add tool and tests for binding threads according to a set of locations

Author: ndenoyelle

config/hwloc_internal.m4

@@ -355,6 +355,34 @@ EOF
       AC_CHECK_FUNCS([clock_gettime])
     ])
 
+    # Check for ptrace support
+    hwloc_have_ptrace=1
+    AC_CHECK_HEADERS([sys/ptrace.h],, [hwloc_have_ptrace=0])
+    AC_CHECK_FUNCS([ptrace],, [hwloc_have_ptrace=0])
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 
+        #include "sys/ptrace.h"
+        int main(void){
+	  return ptrace(PTRACE_SEIZE,
+	                -1,
+			0,
+			(void*)(PTRACE_O_TRACECLONE|PTRACE_O_TRACEFORK));
+	}
+      ]])],, [hwloc_have_ptrace=0])      
+    AM_CONDITIONAL([HWLOC_HAVE_PTRACE],[test $hwloc_have_ptrace -eq 1])
+    AC_DEFINE_UNQUOTED([HWLOC_HAVE_PTRACE], [$hwloc_have_ptrace], [Whether ptrace is present and supports PTRACE_SEIZE or not])
+
+    # Check if syscall gettid is available.
+    hwloc_have_sys_gettid=1
+    AC_CHECK_HEADERS([sys/syscall.h],, [hwloc_have_sys_gettid=0])
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+       #include "sys/syscall.h"
+       #ifndef SYS_gettid
+       #error "syscall SYS_gettid not found"
+       #endif
+       int main(void){ return syscall(SYS_gettid) > 0;}
+    ]])],,[hwloc_have_sys_gettid=0])
+    AC_DEFINE_UNQUOTED([HWLOC_HAVE_SYS_GETTID], [$hwloc_have_sys_gettid], [Whether syscall header is present and SYS_gettid macro is defined or not])
+
     # Only generate this if we're building the utilities
     # Even the netloc library Makefile is here because
     # we don't embed libnetloc yet, it's useless without tools
@@ -385,7 +413,11 @@ AC_DEFUN([HWLOC_SETUP_TESTS],[
 ###
 EOF
 
-    AC_CHECK_LIB([pthread], [pthread_self], [hwloc_have_pthread=yes])
+    # Check thread support.
+    AC_CHECK_LIB([pthread], [pthread_self], [hwloc_have_pthread=1], [hwloc_have_pthread=0])
+    AC_DEFINE_UNQUOTED([HWLOC_HAVE_PTHREAD], [$hwloc_have_pthread], [Whether we have the pthread library or not])
+    AM_CONDITIONAL([HWLOC_HAVE_PTHREAD], [test $hwloc_have_pthread -eq 1]) AC_CHECK_LIB([pthread], [pthread_self], [hwloc_have_pthread=yes])
+    AC_OPENMP
 
     HWLOC_PKG_CHECK_MODULES([NUMA], [numa], [numa_available], [numa.h],
                             [hwloc_have_linux_libnuma=yes],

utils/hwloc/Makefile.am

@@ -169,3 +169,24 @@ endif HWLOC_HAVE_LINUX
 
 distclean-local:
 	rm -f $(nodist_man_MANS)
+
+# Build hwloc-thread-bind
+if HWLOC_HAVE_PTRACE
+if HWLOC_HAVE_PTHREAD
+AM_LDFLAGS+=-lpthread
+endif #HWLOC_HAVE_PHREAD
+noinst_LTLIBRARIES+=libhwloc-thread-bind.la
+libhwloc_thread_bind_la_SOURCES=hwloc-thread-bind-utils.c hwloc-thread-bind.h
+LIBDADD=$(HWLOC_top_builddir)/hwloc/libhwloc.la
+
+bin_PROGRAMS += hwloc-thread-bind
+hwloc_thread_bind_SOURCES = \
+	hwloc-thread-bind.c \
+	hwloc-thread-bind.h
+LDADD+=$(HWLOC_top_builddir)/hwloc/libhwloc.la
+LDADD+=libhwloc-thread-bind.la
+check_PROGRAMS=test-hwloc-thread-bind
+if !HWLOC_HAVE_MINGW32
+TESTS+=test-hwloc-thread-bind
+endif #!HWLOC_HAVE_MINGW32
+endif #HWLOC_HAVE_PTRACE