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[PATCH 3/4] Add libgomp plugin for Intel MIC
- From: Ilya Verbin <iverbin at gmail dot com>
- To: Jakub Jelinek <jakub at redhat dot com>, gcc-patches at gcc dot gnu dot org
- Cc: Kirill Yukhin <kirill dot yukhin at gmail dot com>, Andrey Turetskiy <andrey dot turetskiy at gmail dot com>
- Date: Tue, 21 Oct 2014 21:24:13 +0400
- Subject: [PATCH 3/4] Add libgomp plugin for Intel MIC
- Authentication-results: sourceware.org; auth=none
- References: <20141021171323 dot GA47586 at msticlxl57 dot ims dot intel dot com>
Hello,
This patch contains a plugin for libgomp and appropriate changes for makefiles.
The plugin uses liboffloadmic_host.so to interact with the device (or with an
emulator). Also the patch contains offload_target_main executable, which is the
corresponding target side part of a libgomp plugin, and it uses
liboffloadmic_target.so.
The plugin builds automatically with liboffloadmic.
Autogenerated files are skipped. Is it ok for trunk?
Thanks,
-- Ilya
2014-10-21 Ilya Verbin <ilya.verbin@intel.com>
Andrey Turetskiy <andrey.turetskiy@intel.com>
liboffloadmic/
* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac: Add subdirectory 'plugin'.
* plugin/Makefile.am: New file.
* plugin/Makefile.in: New file, generated by automake.
* plugin/aclocal.m4: New file, generated by aclocal.
* plugin/configure: New file, generated by autoconf.
* plugin/configure.ac: New file.
* plugin/libgomp-plugin-intelmic.cpp: New file.
* plugin/offload_target_main.cpp: New file.
---
diff --git a/liboffloadmic/configure.ac b/liboffloadmic/configure.ac
index fb575b3..81fae8f 100644
--- a/liboffloadmic/configure.ac
+++ b/liboffloadmic/configure.ac
@@ -42,6 +42,7 @@ AC_PROG_CC
AC_PROG_CXX
AC_CONFIG_FILES([Makefile liboffloadmic_host.spec liboffloadmic_target.spec])
AM_ENABLE_MULTILIB(, ..)
+AC_CONFIG_SUBDIRS(plugin)
AC_FUNC_ALLOCA
AC_CHECK_HEADERS([mm_malloc.h], [], [AC_MSG_ERROR(["Couldn't find mm_malloc.h"])])
AC_CHECK_FUNCS([__secure_getenv secure_getenv])
diff --git a/liboffloadmic/plugin/Makefile.am b/liboffloadmic/plugin/Makefile.am
new file mode 100644
index 0000000..0baf70d
--- /dev/null
+++ b/liboffloadmic/plugin/Makefile.am
@@ -0,0 +1,123 @@
+# Plugin for offload execution on Intel MIC devices.
+#
+# Copyright (C) 2014 Free Software Foundation, Inc.
+#
+# Contributed by Ilya Verbin <ilya.verbin@intel.com> and
+# Andrey Turetskiy <andrey.turetskiy@intel.com>.
+#
+# This file is part of the GNU OpenMP Library (libgomp).
+#
+# Libgomp is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+# more details.
+#
+# Under Section 7 of GPL version 3, you are granted additional
+# permissions described in the GCC Runtime Library Exception, version
+# 3.1, as published by the Free Software Foundation.
+#
+# You should have received a copy of the GNU General Public License and
+# a copy of the GCC Runtime Library Exception along with this program;
+# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+# <http://www.gnu.org/licenses/>.
+
+
+AUTOMAKE_OPTIONS = foreign
+ACLOCAL_AMFLAGS = -I ../.. -I ../../config
+
+# Directories
+build_dir = $(top_builddir)
+source_dir = $(top_srcdir)
+coi_inc_dir = $(top_srcdir)/../include/coi
+myo_inc_dir = $(top_srcdir)/../include/myo
+libgomp_src_dir = $(top_srcdir)/../../libgomp
+libgomp_dir = $(build_dir)/../../libgomp
+liboffload_src_dir = $(top_srcdir)/../runtime
+liboffload_dir = $(top_builddir)/..
+
+# May be used by toolexeclibdir.
+gcc_version := $(shell cat $(top_srcdir)/../../gcc/BASE-VER)
+libsubincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/include
+# Search for main_target_image.h in these directories
+target_prefix_dir = $(libdir)/gcc/$(accel_target)/$(gcc_version)$(MULTISUBDIR)
+target_build_dir = $(accel_search_dir)/$(accel_target)$(MULTISUBDIR)/liboffloadmic/plugin
+target_install_dir = $(accel_search_dir)/lib/gcc/$(accel_target)/$(gcc_version)$(MULTISUBDIR)
+
+if PLUGIN_HOST
+ toolexeclib_LTLIBRARIES = libgomp-plugin-intelmic.la
+ libgomp_plugin_intelmic_la_SOURCES = libgomp-plugin-intelmic.cpp
+ libgomp_plugin_intelmic_la_CPPFLAGS = $(CPPFLAGS) -DLINUX -DCOI_LIBRARY_VERSION=2 -DMYO_SUPPORT -DOFFLOAD_DEBUG=1 -DSEP_SUPPORT -DTIMING_SUPPORT -DHOST_LIBRARY=1 -I$(coi_inc_dir) -I$(myo_inc_dir) -I$(liboffload_src_dir) -I$(libgomp_src_dir) -I$(libgomp_dir) -I$(target_prefix_dir)/include -I$(target_build_dir) -I$(target_install_dir)/include
+ libgomp_plugin_intelmic_la_LDFLAGS = -L$(liboffload_dir)/.libs -loffloadmic_host -version-info 1:0:0
+else # PLUGIN_TARGET
+ plugin_includedir = $(libsubincludedir)
+ plugin_include_HEADERS = main_target_image.h
+ AM_CPPFLAGS = $(CPPFLAGS) -DLINUX -DCOI_LIBRARY_VERSION=2 -DMYO_SUPPORT -DOFFLOAD_DEBUG=1 -DSEP_SUPPORT -DTIMING_SUPPORT -DHOST_LIBRARY=0 -I$(coi_inc_dir) -I$(myo_inc_dir) -I$(liboffload_src_dir) -I$(libgomp_dir)
+ AM_CXXFLAGS = $(CXXFLAGS)
+ AM_LDFLAGS = -L$(liboffload_dir)/.libs -L$(libgomp_dir)/.libs -loffloadmic_target -lcoi_device -lmyo-service -lgomp -rdynamic
+endif
+
+main_target_image.h: offload_target_main
+ @echo -n "const int image_size = " > $@
+ @stat -c '%s' $< >> $@
+ @echo ";" >> $@
+ @echo "struct MainTargetImage {" >> $@
+ @echo " int64_t size;" >> $@
+ @echo " char name[sizeof \"offload_target_main\"];" >> $@
+ @echo " char data[image_size];" >> $@
+ @echo "};" >> $@
+ @echo "extern \"C\" const MainTargetImage main_target_image = {" >> $@
+ @echo " image_size, \"offload_target_main\"," >> $@
+ @cat $< | xxd -include >> $@
+ @echo "};" >> $@
+
+offload_target_main: $(liboffload_dir)/ofldbegin.o offload_target_main.o $(liboffload_dir)/ofldend.o
+ $(CXX) $(AM_LDFLAGS) $^ -o $@
+
+offload_target_main.o: offload_target_main.cpp
+ $(CXX) $(AM_CXXFLAGS) $(AM_CPPFLAGS) -c $< -o $@
+
+# Work around what appears to be a GNU make bug handling MAKEFLAGS
+# values defined in terms of make variables, as is the case for CC and
+# friends when we are called from the top level Makefile.
+AM_MAKEFLAGS = \
+ "AR_FLAGS=$(AR_FLAGS)" \
+ "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+ "CFLAGS=$(CFLAGS)" \
+ "CXXFLAGS=$(CXXFLAGS)" \
+ "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
+ "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
+ "INSTALL=$(INSTALL)" \
+ "INSTALL_DATA=$(INSTALL_DATA)" \
+ "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
+ "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
+ "JC1FLAGS=$(JC1FLAGS)" \
+ "LDFLAGS=$(LDFLAGS)" \
+ "LIBCFLAGS=$(LIBCFLAGS)" \
+ "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
+ "MAKE=$(MAKE)" \
+ "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
+ "PICFLAG=$(PICFLAG)" \
+ "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
+ "SHELL=$(SHELL)" \
+ "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+ "exec_prefix=$(exec_prefix)" \
+ "infodir=$(infodir)" \
+ "libdir=$(libdir)" \
+ "prefix=$(prefix)" \
+ "includedir=$(includedir)" \
+ "AR=$(AR)" \
+ "AS=$(AS)" \
+ "LD=$(LD)" \
+ "LIBCFLAGS=$(LIBCFLAGS)" \
+ "NM=$(NM)" \
+ "PICFLAG=$(PICFLAG)" \
+ "RANLIB=$(RANLIB)" \
+ "DESTDIR=$(DESTDIR)"
+
+MAKEOVERRIDES =
+
diff --git a/liboffloadmic/plugin/configure.ac b/liboffloadmic/plugin/configure.ac
new file mode 100644
index 0000000..283faad
--- /dev/null
+++ b/liboffloadmic/plugin/configure.ac
@@ -0,0 +1,135 @@
+# Plugin for offload execution on Intel MIC devices.
+#
+# Copyright (C) 2014 Free Software Foundation, Inc.
+#
+# Contributed by Andrey Turetskiy <andrey.turetskiy@intel.com>.
+#
+# This file is part of the GNU OpenMP Library (libgomp).
+#
+# Libgomp is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+# more details.
+#
+# Under Section 7 of GPL version 3, you are granted additional
+# permissions described in the GCC Runtime Library Exception, version
+# 3.1, as published by the Free Software Foundation.
+#
+# You should have received a copy of the GNU General Public License and
+# a copy of the GCC Runtime Library Exception along with this program;
+# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+# <http://www.gnu.org/licenses/>.
+
+# Process this file with autoconf to produce a configure script, like so:
+# aclocal -I ../.. -I ../../config && autoconf && automake
+
+AC_PREREQ([2.64])
+AC_INIT([Intel MIC Offload Plugin], [1.0], ,[libgomp-plugin-intelmic])
+
+AC_CONFIG_AUX_DIR(../..)
+
+AC_CANONICAL_SYSTEM
+target_alias=${target_alias-$host_alias}
+AC_SUBST(target_alias)
+
+AM_INIT_AUTOMAKE([1.9.0 foreign no-dist])
+
+AM_MAINTAINER_MODE
+
+AC_PROG_CC
+AC_PROG_CXX
+AC_CONFIG_FILES([Makefile])
+AM_ENABLE_MULTILIB(, ../..)
+
+if test "${multilib}" = "yes"; then
+ multilib_arg="--enable-multilib"
+else
+ multilib_arg=
+fi
+
+# Make sure liboffloadmic is enabled
+case "$enable_liboffloadmic" in
+ host | target)
+ ;;
+ *)
+ AC_MSG_ERROR([Liboffloadmic is disabled]) ;;
+esac
+AM_CONDITIONAL(PLUGIN_HOST, [test x"$enable_liboffloadmic" = xhost])
+
+# Get accel target and path to build or install tree of accel compiler
+accel_search_dir=
+accel_target=
+if test x"$enable_liboffloadmic" = xhost; then
+ for accel in `echo $enable_offload_targets | sed -e 's#,# #g'`; do
+ accel_name=`echo $accel | sed 's/=.*//'`
+ accel_dir=`echo $accel | grep '=' | sed 's/.*=//'`
+ case "$accel_name" in
+ *-intelmic-* | *-intelmicemul-*)
+ accel_target=$accel_name
+ accel_search_dir=$accel_dir
+ ;;
+ esac
+ done
+ if test x"$accel_target" = x; then
+ AC_MSG_ERROR([--enable-offload-targets does not contain intelmic target])
+ fi
+fi
+AC_SUBST(accel_search_dir)
+AC_SUBST(accel_target)
+
+AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
+AC_ARG_ENABLE([version-specific-runtime-libs],
+ AC_HELP_STRING([--enable-version-specific-runtime-libs],
+ [Specify that runtime libraries should be installed in a compiler-specific directory]),
+ [case "$enableval" in
+ yes) enable_version_specific_runtime_libs=yes ;;
+ no) enable_version_specific_runtime_libs=no ;;
+ *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
+ esac],
+ [enable_version_specific_runtime_libs=no])
+AC_MSG_RESULT($enable_version_specific_runtime_libs)
+
+
+# Calculate toolexeclibdir.
+# Also toolexecdir, though it's only used in toolexeclibdir.
+case ${enable_version_specific_runtime_libs} in
+ yes)
+ # Need the gcc compiler version to know where to install libraries
+ # and header files if --enable-version-specific-runtime-libs option
+ # is selected.
+ toolexecdir='$(libdir)/gcc/$(target_alias)'
+ toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
+ ;;
+ no)
+ if test -n "$with_cross_host" &&
+ test x"$with_cross_host" != x"no"; then
+ # Install a library built with a cross compiler in tooldir, not libdir.
+ toolexecdir='$(exec_prefix)/$(target_alias)'
+ toolexeclibdir='$(toolexecdir)/lib'
+ else
+ toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
+ toolexeclibdir='$(libdir)'
+ fi
+ multi_os_directory=`$CC -print-multi-os-directory`
+ case $multi_os_directory in
+ .) ;; # Avoid trailing /.
+ *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+ esac
+ ;;
+esac
+
+AC_LIBTOOL_DLOPEN
+AM_PROG_LIBTOOL
+# Forbid libtool to hardcode RPATH, because we want to be able to specify
+# library search directory using LD_LIBRARY_PATH
+hardcode_into_libs=no
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+# Must be last
+AC_OUTPUT
diff --git a/liboffloadmic/plugin/libgomp-plugin-intelmic.cpp b/liboffloadmic/plugin/libgomp-plugin-intelmic.cpp
new file mode 100644
index 0000000..dbbeeaf
--- /dev/null
+++ b/liboffloadmic/plugin/libgomp-plugin-intelmic.cpp
@@ -0,0 +1,442 @@
+/* Plugin for offload execution on Intel MIC devices.
+
+ Copyright (C) 2014 Free Software Foundation, Inc.
+
+ Contributed by Ilya Verbin <ilya.verbin@intel.com>.
+
+ This file is part of the GNU OpenMP Library (libgomp).
+
+ Libgomp is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Host side part of a libgomp plugin. */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <utility>
+#include <vector>
+#include <libgomp_target.h>
+#include "compiler_if_host.h"
+#include "main_target_image.h"
+
+#define LD_LIBRARY_PATH_ENV "LD_LIBRARY_PATH"
+#define MIC_LD_LIBRARY_PATH_ENV "MIC_LD_LIBRARY_PATH"
+
+#ifdef DEBUG
+#define TRACE(...) \
+{ \
+fprintf (stderr, "HOST:\t%s:%s ", __FILE__, __FUNCTION__); \
+fprintf (stderr, __VA_ARGS__); \
+fprintf (stderr, "\n"); \
+}
+#else
+#define TRACE { }
+#endif
+
+
+static VarDesc vd_host2tgt = {
+ { 1, 1 }, /* dst, src */
+ { 1, 0 }, /* in, out */
+ 1, /* alloc_if */
+ 1, /* free_if */
+ 4, /* align */
+ 0, /* mic_offset */
+ { 0, 0, 0, 0, 0, 0, 0, 0 }, /* is_static, is_static_dstn, has_length,
+ is_stack_buf, sink_addr, alloc_disp,
+ is_noncont_src, is_noncont_dst */
+ 0, /* offset */
+ 0, /* size */
+ 1, /* count */
+ 0, /* alloc */
+ 0, /* into */
+ 0 /* ptr */
+};
+
+static VarDesc vd_tgt2host = {
+ { 1, 1 }, /* dst, src */
+ { 0, 1 }, /* in, out */
+ 1, /* alloc_if */
+ 1, /* free_if */
+ 4, /* align */
+ 0, /* mic_offset */
+ { 0, 0, 0, 0, 0, 0, 0, 0 }, /* is_static, is_static_dstn, has_length,
+ is_stack_buf, sink_addr, alloc_disp,
+ is_noncont_src, is_noncont_dst */
+ 0, /* offset */
+ 0, /* size */
+ 1, /* count */
+ 0, /* alloc */
+ 0, /* into */
+ 0 /* ptr */
+};
+
+
+/* Total number of shared libraries with offloading to Intel MIC. */
+static int num_libraries;
+
+/* Pointers to the descriptors, containing pointers to host-side tables and to
+ target images. */
+static std::vector< std::pair<void *, void *> > lib_descrs;
+
+/* Mutex to control parallel plugin calls. */
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+
+/* Add path specified in LD_LIBRARY_PATH to MIC_LD_LIBRARY_PATH, which is
+ required by liboffloadmic. */
+__attribute__((constructor))
+static void
+set_mic_lib_path (void)
+{
+ const char *ld_lib_path = getenv (LD_LIBRARY_PATH_ENV);
+ const char *mic_lib_path = getenv (MIC_LD_LIBRARY_PATH_ENV);
+ char *mic_lib_path_new;
+
+ if (!ld_lib_path)
+ return;
+
+ mic_lib_path_new = (char *) malloc ((mic_lib_path ? strlen (mic_lib_path) : 0)
+ + strlen (ld_lib_path) + 2);
+
+ if (!mic_lib_path)
+ strcpy (mic_lib_path_new, ld_lib_path);
+ else
+ sprintf (mic_lib_path_new, "%s:%s", mic_lib_path, ld_lib_path);
+ setenv (MIC_LD_LIBRARY_PATH_ENV, mic_lib_path_new, 1);
+ free (mic_lib_path_new);
+}
+
+extern "C" enum offload_target_type
+GOMP_OFFLOAD_get_type (void)
+{
+ enum offload_target_type res = OFFLOAD_TARGET_TYPE_INTEL_MIC;
+ TRACE ("(): return %d", res);
+ return res;
+}
+
+extern "C" int
+GOMP_OFFLOAD_get_num_devices (void)
+{
+ int res = _Offload_number_of_devices ();
+ TRACE ("(): return %d", res);
+ return res;
+}
+
+/* This should be called from every shared library with offloading. */
+extern "C" void
+GOMP_OFFLOAD_register_image (void *host_table, void *target_image)
+{
+ TRACE ("(host_table = %p, target_image = %p)", host_table, target_image);
+
+ if (num_libraries >= 1000)
+ {
+ fprintf (stderr,
+ "%s: The number of loaded shared libraries is over 1000!\n",
+ __FILE__);
+ exit (1);
+ }
+
+ lib_descrs.push_back (std::make_pair (host_table, target_image));
+ num_libraries++;
+}
+
+static void
+offload (const char *file, uint64_t line, int device, const char *name,
+ int num_vars, VarDesc *vars, VarDesc2 *vars2)
+{
+ OFFLOAD ofld = __offload_target_acquire1 (&device, file, line);
+ if (ofld)
+ __offload_offload1 (ofld, name, 0, num_vars, vars, vars2, 0, NULL, NULL);
+ else
+ {
+ fprintf (stderr, "%s:%d: Offload target acquire failed\n", file, line);
+ exit (1);
+ }
+}
+
+static int first_init = 1;
+
+/* Load offload_target_main on target. */
+extern "C" void
+GOMP_OFFLOAD_init_device (int device)
+{
+ TRACE ("");
+ pthread_mutex_lock (&mutex);
+ if (first_init)
+ {
+ __offload_register_image (&main_target_image);
+ first_init = 0;
+ }
+ pthread_mutex_unlock (&mutex);
+ offload (__FILE__, __LINE__, device, "__offload_target_init_proc", 0,
+ NULL, NULL);
+}
+
+static void
+get_target_table (int device, int &num_funcs, int &num_vars, void **&table)
+{
+ VarDesc vd1[2] = { vd_tgt2host, vd_tgt2host };
+ vd1[0].ptr = &num_funcs;
+ vd1[0].size = sizeof (num_funcs);
+ vd1[1].ptr = &num_vars;
+ vd1[1].size = sizeof (num_vars);
+ VarDesc2 vd1g[2] = { { "num_funcs", 0 }, { "num_vars", 0 } };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_table_p1", 2,
+ vd1, vd1g);
+
+ int table_size = num_funcs + 2 * num_vars;
+ if (table_size > 0)
+ {
+ table = new void * [table_size];
+
+ VarDesc vd2;
+ vd2 = vd_tgt2host;
+ vd2.ptr = table;
+ vd2.size = table_size * sizeof (void *);
+ VarDesc2 vd2g = { "table", 0 };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_table_p2", 1,
+ &vd2, &vd2g);
+ }
+}
+
+static void
+load_lib_and_get_table (int device, int lib_num, mapping_table *&table,
+ int &table_size)
+{
+ /* 1000 shared libraries with offloading ought to be enough for anybody. */
+ struct TargetImage {
+ int64_t size;
+ char name[sizeof "lib000.so"];
+ char data[];
+ } __attribute__ ((packed));
+
+ void ***host_table_descr = (void ***) lib_descrs[lib_num].first;
+ void **host_func_start = host_table_descr[0];
+ void **host_func_end = host_table_descr[1];
+ void **host_var_start = host_table_descr[2];
+ void **host_var_end = host_table_descr[3];
+
+ void **target_image_descr = (void **) lib_descrs[lib_num].second;
+ void *image_start = target_image_descr[0];
+ void *image_end = target_image_descr[1];
+
+ TRACE ("() host_table_descr { %p, %p, %p, %p }", host_func_start,
+ host_func_end, host_var_start, host_var_end);
+ TRACE ("() target_image_descr { %p, %p }", image_start, image_end);
+
+ int64_t image_size = (uintptr_t) image_end - (uintptr_t) image_start;
+ TargetImage *image
+ = (TargetImage *) malloc (sizeof (int64_t) + sizeof ("lib000.so")
+ + image_size);
+ image->size = image_size;
+ sprintf (image->name, "lib%03d.so", lib_num);
+ memcpy (image->data, image_start, image->size);
+
+ TRACE ("() __offload_register_image %s { %p, %d }",
+ image->name, image_start, image->size);
+ __offload_register_image (image);
+
+ int tgt_num_funcs = 0;
+ int tgt_num_vars = 0;
+ void **tgt_table = NULL;
+ get_target_table (device, tgt_num_funcs, tgt_num_vars, tgt_table);
+ free (image);
+
+ /* The func table contains only addresses, the var table contains addresses
+ and corresponding sizes. */
+ int host_num_funcs = host_func_end - host_func_start;
+ int host_num_vars = (host_var_end - host_var_start) / 2;
+ TRACE ("() host_num_funcs = %d, tgt_num_funcs = %d",
+ host_num_funcs, tgt_num_funcs);
+ TRACE ("() host_num_vars = %d, tgt_num_vars = %d",
+ host_num_vars, tgt_num_vars);
+ if (host_num_funcs != tgt_num_funcs)
+ {
+ fprintf (stderr, "%s: Can't map target functions\n", __FILE__);
+ exit (1);
+ }
+ if (host_num_vars != tgt_num_vars)
+ {
+ fprintf (stderr, "%s: Can't map target variables\n", __FILE__);
+ exit (1);
+ }
+
+ table = (mapping_table *) realloc (table, (table_size + host_num_funcs
+ + host_num_vars)
+ * sizeof (mapping_table));
+ if (table == NULL)
+ {
+ fprintf (stderr, "%s: Can't allocate memory\n", __FILE__);
+ exit (1);
+ }
+
+ for (int i = 0; i < host_num_funcs; i++)
+ {
+ mapping_table t;
+ t.host_start = (uintptr_t) host_func_start[i];
+ t.host_end = t.host_start + 1;
+ t.tgt_start = (uintptr_t) tgt_table[i];
+ t.tgt_end = t.tgt_start + 1;
+
+ TRACE ("() lib %d, func %d:\t0x%llx -- 0x%llx",
+ lib_num, i, t.host_start, t.tgt_start);
+
+ table[table_size++] = t;
+ }
+
+ for (int i = 0; i < host_num_vars * 2; i += 2)
+ {
+ mapping_table t;
+ t.host_start = (uintptr_t) host_var_start[i];
+ t.host_end = t.host_start + (uintptr_t) host_var_start[i+1];
+ t.tgt_start = (uintptr_t) tgt_table[tgt_num_funcs+i];
+ t.tgt_end = t.tgt_start + (uintptr_t) tgt_table[tgt_num_funcs+i+1];
+
+ TRACE ("() lib %d, var %d:\t0x%llx (%d) -- 0x%llx (%d)", lib_num, i/2,
+ t.host_start, t.host_end - t.host_start,
+ t.tgt_start, t.tgt_end - t.tgt_start);
+
+ table[table_size++] = t;
+ }
+
+ delete [] tgt_table;
+}
+
+extern "C" int
+GOMP_OFFLOAD_get_table (int device, void *result)
+{
+ TRACE ("(num_libraries = %d)", num_libraries);
+
+ mapping_table *table = NULL;
+ int table_size = 0;
+
+ for (int i = 0; i < num_libraries; i++)
+ load_lib_and_get_table (device, i, table, table_size);
+
+ *(void **) result = table;
+ return table_size;
+}
+
+extern "C" void *
+GOMP_OFFLOAD_alloc (int device, size_t size)
+{
+ TRACE ("(size = %d)", size);
+
+ void *tgt_ptr;
+ VarDesc vd1[2] = { vd_host2tgt, vd_tgt2host };
+ vd1[0].ptr = &size;
+ vd1[0].size = sizeof (size);
+ vd1[1].ptr = &tgt_ptr;
+ vd1[1].size = sizeof (void *);
+ VarDesc2 vd1g[2] = { { "size", 0 }, { "tgt_ptr", 0 } };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_alloc", 2, vd1, vd1g);
+
+ return tgt_ptr;
+}
+
+extern "C" void
+GOMP_OFFLOAD_free (int device, void *tgt_ptr)
+{
+ TRACE ("(tgt_ptr = %p)", tgt_ptr);
+
+ VarDesc vd1 = vd_host2tgt;
+ vd1.ptr = &tgt_ptr;
+ vd1.size = sizeof (void *);
+ VarDesc2 vd1g = { "tgt_ptr", 0 };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_free", 1, &vd1, &vd1g);
+}
+
+extern "C" void *
+GOMP_OFFLOAD_host2dev (int device, void *tgt_ptr, const void *host_ptr,
+ size_t size)
+{
+ TRACE ("(tgt_ptr = %p, host_ptr = %p, size = %d)", tgt_ptr, host_ptr, size);
+ if (!size)
+ return tgt_ptr;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &tgt_ptr;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &size;
+ vd1[1].size = sizeof (size);
+ VarDesc2 vd1g[2] = { { "tgt_ptr", 0 }, { "size", 0 } };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_host2tgt_p1", 2,
+ vd1, vd1g);
+
+ VarDesc vd2 = vd_host2tgt;
+ vd2.ptr = (void *) host_ptr;
+ vd2.size = size;
+ VarDesc2 vd2g = { "var", 0 };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_host2tgt_p2", 1,
+ &vd2, &vd2g);
+
+ return tgt_ptr;
+}
+
+extern "C" void *
+GOMP_OFFLOAD_dev2host (int device, void *host_ptr, const void *tgt_ptr,
+ size_t size)
+{
+ TRACE ("(host_ptr = %p, tgt_ptr = %p, size = %d)", host_ptr, tgt_ptr, size);
+ if (!size)
+ return host_ptr;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &tgt_ptr;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &size;
+ vd1[1].size = sizeof (size);
+ VarDesc2 vd1g[2] = { { "tgt_ptr", 0 }, { "size", 0 } };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_tgt2host_p1", 2,
+ vd1, vd1g);
+
+ VarDesc vd2 = vd_tgt2host;
+ vd2.ptr = (void *) host_ptr;
+ vd2.size = size;
+ VarDesc2 vd2g = { "var", 0 };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_tgt2host_p2", 1,
+ &vd2, &vd2g);
+
+ return host_ptr;
+}
+
+extern "C" void
+GOMP_OFFLOAD_run (int device, void *tgt_fn, void *tgt_vars)
+{
+ TRACE ("(tgt_fn = %p, tgt_vars = %p)", tgt_fn, tgt_vars);
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &tgt_fn;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &tgt_vars;
+ vd1[1].size = sizeof (void *);
+ VarDesc2 vd1g[2] = { { "tgt_fn", 0 }, { "tgt_vars", 0 } };
+
+ offload (__FILE__, __LINE__, device, "__offload_target_run", 2, vd1, vd1g);
+}
diff --git a/liboffloadmic/plugin/offload_target_main.cpp b/liboffloadmic/plugin/offload_target_main.cpp
new file mode 100644
index 0000000..4a2778e
--- /dev/null
+++ b/liboffloadmic/plugin/offload_target_main.cpp
@@ -0,0 +1,366 @@
+/* Plugin for offload execution on Intel MIC devices.
+
+ Copyright (C) 2014 Free Software Foundation, Inc.
+
+ Contributed by Ilya Verbin <ilya.verbin@intel.com>.
+
+ This file is part of the GNU OpenMP Library (libgomp).
+
+ Libgomp is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Target side part of a libgomp plugin. */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "compiler_if_target.h"
+
+
+#ifdef DEBUG
+#define TRACE(...) \
+{ \
+fprintf (stderr, "TARGET:\t%s:%s ", __FILE__, __FUNCTION__); \
+fprintf (stderr, __VA_ARGS__); \
+fprintf (stderr, "\n"); \
+}
+#else
+#define TRACE { }
+#endif
+
+
+static VarDesc vd_host2tgt = {
+ { 1, 1 }, /* dst, src */
+ { 1, 0 }, /* in, out */
+ 1, /* alloc_if */
+ 1, /* free_if */
+ 4, /* align */
+ 0, /* mic_offset */
+ { 0, 0, 0, 0, 0, 0, 0, 0 }, /* is_static, is_static_dstn, has_length,
+ is_stack_buf, sink_addr, alloc_disp,
+ is_noncont_src, is_noncont_dst */
+ 0, /* offset */
+ 0, /* size */
+ 1, /* count */
+ 0, /* alloc */
+ 0, /* into */
+ 0 /* ptr */
+};
+
+static VarDesc vd_tgt2host = {
+ { 1, 1 }, /* dst, src */
+ { 0, 1 }, /* in, out */
+ 1, /* alloc_if */
+ 1, /* free_if */
+ 4, /* align */
+ 0, /* mic_offset */
+ { 0, 0, 0, 0, 0, 0, 0, 0 }, /* is_static, is_static_dstn, has_length,
+ is_stack_buf, sink_addr, alloc_disp,
+ is_noncont_src, is_noncont_dst */
+ 0, /* offset */
+ 0, /* size */
+ 1, /* count */
+ 0, /* alloc */
+ 0, /* into */
+ 0 /* ptr */
+};
+
+/* Pointer to the descriptor of the last loaded shared library. */
+static void *last_loaded_library = NULL;
+
+/* Pointer and size of the variable, used in __offload_target_host2tgt_p[12]
+ and __offload_target_tgt2host_p[12]. */
+static void *last_var_ptr = NULL;
+static int last_var_size = 0;
+
+
+/* Override the corresponding functions from libgomp. */
+extern "C" int
+omp_is_initial_device (void) __GOMP_NOTHROW
+{
+ return 0;
+}
+
+extern "C" int32_t
+omp_is_initial_device_ (void)
+{
+ return omp_is_initial_device ();
+}
+
+
+/* Dummy function needed for the initialization of target process during the
+ first call to __offload_offload1. */
+static void
+__offload_target_init_proc (OFFLOAD ofldt)
+{
+ TRACE ("");
+}
+
+/* Collect addresses of the offload functions and of the global variables from
+ the library descriptor and send them to host.
+ Part 1: Send num_funcs and num_vars to host. */
+static void
+__offload_target_table_p1 (OFFLOAD ofldt)
+{
+ void ***lib_descr = (void ***) last_loaded_library;
+
+ if (lib_descr == NULL)
+ {
+ TRACE ("");
+ fprintf (stderr, "Error! No shared libraries loaded on target.\n");
+ return;
+ }
+
+ void **func_table_begin = lib_descr[0];
+ void **func_table_end = lib_descr[1];
+ void **var_table_begin = lib_descr[2];
+ void **var_table_end = lib_descr[3];
+
+ /* The func table contains only addresses, the var table contains addresses
+ and corresponding sizes. */
+ int num_funcs = func_table_end - func_table_begin;
+ int num_vars = (var_table_end - var_table_begin) / 2;
+ TRACE ("(num_funcs = %d, num_vars = %d)", num_funcs, num_vars);
+
+ VarDesc vd1[2] = { vd_tgt2host, vd_tgt2host };
+ vd1[0].ptr = &num_funcs;
+ vd1[0].size = sizeof (num_funcs);
+ vd1[1].ptr = &num_vars;
+ vd1[1].size = sizeof (num_vars);
+ VarDesc2 vd2[2] = { { "num_funcs", 0 }, { "num_vars", 0 } };
+
+ __offload_target_enter (ofldt, 2, vd1, vd2);
+ __offload_target_leave (ofldt);
+}
+
+/* Part 2: Send the table with addresses to host. */
+static void
+__offload_target_table_p2 (OFFLOAD ofldt)
+{
+ void ***lib_descr = (void ***) last_loaded_library;
+ void **func_table_begin = lib_descr[0];
+ void **func_table_end = lib_descr[1];
+ void **var_table_begin = lib_descr[2];
+ void **var_table_end = lib_descr[3];
+
+ int num_funcs = func_table_end - func_table_begin;
+ int num_vars = (var_table_end - var_table_begin) / 2;
+ int table_size = (num_funcs + 2 * num_vars) * sizeof (void *);
+ void **table = (void **) malloc (table_size);
+ TRACE ("(table_size = %d)", table_size);
+
+ VarDesc vd1;
+ vd1 = vd_tgt2host;
+ vd1.ptr = table;
+ vd1.size = table_size;
+ VarDesc2 vd2 = { "table", 0 };
+
+ __offload_target_enter (ofldt, 1, &vd1, &vd2);
+
+ void **p;
+ int i = 0;
+ for (p = func_table_begin; p < func_table_end; p++, i++)
+ table[i] = *p;
+
+ for (p = var_table_begin; p < var_table_end; p++, i++)
+ table[i] = *p;
+
+ __offload_target_leave (ofldt);
+ free (table);
+}
+
+/* Allocate size bytes and send a pointer to the allocated memory to host. */
+static void
+__offload_target_alloc (OFFLOAD ofldt)
+{
+ size_t size = 0;
+ void *ptr = NULL;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_tgt2host };
+ vd1[0].ptr = &size;
+ vd1[0].size = sizeof (size);
+ vd1[1].ptr = &ptr;
+ vd1[1].size = sizeof (void *);
+ VarDesc2 vd2[2] = { { "size", 0 }, { "ptr", 0 } };
+
+ __offload_target_enter (ofldt, 2, vd1, vd2);
+ ptr = malloc (size);
+ TRACE ("(size = %d): ptr = %p", size, ptr);
+ __offload_target_leave (ofldt);
+}
+
+/* Free the memory space pointed to by ptr. */
+static void
+__offload_target_free (OFFLOAD ofldt)
+{
+ void *ptr = 0;
+
+ VarDesc vd1 = vd_host2tgt;
+ vd1.ptr = &ptr;
+ vd1.size = sizeof (void *);
+ VarDesc2 vd2 = { "ptr", 0 };
+
+ __offload_target_enter (ofldt, 1, &vd1, &vd2);
+ TRACE ("(ptr = %p)", ptr);
+ free (ptr);
+ __offload_target_leave (ofldt);
+}
+
+/* Receive var_size bytes from host and store to var_ptr.
+ Part 1: Receive var_ptr and var_size from host. */
+static void
+__offload_target_host2tgt_p1 (OFFLOAD ofldt)
+{
+ void *var_ptr = NULL;
+ size_t var_size = 0;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &var_ptr;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &var_size;
+ vd1[1].size = sizeof (var_size);
+ VarDesc2 vd2[2] = { { "var_ptr", 0 }, { "var_size", 0 } };
+
+ __offload_target_enter (ofldt, 2, vd1, vd2);
+ TRACE ("(var_ptr = %p, var_size = %d)", var_ptr, var_size);
+ last_var_ptr = var_ptr;
+ last_var_size = var_size;
+ __offload_target_leave (ofldt);
+}
+
+/* Part 2: Receive the data from host. */
+static void
+__offload_target_host2tgt_p2 (OFFLOAD ofldt)
+{
+ TRACE ("(last_var_ptr = %p, last_var_size = %d)",
+ last_var_ptr, last_var_size);
+
+ VarDesc vd1 = vd_host2tgt;
+ vd1.ptr = last_var_ptr;
+ vd1.size = last_var_size;
+ VarDesc2 vd2 = { "var", 0 };
+
+ __offload_target_enter (ofldt, 1, &vd1, &vd2);
+ __offload_target_leave (ofldt);
+}
+
+/* Send var_size bytes from var_ptr to host.
+ Part 1: Receive var_ptr and var_size from host. */
+static void
+__offload_target_tgt2host_p1 (OFFLOAD ofldt)
+{
+ void *var_ptr = NULL;
+ size_t var_size = 0;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &var_ptr;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &var_size;
+ vd1[1].size = sizeof (var_size);
+ VarDesc2 vd2[2] = { { "var_ptr", 0 }, { "var_size", 0 } };
+
+ __offload_target_enter (ofldt, 2, vd1, vd2);
+ TRACE ("(var_ptr = %p, var_size = %d)", var_ptr, var_size);
+ last_var_ptr = var_ptr;
+ last_var_size = var_size;
+ __offload_target_leave (ofldt);
+}
+
+/* Part 2: Send the data to host. */
+static void
+__offload_target_tgt2host_p2 (OFFLOAD ofldt)
+{
+ TRACE ("(last_var_ptr = %p, last_var_size = %d)",
+ last_var_ptr, last_var_size);
+
+ VarDesc vd1 = vd_tgt2host;
+ vd1.ptr = last_var_ptr;
+ vd1.size = last_var_size;
+ VarDesc2 vd2 = { "var", 0 };
+
+ __offload_target_enter (ofldt, 1, &vd1, &vd2);
+ __offload_target_leave (ofldt);
+}
+
+/* Call offload function by the address fn_ptr and pass vars_ptr to it. */
+static void
+__offload_target_run (OFFLOAD ofldt)
+{
+ void *fn_ptr;
+ void *vars_ptr;
+
+ VarDesc vd1[2] = { vd_host2tgt, vd_host2tgt };
+ vd1[0].ptr = &fn_ptr;
+ vd1[0].size = sizeof (void *);
+ vd1[1].ptr = &vars_ptr;
+ vd1[1].size = sizeof (void *);
+ VarDesc2 vd2[2] = { { "fn_ptr", 0 }, { "vars_ptr", 0 } };
+
+ __offload_target_enter (ofldt, 2, vd1, vd2);
+ TRACE ("(fn_ptr = %p, vars_ptr = %p)", fn_ptr, vars_ptr);
+ void (*fn)(void *) = (void (*)(void *)) fn_ptr;
+ fn (vars_ptr);
+ __offload_target_leave (ofldt);
+}
+
+
+/* This should be called from every library with offloading. */
+extern "C" void
+target_register_lib (const void *target_table)
+{
+ TRACE ("(target_table = %p { %p, %p, %p, %p })", target_table,
+ ((void **) target_table)[0], ((void **) target_table)[1],
+ ((void **) target_table)[2], ((void **) target_table)[3]);
+
+ last_loaded_library = (void *) target_table;
+}
+
+/* Use __offload_target_main from liboffload. */
+int
+main (int argc, char **argv)
+{
+ __offload_target_main ();
+ return 0;
+}
+
+
+/* Register offload_target_main's functions in the liboffload. */
+
+struct Entry {
+ const char *name;
+ void *func;
+};
+
+#define REGISTER(f) \
+extern "C" const Entry __offload_target_##f##_$entry \
+__attribute__ ((section(".OffloadEntryTable."))) = { \
+ "__offload_target_"#f, \
+ (void *) __offload_target_##f \
+}
+REGISTER (init_proc);
+REGISTER (table_p1);
+REGISTER (table_p2);
+REGISTER (alloc);
+REGISTER (free);
+REGISTER (host2tgt_p1);
+REGISTER (host2tgt_p2);
+REGISTER (tgt2host_p1);
+REGISTER (tgt2host_p2);
+REGISTER (run);
+#undef REGISTER
--
1.7.1