# ----------------------------------------------------
+# Tries to find if the field MEMBER exists in type AGGR, after including
+# INCLUDES, setting cache variable VAR accordingly.
+ac_fn_c_check_member ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
+$as_echo_n "checking for $2.$3... " >&6; }
+if { as_var=$4; eval "test \"\${$as_var+set}\" = set"; }; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main ()
+{
+static $2 ac_aggr;
+if (ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$4=yes"
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$5
+int
+main ()
+{
+static $2 ac_aggr;
+if (sizeof ac_aggr.$3)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$4=yes"
+else
+  eval "$4=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$4
+              { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_member
+
 # ac_fn_c_check_type LINENO TYPE VAR INCLUDES
 # -------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
@@ -2346,63 +2403,6 @@ $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_decl
-
-# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
-# ----------------------------------------------------
-# Tries to find if the field MEMBER exists in type AGGR, after including
-# INCLUDES, setting cache variable VAR accordingly.
-ac_fn_c_check_member ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
-$as_echo_n "checking for $2.$3... " >&6; }
-if { as_var=$4; eval "test \"\${$as_var+set}\" = set"; }; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (sizeof ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  eval "$4=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$4
-              { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-
-} # ac_fn_c_check_member
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -11440,6 +11440,42 @@ $as_echo "$LIBIPT" >&6; }
       { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: libipt is missing or unusable; some features may be unavailable." >&5
 $as_echo "$as_me: WARNING: libipt is missing or unusable; some features may be unavailable." >&2;}
     fi
+  else
+    save_LIBS=$LIBS
+    LIBS="$LIBS $LIBIPT"
+    for ac_func in pt_insn_event
+do :
+  ac_fn_c_check_func "$LINENO" "pt_insn_event" "ac_cv_func_pt_insn_event"
+if test "x$ac_cv_func_pt_insn_event" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_PT_INSN_EVENT 1
+_ACEOF
+
+fi
+done
+
+    ac_fn_c_check_member "$LINENO" "struct pt_insn" "enabled" "ac_cv_member_struct_pt_insn_enabled" "#include <intel-pt.h>
+"
+if test "x$ac_cv_member_struct_pt_insn_enabled" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_PT_INSN_ENABLED 1
+_ACEOF
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct pt_insn" "resynced" "ac_cv_member_struct_pt_insn_resynced" "#include <intel-pt.h>
+"
+if test "x$ac_cv_member_struct_pt_insn_resynced" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_PT_INSN_RESYNCED 1
+_ACEOF
+
+
+fi
+
+    LIBS=$save_LIBS
   fi
 fi
 

diff --git a/gdb/configure.ac b/gdb/configure.ac
index fd11cf0237b137f7c9e05c5c444acacfc064ea6f..10d2d10b12843dfbb5a20ae3adf3ebbe280ec32b 100644 (file)
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1272,6 +1272,13 @@ else
     else
       AC_MSG_WARN([libipt is missing or unusable; some features may be unavailable.])
     fi
+  else
+    save_LIBS=$LIBS
+    LIBS="$LIBS $LIBIPT"
+    AC_CHECK_FUNCS(pt_insn_event)
+    AC_CHECK_MEMBERS([struct pt_insn.enabled, struct pt_insn.resynced], [], [],
+                     [#include <intel-pt.h>])
+    LIBS=$save_LIBS
   fi
 fi