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authorJim Cromie <jim.cromie@gmail.com>2020-07-20 01:10:53 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-07-24 17:00:09 +0200
commitaaebe329bff0d84e04e74915a828b12a40b55456 (patch)
treed8440bb2d55d99e06b199eef131e857e6d4ab801 /lib
parentdyndbg: refactor parse_linerange out of ddebug_parse_query (diff)
downloadlinux-aaebe329bff0d84e04e74915a828b12a40b55456.tar.xz
linux-aaebe329bff0d84e04e74915a828b12a40b55456.zip
dyndbg: accept 'file foo.c:func1' and 'file foo.c:10-100'
Accept these additional query forms: echo "file $filestr +_" > control path/to/file.c:100 # as from control, column 1 path/to/file.c:1-100 # or any legal line-range path/to/file.c:func_A # as from an editor/browser path/to/file.c:drm_* # wildcards still work path/to/file.c:*_foo # lead wildcard too 1st 2 examples are treated as line-ranges, 3-5 are treated as func's Doc these changes, and sprinkle in a few extra wild-card examples and trailing # explanation texts. Acked-by: <jbaron@akamai.com> Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Link: https://lore.kernel.org/r/20200719231058.1586423-14-jim.cromie@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/dynamic_debug.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 7a66d5e07f41..7eb963b1bd11 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -359,6 +359,7 @@ static int ddebug_parse_query(char *words[], int nwords,
{
unsigned int i;
int rc = 0;
+ char *fline;
/* check we have an even number of words */
if (nwords % 2 != 0) {
@@ -374,7 +375,22 @@ static int ddebug_parse_query(char *words[], int nwords,
if (!strcmp(words[i], "func")) {
rc = check_set(&query->function, words[i+1], "func");
} else if (!strcmp(words[i], "file")) {
- rc = check_set(&query->filename, words[i+1], "file");
+ if (check_set(&query->filename, words[i+1], "file"))
+ return -EINVAL;
+
+ /* tail :$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")) {