libphobos: Add section support code for OpenBSD (PR99691)

libphobos/ChangeLog:

	PR d/99691
	* configure: Regenerate.
	* libdruntime/config/common/threadasm.S: Add __OpenBSD__.
	* libdruntime/gcc/backtrace.d: Import core.sys.openbsd.dlfcn on
	OpenBSD platforms.
	* libdruntime/gcc/sections/elf.d (SharedElf): Define on OpenBSD.
	(linkMapForHandle): Implement for OpenBSD.
	(exeLinkMap): Remove.
	(getDependencies): Adjust dlpi_addr on OpenBSD.
	(handleForName): Implement for OpenBSD.
	(IterateManually): Define on OpenBSD.
	* libdruntime/gcc/sections/package.d (SectionsElf): Define on OpenBSD.
	* m4/druntime/libraries.m4 (DRUNTIME_LIBRARIES_ATOMIC): Test for
	enable_libatomic.
	(DRUNTIME_LIBRARIES_BACKTRACE): Test for enable_libbacktrace.

6 files changed, 48 insertions, 21 deletions

diff --git a/libphobos/configure b/libphobos/configure
index fe7cd9c..2c0f57c 100755
--- a/libphobos/configure
+++ b/libphobos/configure
@@ -14917,7 +14917,7 @@ fi
 
   DCFG_HAVE_LIBATOMIC=false
   LIBATOMIC=
-  if test "x$with_libatomic" != "xno"; then :
+  if test "x$enable_libatomic" != "xno" && test "x$with_libatomic" != "xno"; then :
 
     DCFG_HAVE_LIBATOMIC=true
     LIBATOMIC=../../libatomic/libatomic_convenience.la
@@ -14953,7 +14953,7 @@ if test "${with_libbacktrace+set}" = set; then :
 fi
 
 
-  if test "x$with_libbacktrace" != "xno"; then :
+  if test "x$enable_libbacktrace" != "xno" && test "x$with_libbacktrace" != "xno"; then :
 
     LIBBACKTRACE=../../libbacktrace/libbacktrace.la
 
diff --git a/libphobos/libdruntime/config/common/threadasm.S b/libphobos/libdruntime/config/common/threadasm.S
index 1e9bc76..3546217 100644
--- a/libphobos/libdruntime/config/common/threadasm.S
+++ b/libphobos/libdruntime/config/common/threadasm.S
@@ -22,7 +22,7 @@ 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/>.  */
 
-#if (__linux__ || __FreeBSD__ || __NetBSD__ || __DragonFly__) && __ELF__
+#if (__linux__ || __FreeBSD__ || __NetBSD__ || __OpenBSD__ || __DragonFly__) && __ELF__
 /*
  * Mark the resulting object file as not requiring execution permissions on
  * stack memory. The absence of this section would mark the whole resulting
diff --git a/libphobos/libdruntime/gcc/backtrace.d b/libphobos/libdruntime/gcc/backtrace.d
index 45dd011..8f5582d 100644
--- a/libphobos/libdruntime/gcc/backtrace.d
+++ b/libphobos/libdruntime/gcc/backtrace.d
@@ -424,8 +424,10 @@ private:
         import core.sys.freebsd.dlfcn;
     else version (NetBSD)
         import core.sys.netbsd.dlfcn;
+    else version (OpenBSD)
+        import core.sys.openbsd.dlfcn;
     else version (Solaris)
-        import core.sys.netbsd.dlfcn;
+        import core.sys.solaris.dlfcn;
     else version (Posix)
         import core.sys.posix.dlfcn;
 
diff --git a/libphobos/libdruntime/gcc/sections/elf.d b/libphobos/libdruntime/gcc/sections/elf.d
index 8450aec..3480fb9 100644
--- a/libphobos/libdruntime/gcc/sections/elf.d
+++ b/libphobos/libdruntime/gcc/sections/elf.d
@@ -33,6 +33,7 @@ version (CRuntime_Glibc) enum SharedELF = true;
 else version (CRuntime_Musl) enum SharedELF = true;
 else version (FreeBSD) enum SharedELF = true;
 else version (NetBSD) enum SharedELF = true;
+else version (OpenBSD) enum SharedELF = true;
 else version (DragonFlyBSD) enum SharedELF = true;
 else version (CRuntime_UClibc) enum SharedELF = true;
 else version (Solaris) enum SharedELF = true;
@@ -62,6 +63,12 @@ else version (NetBSD)
     import core.sys.netbsd.sys.elf;
     import core.sys.netbsd.sys.link_elf;
 }
+else version (OpenBSD)
+{
+    import core.sys.openbsd.dlfcn;
+    import core.sys.openbsd.sys.elf;
+    import core.sys.openbsd.sys.link_elf;
+}
 else version (DragonFlyBSD)
 {
     import core.sys.dragonflybsd.dlfcn;
@@ -688,20 +695,22 @@ version (Shared)
 @nogc nothrow:
     link_map* linkMapForHandle(void* handle)
     {
-        link_map* map;
-        const success = dlinfo(handle, RTLD_DI_LINKMAP, &map) == 0;
-        safeAssert(success, "Failed to get DSO info.");
-        return map;
+        static if (__traits(compiles, RTLD_DI_LINKMAP))
+        {
+            link_map* map;
+            const success = dlinfo(handle, RTLD_DI_LINKMAP, &map) == 0;
+            safeAssert(success, "Failed to get DSO info.");
+            return map;
+        }
+        else version (OpenBSD)
+        {
+            safeAssert(handle !is null, "Failed to get DSO info.");
+            return cast(link_map*)handle;
+        }
+        else
+            static assert(0, "unimplemented");
     }
 
-     link_map* exeLinkMap(link_map* map)
-     {
-         safeAssert(map !is null, "Invalid link_map.");
-         while (map.l_prev !is null)
-             map = map.l_prev;
-         return map;
-     }
-
     DSO* dsoForHandle(void* handle)
     {
         DSO* pdso;
@@ -766,6 +775,8 @@ version (Shared)
                     strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
                 else version (NetBSD)
                     strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
+                else version (OpenBSD)
+                    strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
                 else version (DragonFlyBSD)
                     strtab = cast(const(char)*)(info.dlpi_addr + dyn.d_un.d_ptr); // relocate
                 else version (Solaris)
@@ -795,9 +806,21 @@ version (Shared)
 
     void* handleForName(const char* name)
     {
-        auto handle = .dlopen(name, RTLD_NOLOAD | RTLD_LAZY);
-        version (Solaris) { }
-        else if (handle !is null) .dlclose(handle); // drop reference count
+        version (Solaris) enum refCounted = false;
+        else version (OpenBSD) enum refCounted = false;
+        else enum refCounted = true;
+
+        static if (__traits(compiles, RTLD_NOLOAD))
+            enum flags = (RTLD_NOLOAD | RTLD_LAZY);
+        else
+            enum flags = RTLD_LAZY;
+
+        auto handle = .dlopen(name, flags);
+        static if (refCounted)
+        {
+            if (handle !is null)
+                .dlclose(handle); // drop reference count
+        }
         return handle;
     }
 }
@@ -891,6 +914,7 @@ bool findDSOInfoForAddr(in void* addr, dl_phdr_info* result=null) nothrow @nogc
 {
     version (linux)        enum IterateManually = true;
     else version (NetBSD)  enum IterateManually = true;
+    else version (OpenBSD) enum IterateManually = true;
     else version (Solaris) enum IterateManually = true;
     else                   enum IterateManually = false;
 
diff --git a/libphobos/libdruntime/gcc/sections/package.d b/libphobos/libdruntime/gcc/sections/package.d
index 4c2b542..1e887cd 100644
--- a/libphobos/libdruntime/gcc/sections/package.d
+++ b/libphobos/libdruntime/gcc/sections/package.d
@@ -27,6 +27,7 @@ version (CRuntime_Musl)   version = SectionsElf;
 version (CRuntime_UClibc) version = SectionsElf;
 version (FreeBSD)         version = SectionsElf;
 version (NetBSD)          version = SectionsElf;
+version (OpenBSD)         version = SectionsElf;
 version (DragonFlyBSD)    version = SectionsElf;
 version (Solaris)         version = SectionsElf;
 version (OSX)             version = SectionsMacho;
diff --git a/libphobos/m4/druntime/libraries.m4 b/libphobos/m4/druntime/libraries.m4
index 743d3e3..45a56f6 100644
--- a/libphobos/m4/druntime/libraries.m4
+++ b/libphobos/m4/druntime/libraries.m4
@@ -116,7 +116,7 @@ AC_DEFUN([DRUNTIME_LIBRARIES_ATOMIC],
 
   DCFG_HAVE_LIBATOMIC=false
   LIBATOMIC=
-  AS_IF([test "x$with_libatomic" != "xno"], [
+  AS_IF([test "x$enable_libatomic" != "xno" && test "x$with_libatomic" != "xno"], [
     DCFG_HAVE_LIBATOMIC=true
     LIBATOMIC=../../libatomic/libatomic_convenience.la
   ], [
@@ -145,7 +145,7 @@ AC_DEFUN([DRUNTIME_LIBRARIES_BACKTRACE],
     AS_HELP_STRING([--without-libbacktrace],
                    [Do not use libbacktrace in core.runtime (default: auto)]))
 
-  AS_IF([test "x$with_libbacktrace" != "xno"], [
+  AS_IF([test "x$enable_libbacktrace" != "xno" && test "x$with_libbacktrace" != "xno"], [
     LIBBACKTRACE=../../libbacktrace/libbacktrace.la
 
     gdc_save_CPPFLAGS=$CPPFLAGS