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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 08/28] libxc: ocaml: add simple binding for xentoollog (output only).
These bindings allow ocaml code to receive log message via xentoollog
but do not support injecting messages into xentoollog from ocaml.
Receiving log messages from libx{c,l} and forwarding them to ocaml is
the use case which is needed by the following patches.
Add a simple noddy test case (tools/ocaml/test).
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Signed-off-by: Rob Hoes <rob.hoes@xxxxxxxxxx>
---
.gitignore | 1 +
.hgignore | 1 +
tools/ocaml/Makefile | 2 +-
tools/ocaml/Makefile.rules | 2 +-
tools/ocaml/libs/Makefile | 1 +
tools/ocaml/libs/xentoollog/META.in | 4 +
tools/ocaml/libs/xentoollog/Makefile | 33 ++++
tools/ocaml/libs/xentoollog/xentoollog.ml | 102 +++++++++++
tools/ocaml/libs/xentoollog/xentoollog.mli | 54 ++++++
tools/ocaml/libs/xentoollog/xentoollog_stubs.c | 215 ++++++++++++++++++++++++
tools/ocaml/test/Makefile | 28 +++
tools/ocaml/test/xtl.ml | 20 +++
12 files changed, 461 insertions(+), 2 deletions(-)
create mode 100644 tools/ocaml/libs/xentoollog/META.in
create mode 100644 tools/ocaml/libs/xentoollog/Makefile
create mode 100644 tools/ocaml/libs/xentoollog/xentoollog.ml
create mode 100644 tools/ocaml/libs/xentoollog/xentoollog.mli
create mode 100644 tools/ocaml/libs/xentoollog/xentoollog_stubs.c
create mode 100644 tools/ocaml/test/Makefile
create mode 100644 tools/ocaml/test/xtl.ml
diff --git a/.gitignore b/.gitignore
index fce8c89..05b9bb0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -398,6 +398,7 @@ tools/ocaml/libs/xl/_libxl_types.mli.in
tools/ocaml/libs/xl/xenlight.ml
tools/ocaml/libs/xl/xenlight.mli
tools/ocaml/xenstored/oxenstored
+tools/ocaml/test/xtl
tools/debugger/kdd/kdd
tools/firmware/etherboot/ipxe.tar.gz
diff --git a/.hgignore b/.hgignore
index 6b432f7..7d59535 100644
--- a/.hgignore
+++ b/.hgignore
@@ -325,6 +325,7 @@
^tools/ocaml/libs/xl/xenlight\.ml$
^tools/ocaml/libs/xl/xenlight\.mli$
^tools/ocaml/xenstored/oxenstored$
+^tools/ocaml/test/xtl$
^tools/autom4te\.cache$
^tools/config\.h$
^tools/config\.log$
diff --git a/tools/ocaml/Makefile b/tools/ocaml/Makefile
index 6b22bbe..8e4ca36 100644
--- a/tools/ocaml/Makefile
+++ b/tools/ocaml/Makefile
@@ -1,7 +1,7 @@
XEN_ROOT = $(CURDIR)/../..
include $(XEN_ROOT)/tools/Rules.mk
-SUBDIRS_PROGRAMS = xenstored
+SUBDIRS_PROGRAMS = xenstored test
SUBDIRS = libs $(SUBDIRS_PROGRAMS)
diff --git a/tools/ocaml/Makefile.rules b/tools/ocaml/Makefile.rules
index ff19067..ed1dd76 100644
--- a/tools/ocaml/Makefile.rules
+++ b/tools/ocaml/Makefile.rules
@@ -24,7 +24,7 @@ ALL_OCAML_OBJS ?= $(OBJS)
%.cmi: %.mli
$(call quiet-command, $(OCAMLC) $(OCAMLCFLAGS) -c -o $@ $<,MLI,$@)
-%.cmx: %.ml
+%.cmx %.o: %.ml
$(call quiet-command, $(OCAMLOPT) $(OCAMLOPTFLAGS) -c -o $@ $<,MLOPT,$@)
%.ml: %.mll
diff --git a/tools/ocaml/libs/Makefile b/tools/ocaml/libs/Makefile
index bca0fa2..3afdc89 100644
--- a/tools/ocaml/libs/Makefile
+++ b/tools/ocaml/libs/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
SUBDIRS= \
mmap \
+ xentoollog \
xc eventchn \
xb xs xl
diff --git a/tools/ocaml/libs/xentoollog/META.in
b/tools/ocaml/libs/xentoollog/META.in
new file mode 100644
index 0000000..7b06683
--- /dev/null
+++ b/tools/ocaml/libs/xentoollog/META.in
@@ -0,0 +1,4 @@
+version = "@VERSION@"
+description = "Xen Tools Logger Interface"
+archive(byte) = "xentoollog.cma"
+archive(native) = "xentoollog.cmxa"
diff --git a/tools/ocaml/libs/xentoollog/Makefile
b/tools/ocaml/libs/xentoollog/Makefile
new file mode 100644
index 0000000..17dca95
--- /dev/null
+++ b/tools/ocaml/libs/xentoollog/Makefile
@@ -0,0 +1,33 @@
+TOPLEVEL=$(CURDIR)/../..
+XEN_ROOT=$(TOPLEVEL)/../..
+include $(TOPLEVEL)/common.make
+
+CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenguest)
+OCAMLINCLUDE +=
+
+OBJS = xentoollog
+INTF = xentoollog.cmi
+LIBS = xentoollog.cma xentoollog.cmxa
+
+LIBS_xentoollog = $(LDLIBS_libxenctrl)
+
+xentoollog_OBJS = $(OBJS)
+xentoollog_C_OBJS = xentoollog_stubs
+
+OCAML_LIBRARY = xentoollog
+
+all: $(INTF) $(LIBS)
+
+libs: $(LIBS)
+
+.PHONY: install
+install: $(LIBS) META
+ mkdir -p $(OCAMLDESTDIR)
+ ocamlfind remove -destdir $(OCAMLDESTDIR) xentoollog
+ ocamlfind install -destdir $(OCAMLDESTDIR) -ldconf ignore xentoollog
META $(INTF) $(LIBS) *.a *.so *.cmx
+
+.PHONY: uninstall
+uninstall:
+ ocamlfind remove -destdir $(OCAMLDESTDIR) xentoollog
+
+include $(TOPLEVEL)/Makefile.rules
diff --git a/tools/ocaml/libs/xentoollog/xentoollog.ml
b/tools/ocaml/libs/xentoollog/xentoollog.ml
new file mode 100644
index 0000000..226722c
--- /dev/null
+++ b/tools/ocaml/libs/xentoollog/xentoollog.ml
@@ -0,0 +1,102 @@
+(*
+ * Copyright (C) 2012 Citrix Ltd.
+ * Author Ian Campbell <ian.campbell@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *)
+
+open Printf
+open Random
+open Callback
+
+type level = Debug
+ | Verbose
+ | Detail
+ | Progress
+ | Info
+ | Notice
+ | Warn
+ | Error
+ | Critical
+
+let level_to_string level =
+ match level with
+ | Debug -> "Debug"
+ | Verbose -> "Verbose"
+ | Detail -> "Detail"
+ | Progress -> "Progress"
+ | Info -> "Info"
+ | Notice -> "Notice"
+ | Warn -> "Warn"
+ | Error -> "Error"
+ | Critical -> "Critical"
+
+let level_to_prio level =
+ match level with
+ | Debug -> 0
+ | Verbose -> 1
+ | Detail -> 2
+ | Progress -> 3
+ | Info -> 4
+ | Notice -> 5
+ | Warn -> 6
+ | Error -> 7
+ | Critical -> 8
+
+let compare_level x y =
+ compare (level_to_prio x) (level_to_prio y)
+
+type handle
+
+type logger_cbs = {
+ vmessage : level -> int option -> string option -> string ->
unit;
+ progress : string option -> string -> int -> int64 -> int64
-> unit;
+ (*destroy : unit -> unit*) }
+
+external _create_logger: (string * string) -> handle = "stub_xtl_create_logger"
+external test: handle -> unit = "stub_xtl_test"
+
+let create name cbs : handle =
+ (* Callback names are supposed to be unique *)
+ let suffix = string_of_int (Random.int 1000000) in
+ let vmessage_name = sprintf "%s_vmessage_%s" name suffix in
+ let progress_name = sprintf "%s_progress_%s" name suffix in
+ (*let destroy_name = sprintf "%s_destroy" name in*)
+ begin
+ Callback.register vmessage_name cbs.vmessage;
+ Callback.register progress_name cbs.progress;
+ _create_logger (vmessage_name, progress_name)
+ end
+
+
+let stdio_vmessage min_level level errno ctx msg =
+ let level_str = level_to_string level
+ and errno_str = match errno with None -> "" | Some s -> sprintf ": errno=%d"
s
+ and ctx_str = match ctx with None -> "" | Some s -> sprintf ": %s" s in
+ if compare min_level level <= 0 then begin
+ printf "%s%s%s: %s\n" level_str ctx_str errno_str msg;
+ flush stdout;
+ end;
+ ()
+
+let stdio_progress ctx what percent dne total =
+ let nl = if dne = total then "\n" else "" in
+ printf "\rProgress %s %d%% (%Ld/%Ld)%s" what percent dne total nl;
+ flush stdout;
+ ()
+
+let create_stdio_logger ?(level=Info) () =
+ let cbs = {
+ vmessage = stdio_vmessage level;
+ progress = stdio_progress; } in
+ create "Xentoollog.stdio_logger" cbs
+
+external destroy: handle -> unit = "stub_xtl_destroy"
diff --git a/tools/ocaml/libs/xentoollog/xentoollog.mli
b/tools/ocaml/libs/xentoollog/xentoollog.mli
new file mode 100644
index 0000000..ae417f5
--- /dev/null
+++ b/tools/ocaml/libs/xentoollog/xentoollog.mli
@@ -0,0 +1,54 @@
+(*
+ * Copyright (C) 2012 Citrix Ltd.
+ * Author Ian Campbell <ian.campbell@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *)
+
+type level = Debug
+ | Verbose
+ | Detail
+ | Progress (* also used for "progress" messages *)
+ | Info
+ | Notice
+ | Warn
+ | Error
+ | Critical
+
+val level_to_string : level -> string
+
+val compare_level : level -> level -> int
+
+type handle
+
+(** call back arguments. See xentoollog.h for more info.
+ vmessage:
+ level: level as above
+ errno: Some <errno> or None
+ context: Some <string> or None
+ message: The log message (already formatted)
+ progress:
+ context: Some <string> or None
+ doing_what: string
+ percent, done, total.
+*)
+type logger_cbs = {
+ vmessage : level -> int option -> string option -> string ->
unit;
+ progress : string option -> string -> int -> int64 -> int64
-> unit;
+ (*destroy : handle -> unit*) }
+
+external test: handle -> unit = "stub_xtl_test"
+
+val create : string -> logger_cbs -> handle
+
+val create_stdio_logger : ?level:level -> unit -> handle
+
+external destroy: handle -> unit = "stub_xtl_destroy"
diff --git a/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
b/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
new file mode 100644
index 0000000..7c1b775
--- /dev/null
+++ b/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2012 Citrix Ltd.
+ * Author Ian Campbell <ian.campbell@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * This program 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 Lesser General Public License for more details.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define CAML_NAME_SPACE
+#include <caml/alloc.h>
+#include <caml/memory.h>
+#include <caml/signals.h>
+#include <caml/fail.h>
+#include <caml/callback.h>
+
+
+#include <xentoollog.h>
+
+struct caml_xtl {
+ xentoollog_logger vtable;
+ char *vmessage_cb;
+ char *progress_cb;
+};
+
+#define HND ((struct caml_xtl*)handle)
+#define XTL ((xentoollog_logger *)HND)
+
+static char * dup_String_val(value s)
+{
+ int len;
+ char *c;
+ len = caml_string_length(s);
+ c = calloc(len + 1, sizeof(char));
+ if (!c)
+ caml_raise_out_of_memory();
+ memcpy(c, String_val(s), len);
+ return c;
+}
+
+static value Val_level(xentoollog_level c_level)
+{
+ /* Must correspond to order in .mli */
+ switch (c_level) {
+ case XTL_NONE: /* Not a real value */
+ caml_raise_sys_error(caml_copy_string("Val_level XTL_NONE"));
+ break;
+ case XTL_DEBUG: return Val_int(0);
+ case XTL_VERBOSE: return Val_int(1);
+ case XTL_DETAIL: return Val_int(2);
+ case XTL_PROGRESS: return Val_int(3);
+ case XTL_INFO: return Val_int(4);
+ case XTL_NOTICE: return Val_int(5);
+ case XTL_WARN: return Val_int(6);
+ case XTL_ERROR: return Val_int(7);
+ case XTL_CRITICAL: return Val_int(8);
+ case XTL_NUM_LEVELS: /* Not a real value! */
+ caml_raise_sys_error(
+ caml_copy_string("Val_level XTL_NUM_LEVELS"));
+#if 0 /* Let the compiler catch this */
+ default:
+ caml_raise_sys_error(caml_copy_string("Val_level Unknown"));
+ break;
+#endif
+ }
+ abort();
+}
+
+/* Option type support as per
http://www.linux-nantes.org/~fmonnier/ocaml/ocaml-wrapping-c.php */
+#define Val_none Val_int(0)
+#define Some_val(v) Field(v,0)
+
+static value Val_some(value v)
+{
+ CAMLparam1(v);
+ CAMLlocal1(some);
+ some = caml_alloc(1, 0);
+ Store_field(some, 0, v);
+ CAMLreturn(some);
+}
+
+static value Val_errno(int errnoval)
+{
+ if (errnoval == -1)
+ return Val_none;
+ return Val_some(Val_int(errnoval));
+}
+
+static value Val_context(const char *context)
+{
+ if (context == NULL)
+ return Val_none;
+ return Val_some(caml_copy_string(context));
+}
+
+static void stub_xtl_ocaml_vmessage(struct xentoollog_logger *logger,
+ xentoollog_level level,
+ int errnoval,
+ const char *context,
+ const char *format,
+ va_list al)
+{
+ CAMLparam0();
+ CAMLlocalN(args, 4);
+ struct caml_xtl *xtl = (struct caml_xtl*)logger;
+ value *func = caml_named_value(xtl->vmessage_cb) ;
+ char *msg;
+
+ if (args == NULL)
+ caml_raise_out_of_memory();
+ if (func == NULL)
+ caml_raise_sys_error(caml_copy_string("Unable to find
callback"));
+ if (vasprintf(&msg, format, al) < 0)
+ caml_raise_out_of_memory();
+
+ /* vmessage : level -> int option -> string option -> string -> unit; */
+ args[0] = Val_level(level);
+ args[1] = Val_errno(errnoval);
+ args[2] = Val_context(context);
+ args[3] = caml_copy_string(msg);
+
+ free(msg);
+
+ caml_callbackN(*func, 4, args);
+ CAMLreturn0;
+}
+
+static void stub_xtl_ocaml_progress(struct xentoollog_logger *logger,
+ const char *context,
+ const char *doing_what /* no \r,\n */,
+ int percent, unsigned long done, unsigned
long total)
+{
+ CAMLparam0();
+ CAMLlocalN(args, 5);
+ struct caml_xtl *xtl = (struct caml_xtl*)logger;
+ value *func = caml_named_value(xtl->progress_cb) ;
+
+ if (args == NULL)
+ caml_raise_out_of_memory();
+ if (func == NULL)
+ caml_raise_sys_error(caml_copy_string("Unable to find
callback"));
+
+ /* progress : string option -> string -> int -> int64 -> int64 -> unit;
*/
+ args[0] = Val_context(context);
+ args[1] = caml_copy_string(doing_what);
+ args[2] = Val_int(percent);
+ args[3] = caml_copy_int64(done);
+ args[4] = caml_copy_int64(total);
+
+ caml_callbackN(*func, 5, args);
+ CAMLreturn0;
+}
+
+static void xtl_destroy(struct xentoollog_logger *logger)
+{
+ struct caml_xtl *xtl = (struct caml_xtl*)logger;
+ free(xtl->vmessage_cb);
+ free(xtl->progress_cb);
+ free(xtl);
+}
+
+/* external _create_logger: (string * string) -> handle =
"stub_xtl_create_logger" */
+CAMLprim value stub_xtl_create_logger(value cbs)
+{
+ CAMLparam1(cbs);
+ struct caml_xtl *xtl = malloc(sizeof(*xtl));
+ if (xtl == NULL)
+ caml_raise_out_of_memory();
+
+ memset(xtl, 0, sizeof(*xtl));
+
+ xtl->vtable.vmessage = &stub_xtl_ocaml_vmessage;
+ xtl->vtable.progress = &stub_xtl_ocaml_progress;
+ xtl->vtable.destroy = &xtl_destroy;
+
+ xtl->vmessage_cb = dup_String_val(Field(cbs, 0));
+ xtl->progress_cb = dup_String_val(Field(cbs, 1));
+ CAMLreturn((value)xtl);
+}
+
+/* external destroy: handle -> unit = "stub_xtl_destroy" */
+CAMLprim value stub_xtl_destroy(value handle)
+{
+ CAMLparam1(handle);
+ xtl_logger_destroy(XTL);
+ CAMLreturn(Val_unit);
+}
+
+/* external test: handle -> unit = "stub_xtl_test" */
+CAMLprim value stub_xtl_test(value handle)
+{
+ unsigned long l;
+ CAMLparam1(handle);
+ xtl_log(XTL, XTL_DEBUG, -1, "debug", "%s -- debug", __func__);
+ xtl_log(XTL, XTL_INFO, -1, "test", "%s -- test 1", __func__);
+ xtl_log(XTL, XTL_INFO, ENOSYS, "test errno", "%s -- test 2", __func__);
+ xtl_log(XTL, XTL_CRITICAL, -1, "critical", "%s -- critical", __func__);
+ for (l = 0UL; l<=100UL; l += 10UL) {
+ xtl_progress(XTL, "progress", "testing", l, 100UL);
+ usleep(10000);
+ }
+ CAMLreturn(Val_unit);
+}
diff --git a/tools/ocaml/test/Makefile b/tools/ocaml/test/Makefile
new file mode 100644
index 0000000..980054c
--- /dev/null
+++ b/tools/ocaml/test/Makefile
@@ -0,0 +1,28 @@
+XEN_ROOT = $(CURDIR)/../../..
+OCAML_TOPLEVEL = $(CURDIR)/..
+include $(OCAML_TOPLEVEL)/common.make
+
+OCAMLINCLUDE += \
+ -I $(OCAML_TOPLEVEL)/libs/xentoollog
+
+OBJS = xtl
+
+PROGRAMS = xtl
+
+xtl_LIBS = \
+ -ccopt -L -ccopt $(OCAML_TOPLEVEL)/libs/xentoollog
$(OCAML_TOPLEVEL)/libs/xentoollog/xentoollog.cmxa \
+ -cclib -lxenctrl
+
+xtl_OBJS = xtl
+
+OCAML_PROGRAM = xtl
+
+all: $(PROGRAMS)
+
+bins: $(PROGRAMS)
+
+install: all
+ $(INSTALL_DIR) $(DESTDIR)$(BINDIR)
+ $(INSTALL_PROG) $(PROGRAMS) $(DESTDIR)$(BINDIR)
+
+include $(OCAML_TOPLEVEL)/Makefile.rules
diff --git a/tools/ocaml/test/xtl.ml b/tools/ocaml/test/xtl.ml
new file mode 100644
index 0000000..3afaa60
--- /dev/null
+++ b/tools/ocaml/test/xtl.ml
@@ -0,0 +1,20 @@
+open Arg
+open Xentoollog
+
+let do_test level =
+ let lgr = Xentoollog.create_stdio_logger ~level:level () in
+ begin
+ Xentoollog.test lgr;
+ Xentoollog.destroy lgr;
+ end
+
+let () =
+ let debug_level = ref Xentoollog.Info in
+ let speclist = [
+ ("-v", Arg.Unit (fun () -> debug_level := Xentoollog.Debug), "Verbose");
+ ("-q", Arg.Unit (fun () -> debug_level := Xentoollog.Critical), "Quiet");
+ ] in
+ let usage_msg = "usage: xtl [OPTIONS]" in
+ Arg.parse speclist (fun s -> ()) usage_msg;
+
+ do_test !debug_level
--
1.7.10.4
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