Pino Toscano
2016-Feb-24 12:52 UTC
[Libguestfs] [PATCH 1/3] src: generate code for printing contents of structs
Extend the generator to generate a source (and the header for it) with
functions that print the content of a guestfs struct. The code is
modelled after the code for it in fish.ml, although made a bit more
generic (destination FILE*, line separator) so it can be used also in
the library, when tracing.
This just introduces the new code and builds it as part of the helper
libutils.la.
---
.gitignore | 2 +
generator/c.ml | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
generator/c.mli | 2 +
generator/main.ml | 2 +
po/POTFILES | 1 +
src/Makefile.am | 6 ++-
6 files changed, 136 insertions(+), 1 deletion(-)
diff --git a/.gitignore b/.gitignore
index 40bebb3..1493011 100644
--- a/.gitignore
+++ b/.gitignore
@@ -468,6 +468,8 @@ Makefile.in
/src/structs-compare.c
/src/structs-copy.c
/src/structs-free.c
+/src/structs-print.c
+/src/structs-print.h
/src/test-utils
/stamp-h1
/sysprep/.depend
diff --git a/generator/c.ml b/generator/c.ml
index 417e2bc..9af4529 100644
--- a/generator/c.ml
+++ b/generator/c.ml
@@ -1204,6 +1204,130 @@ and generate_client_structs_cleanup ()
) structs
+(* Generate structs-print.c file. *)
+and generate_client_structs_print_c () + generate_header CStyle LGPLv2plus;
+
+ pr "\
+#include <config.h>
+
+#include <inttypes.h>
+
+#include \"c-ctype.h\"
+
+#include \"guestfs.h\"
+#include \"structs-print.h\"
+
+";
+
+ let write_structs + List.iter (
+ fun { s_name = typ; s_cols = cols } ->
+ let needs_i + List.exists (function (_, (FUUID|FBuffer)) ->
true | _ -> false) cols in
+
+ pr "void\n";
+ pr "guestfs_int_print_%s_indent (struct guestfs_%s *%s, FILE
*dest, const char *linesep, const char *indent)\n"
+ typ typ typ;
+ pr "{\n";
+ if needs_i then (
+ pr " size_t i;\n";
+ pr "\n"
+ );
+ List.iter (
+ function
+ | name, FString ->
+ pr " fprintf (dest, \"%%s%s: %%s%%s\", indent,
%s->%s, linesep);\n"
+ name typ name
+ | name, FUUID ->
+ pr " fprintf (dest, \"%%s%s: \", indent);\n"
name;
+ pr " for (i = 0; i < 32; ++i)\n";
+ pr " fprintf (dest, \"%%c\",
%s->%s[i]);\n" typ name;
+ pr " fprintf (dest, \"%%s\", linesep);\n"
+ | name, FBuffer ->
+ pr " fprintf (dest, \"%%s%s: \", indent);\n"
name;
+ pr " for (i = 0; i < %s->%s_len; ++i)\n" typ
name;
+ pr " if (c_isprint (%s->%s[i]))\n" typ name;
+ pr " fprintf (dest, \"%%c\",
%s->%s[i]);\n" typ name;
+ pr " else\n";
+ pr " fprintf (dest, \"\\\\x%%02x\",
(unsigned) %s->%s[i]);\n"
+ typ name;
+ pr " fprintf (dest, \"%%s\", linesep);\n"
+ | name, (FUInt64|FBytes) ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIu64
\"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FInt64 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIi64
\"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FUInt32 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIu32
\"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FInt32 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIi32
\"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FChar ->
+ pr " fprintf (dest, \"%%s%s: %%c%%s\", indent,
%s->%s, linesep);\n"
+ name typ name
+ | name, FOptPercent ->
+ pr " if (%s->%s >= 0)\n" typ name;
+ pr " fprintf (dest, \"%%s%s: %%g %%%%%%s\",
indent, (double) %s->%s, linesep);\n"
+ name typ name;
+ pr " else\n";
+ pr " fprintf (dest, \"%%s%s: %%s\", indent,
linesep);\n" name
+ ) cols;
+ pr "}\n";
+ pr "\n";
+ ) in
+
+ write_structs external_structs;
+
+ pr "\
+#if GUESTFS_PRIVATE
+
+";
+
+ write_structs internal_structs;
+
+ pr "\
+#endif /* End of GUESTFS_PRIVATE. */
+"
+
+(* Generate structs-print.h file. *)
+and generate_client_structs_print_h () + generate_header CStyle LGPLv2plus;
+
+ pr "\
+#ifndef GUESTFS_INTERNAL_STRUCTS_PRINT_H_
+#define GUESTFS_INTERNAL_STRUCTS_PRINT_H_
+
+#include <stdio.h>
+
+";
+
+ let write_structs + List.iter (
+ fun { s_name = name } ->
+ pr "extern void guestfs_int_print_%s_indent (struct guestfs_%s
*%s, FILE *dest, const char *linesep, const char *indent);\n"
+ name name name
+ ) in
+
+ write_structs external_structs;
+
+ pr "\
+
+#if GUESTFS_PRIVATE
+
+";
+
+ write_structs internal_structs;
+
+ pr "\
+
+#endif /* End of GUESTFS_PRIVATE. */
+
+#endif /* GUESTFS_INTERNAL_STRUCTS_PRINT_H_ */
+"
+
(* Generate the client-side dispatch stubs. *)
and generate_client_actions hash () generate_header CStyle LGPLv2plus;
diff --git a/generator/c.mli b/generator/c.mli
index 9a261a4..156b244 100644
--- a/generator/c.mli
+++ b/generator/c.mli
@@ -32,6 +32,8 @@ val generate_client_structs_cleanup : unit -> unit
val generate_client_structs_compare : unit -> unit
val generate_client_structs_copy : unit -> unit
val generate_client_structs_free : unit -> unit
+val generate_client_structs_print_h : unit -> unit
+val generate_client_structs_print_c : unit -> unit
val generate_event_string_c : unit -> unit
val generate_guestfs_h : unit -> unit
val generate_internal_actions_h : unit -> unit
diff --git a/generator/main.ml b/generator/main.ml
index 63a5d25..8d08d83 100644
--- a/generator/main.ml
+++ b/generator/main.ml
@@ -99,6 +99,8 @@ Run it from the top source directory using the command
output_to "src/structs-copy.c" generate_client_structs_copy;
output_to "src/structs-free.c" generate_client_structs_free;
output_to "src/structs-cleanup.c" generate_client_structs_cleanup;
+ output_to "src/structs-print.c" generate_client_structs_print_c;
+ output_to "src/structs-print.h" generate_client_structs_print_h;
output_to "src/actions-variants.c"
generate_client_actions_variants;
for i = 0 to nr_actions_files-1 do
diff --git a/po/POTFILES b/po/POTFILES
index 2a1e313..0fb99b0 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -353,6 +353,7 @@ src/structs-cleanup.c
src/structs-compare.c
src/structs-copy.c
src/structs-free.c
+src/structs-print.c
src/test-utils.c
src/tmpdirs.c
src/utils.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 3ebb7f5..60641bf 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -46,7 +46,9 @@ generator_built = \
structs-cleanup.c \
structs-compare.c \
structs-copy.c \
- structs-free.c
+ structs-free.c \
+ structs-print.c \
+ structs-print.h
BUILT_SOURCES = \
$(generator_built) \
@@ -226,6 +228,8 @@ endif
libutils_la_SOURCES = \
cleanup.c \
structs-cleanup.c \
+ structs-print.c \
+ structs-print.h \
utils.c
libutils_la_CPPFLAGS = $(libguestfs_la_CPPFLAGS)
libutils_la_CFLAGS = $(libguestfs_la_CFLAGS)
--
2.5.0
Pino Toscano
2016-Feb-24 12:52 UTC
[Libguestfs] [PATCH 2/3] fish: use the new structs-print.c to print structs
Use of the new code to print structs, making sure the layout is the same
as before.
---
generator/fish.ml | 64 +++++--------------------------------------------------
1 file changed, 5 insertions(+), 59 deletions(-)
diff --git a/generator/fish.ml b/generator/fish.ml
index c5bf7e0..0cbc781 100644
--- a/generator/fish.ml
+++ b/generator/fish.ml
@@ -94,6 +94,7 @@ let generate_fish_cmds () pr "\n";
pr "#include \"guestfs.h\"\n";
pr "#include \"guestfs-internal-frontend.h\"\n";
+ pr "#include \"structs-print.h\"\n";
pr "\n";
pr "#include \"fish.h\"\n";
pr "#include \"fish-cmds.h\"\n";
@@ -255,70 +256,14 @@ Guestfish will prompt for these separately."
pr "\n";
pr " for (i = 0; i < %ss->len; ++i) {\n" typ;
pr " printf (\"[%%zu] = {\\n\", i);\n";
- pr " print_%s_indent (&%ss->val[i], \"
\");\n" typ typ;
+ pr " guestfs_int_print_%s_indent (&%ss->val[i], stdout,
\"\\n\", \" \");\n"
+ typ typ;
pr " printf (\"}\\n\");\n";
pr " }\n";
pr "}\n";
pr "\n";
in
- (* print_* functions *)
- List.iter (
- fun { s_name = typ; s_cols = cols } ->
- let needs_i - List.exists (function (_, (FUUID|FBuffer)) ->
true | _ -> false) cols in
-
- pr "static void\n";
- pr "print_%s_indent (struct guestfs_%s *%s, const char
*indent)\n" typ typ typ;
- pr "{\n";
- if needs_i then (
- pr " size_t i;\n";
- pr "\n"
- );
- List.iter (
- function
- | name, FString ->
- pr " printf (\"%%s%s: %%s\\n\", indent,
%s->%s);\n" name typ name
- | name, FUUID ->
- pr " printf (\"%%s%s: \", indent);\n" name;
- pr " for (i = 0; i < 32; ++i)\n";
- pr " printf (\"%%c\", %s->%s[i]);\n" typ
name;
- pr " printf (\"\\n\");\n"
- | name, FBuffer ->
- pr " printf (\"%%s%s: \", indent);\n" name;
- pr " for (i = 0; i < %s->%s_len; ++i)\n" typ name;
- pr " if (c_isprint (%s->%s[i]))\n" typ name;
- pr " printf (\"%%c\", %s->%s[i]);\n"
typ name;
- pr " else\n";
- pr " printf (\"\\\\x%%02x\", (unsigned)
%s->%s[i]);\n"
- typ name;
- pr " printf (\"\\n\");\n"
- | name, (FUInt64|FBytes) ->
- pr " printf (\"%%s%s: %%\" PRIu64
\"\\n\", indent, %s->%s);\n"
- name typ name
- | name, FInt64 ->
- pr " printf (\"%%s%s: %%\" PRIi64
\"\\n\", indent, %s->%s);\n"
- name typ name
- | name, FUInt32 ->
- pr " printf (\"%%s%s: %%\" PRIu32
\"\\n\", indent, %s->%s);\n"
- name typ name
- | name, FInt32 ->
- pr " printf (\"%%s%s: %%\" PRIi32
\"\\n\", indent, %s->%s);\n"
- name typ name
- | name, FChar ->
- pr " printf (\"%%s%s: %%c\\n\", indent,
%s->%s);\n"
- name typ name
- | name, FOptPercent ->
- pr " if (%s->%s >= 0)\n" typ name;
- pr " printf (\"%%s%s: %%g %%%%\\n\", indent,
(double) %s->%s);\n"
- name typ name;
- pr " else\n";
- pr " printf (\"%%s%s: \\n\", indent);\n"
name
- ) cols;
- pr "}\n";
- pr "\n";
- ) external_structs;
-
(* Emit a print_TYPE_list function definition only if that function is used.
*)
List.iter (
function
@@ -335,7 +280,8 @@ Guestfish will prompt for these separately."
pr "static void\n";
pr "print_%s (struct guestfs_%s *%s)\n" typ typ typ;
pr "{\n";
- pr " print_%s_indent (%s, \"\");\n" typ typ;
+ pr " guestfs_int_print_%s_indent (%s, stdout, \"\\n\",
\"\");\n"
+ typ typ;
pr "}\n";
pr "\n";
| typ, _ -> () (* empty *)
--
2.5.0
Pino Toscano
2016-Feb-24 12:52 UTC
[Libguestfs] [PATCH 3/3] src: print contents of structs and struct lists on tracing
It eases the debugging, instead of getting just the name of the struct
returned.
---
generator/c.ml | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)
diff --git a/generator/c.ml b/generator/c.ml
index 9af4529..7446412 100644
--- a/generator/c.ml
+++ b/generator/c.ml
@@ -1348,6 +1348,7 @@ and generate_client_actions hash () #include
\"guestfs-internal-actions.h\"
#include \"guestfs_protocol.h\"
#include \"errnostring.h\"
+#include \"structs-print.h\"
";
@@ -1623,7 +1624,7 @@ and generate_client_actions hash ()
let needs_i match ret with
- | RStringList _ | RHashtable _ -> true
+ | RStringList _ | RHashtable _ | RStructList _ -> true
| _ -> false in
if needs_i then (
pr "%s size_t i;\n" indent;
@@ -1656,15 +1657,25 @@ and generate_client_actions hash () pr
"%s }\n" indent;
pr "%s fputs (\"]\", trace_buffer.fp);\n" indent;
| RStruct (_, typ) ->
- (* XXX There is code generated for guestfish for printing
- * these structures. We need to make it generally available
- * for all callers
- *)
- pr "%s fprintf (trace_buffer.fp, \"<struct guestfs_%s
*>\");\n"
- indent typ (* XXX *)
+ pr "%s fprintf (trace_buffer.fp, \"<struct guestfs_%s =
\");\n"
+ indent typ;
+ pr "%s guestfs_int_print_%s_indent (%s, trace_buffer.fp,
\", \", \"\");\n"
+ indent typ rv;
+ pr "%s fprintf (trace_buffer.fp, \">\");\n"
indent
| RStructList (_, typ) ->
- pr "%s fprintf (trace_buffer.fp, \"<struct
guestfs_%s_list *>\");\n"
- indent typ (* XXX *)
+ pr "%s fprintf (trace_buffer.fp, \"<struct
guestfs_%s_list(%%u)\", %s->len);\n"
+ indent typ rv;
+ pr "%s if (%s->len > 0)\n" indent rv;
+ pr "%s fprintf (trace_buffer.fp, \" = \");\n"
indent;
+ pr "%s for (i = 0; i < %s->len; ++i) {\n" indent rv;
+ pr "%s if (i != 0)\n" indent;
+ pr "%s fprintf (trace_buffer.fp, \" \");\n"
indent;
+ pr "%s fprintf (trace_buffer.fp, \"[%%zu]{\",
i);\n" indent;
+ pr "%s guestfs_int_print_%s_indent (&%s->val[i],
trace_buffer.fp, \", \", \"\");\n"
+ indent typ rv;
+ pr "%s fprintf (trace_buffer.fp, \"}\");\n"
indent;
+ pr "%s }\n" indent;
+ pr "%s fprintf (trace_buffer.fp, \">\");\n"
indent
);
pr "%s guestfs_int_trace_send_line (g, &trace_buffer);\n"
indent;
pr "%s}\n" indent;
--
2.5.0
Richard W.M. Jones
2016-Feb-25 12:31 UTC
Re: [Libguestfs] [PATCH 3/3] src: print contents of structs and struct lists on tracing
On Wed, Feb 24, 2016 at 01:52:04PM +0100, Pino Toscano wrote:> It eases the debugging, instead of getting just the name of the struct > returned.The series is fine, so ACK. Definitely improves the trace output :-) A few things that would be good though: - Export the functions through the public API. We already have functions to copy structs (eg. guestfs_copy_application, guestfs_copy_application_list). - Provide another function for printing lists of structs too, so you don't need the loop for RStructList. - With those two changes, you can get rid of the internal structs-print.h header. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top
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