[PATCH v2 2/2] mi-out: Implement mi redirection using a stack.
Adrian Sendroiu
adrian.sendroiu@freescale.com
Thu Jul 31 16:23:00 GMT 2014
I implemented the test case. A couple of issues I encountered:
- skip_python_tests doesn't work with MI, because it searches for $gdb_prompt.
I implemented another one called mi_skip_python_tests which uses $mi_gdb_prompt.
- executing "python gdb.execute("break main", ... ) directly doesn't work,
because "python" is a cli command, and before running it the current_uiout will
be temporarily changed to cli_uiout, so the first redirection won't be done
on mi_uiout. To bypass this I implemented a small workaround: set a breakpoint,
then set the python command to be executed when the breakpoint hits.
- when running the test on a gdb without the redirection fix, the test will be
reported as UNRESOLVED, because gdb crashes.
--- 8< ---
Subject: [PATCH] mi-out: Implement mi redirection using a stack.
The current implementation doesn't support nested redirections because it only
has an "original_buffer" where it saves the current stream when a redirection is
done. To overcome this limitation, this patch reimplements it using a stack of
streams.
gdb/
2014-07-23 Adrian Sendroiu <adrian.sendroiu@freescale.com>
* mi/mi-out.c (ui_filep): New typedef.
(DEF_VEC_P (ui_filep)): New type.
(struct ui_out_data): <buffer> Remove field.
<original_buffer> Remove field.
<streams>: New field.
(mi_field_string): Get the output stream from the top of the
stack of streams.
(mi_field_fmt): Likewise.
(mi_flush): Likewise.
(field_separator): Likewise.
(mi_open): Likewise.
(mi_close): Likewise.
(mi_out_buffered): Likewise.
(mi_out_rewind): Likewise.
(mi_out_put): Likewise.
(mi_out_new): Initialize the stack of streams. Push a newly
created stream on the stack. Remove obsolete comment.
(mi_redirect): Reimplement using push and pop operations.
gdb/testsuite/
2014-07-30 Adrian Sendroiu <adrian.sendroiu@freescale.com>
* gdb.mi/mi-logging.exp: Add test for nested mi redirection.
* lib/mi-support.exp: (mi_skip_python_tests): New function.
---
gdb/mi/mi-out.c | 77 ++++++++++++++++++++---------------
gdb/testsuite/gdb.mi/mi-logging.exp | 14 +++++++
gdb/testsuite/lib/mi-support.exp | 37 +++++++++++++++++
3 files changed, 95 insertions(+), 33 deletions(-)
diff --git a/gdb/mi/mi-out.c b/gdb/mi/mi-out.c
index 6ec41e6..6731509 100644
--- a/gdb/mi/mi-out.c
+++ b/gdb/mi/mi-out.c
@@ -22,14 +22,17 @@
#include "defs.h"
#include "ui-out.h"
#include "mi-out.h"
+#include "vec.h"
+
+typedef struct ui_file *ui_filep;
+DEF_VEC_P (ui_filep);
struct ui_out_data
{
int suppress_field_separator;
int suppress_output;
int mi_version;
- struct ui_file *buffer;
- struct ui_file *original_buffer;
+ VEC (ui_filep) *streams;
};
typedef struct ui_out_data mi_out_data;
@@ -215,17 +218,20 @@ mi_field_string (struct ui_out *uiout, int fldno, int width,
enum ui_align align, const char *fldname, const char *string)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream;
if (data->suppress_output)
return;
+ stream = VEC_last (ui_filep, data->streams);
+
field_separator (uiout);
if (fldname)
- fprintf_unfiltered (data->buffer, "%s=", fldname);
- fprintf_unfiltered (data->buffer, "\"");
+ fprintf_unfiltered (stream, "%s=", fldname);
+ fprintf_unfiltered (stream, "\"");
if (string)
- fputstr_unfiltered (string, '"', data->buffer);
- fprintf_unfiltered (data->buffer, "\"");
+ fputstr_unfiltered (string, '"', stream);
+ fprintf_unfiltered (stream, "\"");
}
/* This is the only field function that does not align. */
@@ -236,17 +242,20 @@ mi_field_fmt (struct ui_out *uiout, int fldno, int width,
const char *format, va_list args)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream;
if (data->suppress_output)
return;
+ stream = VEC_last (ui_filep, data->streams);
+
field_separator (uiout);
if (fldname)
- fprintf_unfiltered (data->buffer, "%s=\"", fldname);
+ fprintf_unfiltered (stream, "%s=\"", fldname);
else
- fputs_unfiltered ("\"", data->buffer);
- vfprintf_unfiltered (data->buffer, format, args);
- fputs_unfiltered ("\"", data->buffer);
+ fputs_unfiltered ("\"", stream);
+ vfprintf_unfiltered (stream, format, args);
+ fputs_unfiltered ("\"", stream);
}
void
@@ -275,8 +284,9 @@ void
mi_flush (struct ui_out *uiout)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
- gdb_flush (data->buffer);
+ gdb_flush (stream);
}
int
@@ -285,15 +295,9 @@ mi_redirect (struct ui_out *uiout, struct ui_file *outstream)
mi_out_data *data = ui_out_data (uiout);
if (outstream != NULL)
- {
- data->original_buffer = data->buffer;
- data->buffer = outstream;
- }
- else if (data->original_buffer != NULL)
- {
- data->buffer = data->original_buffer;
- data->original_buffer = NULL;
- }
+ VEC_safe_push (ui_filep, data->streams, outstream);
+ else
+ VEC_pop (ui_filep, data->streams);
return 0;
}
@@ -306,29 +310,31 @@ static void
field_separator (struct ui_out *uiout)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
if (data->suppress_field_separator)
data->suppress_field_separator = 0;
else
- fputc_unfiltered (',', data->buffer);
+ fputc_unfiltered (',', stream);
}
static void
mi_open (struct ui_out *uiout, const char *name, enum ui_out_type type)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
field_separator (uiout);
data->suppress_field_separator = 1;
if (name)
- fprintf_unfiltered (data->buffer, "%s=", name);
+ fprintf_unfiltered (stream, "%s=", name);
switch (type)
{
case ui_out_type_tuple:
- fputc_unfiltered ('{', data->buffer);
+ fputc_unfiltered ('{', stream);
break;
case ui_out_type_list:
- fputc_unfiltered ('[', data->buffer);
+ fputc_unfiltered ('[', stream);
break;
default:
internal_error (__FILE__, __LINE__, _("bad switch"));
@@ -339,14 +345,15 @@ static void
mi_close (struct ui_out *uiout, enum ui_out_type type)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
switch (type)
{
case ui_out_type_tuple:
- fputc_unfiltered ('}', data->buffer);
+ fputc_unfiltered ('}', stream);
break;
case ui_out_type_list:
- fputc_unfiltered (']', data->buffer);
+ fputc_unfiltered (']', stream);
break;
default:
internal_error (__FILE__, __LINE__, _("bad switch"));
@@ -360,8 +367,9 @@ void
mi_out_buffered (struct ui_out *uiout, char *string)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
- fprintf_unfiltered (data->buffer, "%s", string);
+ fprintf_unfiltered (stream, "%s", string);
}
/* Clear the buffer. */
@@ -370,8 +378,9 @@ void
mi_out_rewind (struct ui_out *uiout)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *stream = VEC_last (ui_filep, data->streams);
- ui_file_rewind (data->buffer);
+ ui_file_rewind (stream);
}
/* Dump the buffer onto the specified stream. */
@@ -386,9 +395,10 @@ void
mi_out_put (struct ui_out *uiout, struct ui_file *stream)
{
mi_out_data *data = ui_out_data (uiout);
+ struct ui_file *current_stream = VEC_last (ui_filep, data->streams);
- ui_file_put (data->buffer, do_write, stream);
- ui_file_rewind (data->buffer);
+ ui_file_put (current_stream, do_write, stream);
+ ui_file_rewind (current_stream);
}
/* Return the current MI version. */
@@ -407,13 +417,14 @@ struct ui_out *
mi_out_new (int mi_version)
{
int flags = 0;
+ struct ui_file *new_stream;
mi_out_data *data = XNEW (mi_out_data);
data->suppress_field_separator = 0;
data->suppress_output = 0;
data->mi_version = mi_version;
- /* FIXME: This code should be using a ``string_file'' and not the
- TUI buffer hack. */
- data->buffer = mem_fileopen ();
+ data->streams = NULL;
+ new_stream = mem_fileopen ();
+ VEC_safe_push (ui_filep, data->streams, new_stream);
return ui_out_new (&mi_ui_out_impl, data, flags);
}
diff --git a/gdb/testsuite/gdb.mi/mi-logging.exp b/gdb/testsuite/gdb.mi/mi-logging.exp
index d5e4193..063ea97 100644
--- a/gdb/testsuite/gdb.mi/mi-logging.exp
+++ b/gdb/testsuite/gdb.mi/mi-logging.exp
@@ -82,6 +82,20 @@ if [regexp "1001\\^done\[\r\n\]+$mi_log_prompt.*1002\\^running\[\r\n\]+\\*runnin
fail "Redirect log file contents"
}
+# This triggers a nested mi_ui_out redirection, by disabling a breakpoint
+# inside a python command that has to_string = True.
+if ![mi_skip_python_tests] {
+ mi_gdb_test "-break-insert do_nothing" ".*"
+ mi_gdb_test "-break-commands 2 \"python gdb.execute('disable 2', True, True)\"" ".*"
+
+ mi_gdb_test "-exec-continue" ".*"
+
+ set s [string repeat "A" 100]
+
+ # This will crash gdb if redirection is not done properly.
+ mi_gdb_test "echo $s" ".*\\^done" "mi nested redirect"
+}
+
mi_gdb_exit
remote_file host delete $milogfile
diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp
index 204f1e8..23a5b80 100644
--- a/gdb/testsuite/lib/mi-support.exp
+++ b/gdb/testsuite/lib/mi-support.exp
@@ -2491,3 +2491,40 @@ proc mi_make_breakpoint_table {bp_list} {
# Assemble the final regexp.
return "BreakpointTable={nr_rows=\"$nr\",nr_cols=\"$nc\",$header,$body}"
}
+
+proc mi_skip_python_tests {} {
+ global mi_gdb_prompt
+ global gdb_py_is_py3k
+ global gdb_py_is_py24
+
+ gdb_test_multiple "python print ('test')" "verify python support" {
+ -re "not supported.*$mi_gdb_prompt$" {
+ unsupported "Python support is disabled."
+ return 1
+ }
+ -re "$mi_gdb_prompt$" {}
+ }
+
+ set gdb_py_is_py24 0
+ gdb_test_multiple "python print (sys.version_info\[0\])" "check if python 3" {
+ -re "3.*$mi_gdb_prompt$" {
+ set gdb_py_is_py3k 1
+ }
+ -re ".*$mi_gdb_prompt$" {
+ set gdb_py_is_py3k 0
+ }
+
+ }
+ if { $gdb_py_is_py3k == 0 } {
+ gdb_test_multiple "python print (sys.version_info\[1\])" "check if python 2.4" {
+ -re "\[45\].*$mi_gdb_prompt$" {
+ set gdb_py_is_py24 1
+ }
+ -re ".*$mi_gdb_prompt$" {
+ set gdb_py_is_py24 0
+ }
+ }
+ }
+
+ return 0
+}
--
1.7.9.5
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