Add a --with-oprofile flag to configure, which uses OProfile's agent
library to tell it the addresses of JITted functions. For a
particular program, this changes the opreport -l output from:
samples % image name symbol name
48182 98.9729 anon (tgid:19412 range:0x7f12ccaab000-0x7f12cdaab000) anon (tgid:19412 range:0x7f12ccaab000-0x7f12cdaab000)
11 0.0226 libstdc++.so.6.0.9 /usr/lib/libstdc++.so.6.0.9
to:
samples % image name symbol name
24565 60.7308 19814.jo fib_left
15365 37.9861 19814.jo fib_right
22 0.0544 ld-2.7.so do_lookup_x
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75279 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index b3940f0..71afc3a 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -922,6 +922,43 @@
AC_DEFINE_UNQUOTED([USE_UDIS86],$USE_UDIS86,
[Define if use udis86 library])
+dnl Allow OProfile support for JIT output.
+AC_ARG_WITH(oprofile,
+ AS_HELP_STRING([--with-oprofile=<prefix>],
+ [Tell OProfile >= 0.9.4 how to symbolize JIT output]),
+ [
+ AC_SUBST(USE_OPROFILE, [1])
+ case "$withval" in
+ /usr|yes) llvm_cv_oppath=/usr/lib/oprofile ;;
+ *) llvm_cv_oppath="${withval}/lib/oprofile"
+ CPPFLAGS="-I${withval}/include";;
+ esac
+ LIBS="$LIBS -L${llvm_cv_oppath} -Wl,-rpath,${llvm_cv_oppath}"
+ AC_SEARCH_LIBS(op_open_agent, opagent, [], [
+ echo "Error! You need to have libopagent around."
+ exit -1
+ ])
+ AC_CHECK_HEADER([opagent.h], [], [
+ echo "Error! You need to have opagent.h around."
+ exit -1
+ ])
+ ],
+ [
+ llvm_cv_old_LIBS="$LIBS"
+ LIBS="$LIBS -L/usr/lib/oprofile -Wl,-rpath,/usr/lib/oprofile"
+ dnl If either the library or header aren't present, omit oprofile support.
+ AC_SEARCH_LIBS(op_open_agent, opagent,
+ [AC_SUBST(USE_OPROFILE, [1])],
+ [LIBS="$llvm_cv_old_LIBS"
+ AC_SUBST(USE_OPROFILE, [0])])
+ AC_CHECK_HEADER([opagent.h], [], [
+ LIBS="$llvm_cv_old_LIBS"
+ AC_SUBST(USE_OPROFILE, [0])
+ ])
+ ])
+AC_DEFINE_UNQUOTED([USE_OPROFILE],$USE_OPROFILE,
+ [Define if we have the oprofile JIT-support library])
+
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 6: Check for header files