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dyndbg: accept 'file foo.c:func1' and 'file foo.c:10-100'

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Accept these additional query forms:

   echo "file $filestr +_" > control

       path/to/file.c:100	# as from control, column 1
       path/to/file.c:1-100	# or any legal line-range
       path/to/file.c:func_A	# as from an editor/browser
       path/to/file.c:drm_*	# wildcards still work
       path/to/file.c:*_foo	# lead wildcard too

1st 2 examples are treated as line-ranges, 3-5 are treated as func's

Doc these changes, and sprinkle in a few extra wild-card examples and
trailing # explanation texts.

Acked-by: <jbaron@akamai.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200719231058.1586423-14-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jim Cromie
2020-07-19 17:10:53 -06:00
committed by Greg Kroah-Hartman
parent 8037072d81
commit aaebe329bf
2 changed files with 22 additions and 1 deletions
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18
lib/dynamic_debug.c
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@@ -359,6 +359,7 @@ static int ddebug_parse_query(char *words[], int nwords,
{
unsigned int i;
int rc = 0;
char *fline;
/* check we have an even number of words */
if (nwords % 2 != 0) {
@@ -374,7 +375,22 @@ static int ddebug_parse_query(char *words[], int nwords,
if (!strcmp(words[i], "func")) {
rc = check_set(&query->function, words[i+1], "func");
} else if (!strcmp(words[i], "file")) {
rc = check_set(&query->filename, words[i+1], "file");
if (check_set(&query->filename, words[i+1], "file"))
return -EINVAL;
/* tail :$info is function or line-range */
fline = strchr(query->filename, ':');
if (!fline)
break;
*fline++ = '\0';
if (isalpha(*fline) || *fline == '*' || *fline == '?') {
/* take as function name */
if (check_set(&query->function, fline, "func"))
return -EINVAL;
} else {
if (parse_linerange(query, fline))
return -EINVAL;
}
} else if (!strcmp(words[i], "module")) {
rc = check_set(&query->module, words[i+1], "module");
} else if (!strcmp(words[i], "format")) {