From: Jim Cromie <jim.cromie@gmail.com>
To: jbaron@akamai.com, linux-kernel@vger.kernel.org,
akpm@linuxfoundation.org, gregkh@linuxfoundation.org
Cc: linux@rasmusvillemoes.dk, Jim Cromie <jim.cromie@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Petr Mladek <pmladek@suse.com>, Will Deacon <will@kernel.org>,
Orson Zhai <orson.zhai@unisoc.com>,
linux-doc@vger.kernel.org
Subject: [PATCH v3 13/21] dyndbg: accept 'file foo.c:func1' and 'file foo.c:10-100'
Date: Wed, 17 Jun 2020 10:25:26 -0600 [thread overview]
Message-ID: <20200617162536.611386-14-jim.cromie@gmail.com> (raw)
In-Reply-To: <20200617162536.611386-1-jim.cromie@gmail.com>
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, 3,4 are treated as func's
Doc these changes, and sprinkle in a few extra wild-card examples and
trailing # explanation texts.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
.../admin-guide/dynamic-debug-howto.rst | 5 +++++
lib/dynamic_debug.c | 20 ++++++++++++++++++-
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentation/admin-guide/dynamic-debug-howto.rst
index 1423af580bed..6c04aea8f4cd 100644
--- a/Documentation/admin-guide/dynamic-debug-howto.rst
+++ b/Documentation/admin-guide/dynamic-debug-howto.rst
@@ -164,6 +164,7 @@ func
of each callsite. Example::
func svc_tcp_accept
+ func *recv* # in rfcomm, bluetooth, ping, tcp
file
The given string is compared against either the src-root relative
@@ -172,6 +173,9 @@ file
file svcsock.c
file kernel/freezer.c # ie column 1 of control file
+ file drivers/usb/* # all callsites under it
+ file inode.c:start_* # parse :tail as a func (above)
+ file inode.c:1-100 # parse :tail as a line-range (above)
module
The given string is compared against the module name
@@ -181,6 +185,7 @@ module
module sunrpc
module nfsd
+ module drm* # both drm, drm_kms_helper
format
The given string is searched for in the dynamic debug format
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index ae6e523fdecd..7eb963b1bd11 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -321,6 +321,8 @@ static int parse_linerange(struct ddebug_query *query, const char *first)
} else {
query->last_lineno = query->first_lineno;
}
+ vpr_info("parsed line %d-%d\n", query->first_lineno,
+ query->last_lineno);
return 0;
}
@@ -357,6 +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) {
@@ -372,7 +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")) {
--
2.26.2
next prev parent reply other threads:[~2020-06-17 16:26 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-17 16:25 [PATCH v3 00/21] dynamic_debug cleanups, query features, export Jim Cromie
2020-06-17 16:25 ` [PATCH v3 01/21] dyndbg-docs: eschew file /full/path query in docs Jim Cromie
2020-06-17 16:25 ` [PATCH v3 02/21] dyndbg-docs: initialization is done early, not arch Jim Cromie
2020-06-17 16:25 ` [PATCH v3 03/21] dyndbg: drop obsolete comment on ddebug_proc_open Jim Cromie
2020-06-17 16:25 ` [PATCH v3 04/21] dyndbg: refine debug verbosity; 1 is basic, 2 more chatty Jim Cromie
2020-06-17 16:25 ` [PATCH v3 05/21] dyndbg: rename __verbose section to __dyndbg Jim Cromie
2020-06-17 16:25 ` [PATCH v3 06/21] dyndbg: fix overcounting of ram used by dyndbg Jim Cromie
2020-06-17 16:25 ` [PATCH v3 07/21] dyndbg: fix a BUG_ON in ddebug_describe_flags Jim Cromie
2020-06-17 16:25 ` [PATCH v3 08/21] dyndbg: fix pr_err with empty string Jim Cromie
2020-06-17 16:25 ` [PATCH v3 09/21] dyndbg: prefer declarative init in caller, to memset in callee Jim Cromie
2020-06-17 16:25 ` [PATCH v3 10/21] dyndbg: make ddebug_tables list LIFO for add/remove_module Jim Cromie
2020-06-17 16:25 ` [PATCH v3 11/21] dyndbg: use gcc ?: to reduce word count Jim Cromie
2020-06-17 16:25 ` [PATCH v3 12/21] dyndbg: refactor parse_linerange out of ddebug_parse_query Jim Cromie
2020-06-17 16:25 ` Jim Cromie [this message]
2020-06-17 16:25 ` [PATCH v3 14/21] dyndbg: accept query terms like file=bar and module=foo Jim Cromie
2020-06-18 22:25 ` jim.cromie
2020-06-17 16:25 ` [PATCH v3 14/21] dyndbg: accept query terms like file=bar module=foo Jim Cromie
2020-06-17 16:25 ` [PATCH v3 14/21] dyndbg: accept query terms like module:foo and file=bar Jim Cromie
2020-06-17 16:25 ` [PATCH v3 15/21] dyndbg: export ddebug_exec_queries Jim Cromie
2020-06-17 16:25 ` [PATCH v3 16/21] dyndbg: combine flags & mask into a struct, simplify with it Jim Cromie
2020-06-17 16:25 ` [PATCH v3 17/21] dyndbg: refactor ddebug_read_flags out of ddebug_parse_flags Jim Cromie
2020-06-17 16:25 ` [PATCH v3 18/21] dyndbg: add filter channel to the internals Jim Cromie
2020-06-17 16:25 ` [PATCH v3 19/21] dyndbg: extend ddebug_parse_flags to accept optional leading filter-flags Jim Cromie
2020-06-18 12:44 ` Petr Mladek
2020-06-18 14:54 ` jim.cromie
2020-06-18 16:01 ` Petr Mladek
2020-06-17 16:25 ` [PATCH v3 20/21] dyndbg: add user-flag, negating-flags, and filtering on flags Jim Cromie
2020-06-17 22:13 ` Joe Perches
2020-06-17 22:57 ` jim.cromie
2020-06-18 16:19 ` Petr Mladek
2020-06-18 17:40 ` Petr Mladek
2020-06-18 18:17 ` Jason Baron
2020-06-18 19:11 ` jim.cromie
2020-06-18 19:40 ` Jason Baron
2020-06-18 21:31 ` jim.cromie
2020-06-18 22:34 ` Stanimir Varbanov
2020-06-18 22:48 ` jim.cromie
2020-06-19 16:07 ` Jason Baron
2020-06-19 7:45 ` Petr Mladek
2020-06-19 8:10 ` Petr Mladek
2020-06-19 8:34 ` Greg KH
2020-06-18 18:15 ` jim.cromie
2020-06-17 16:25 ` [PATCH v3 21/21] dyndbg: allow negating flag-chars in modifier flags Jim Cromie
2020-06-17 20:05 ` [PATCH v3 00/21] dynamic_debug cleanups, query features, export Rasmus Villemoes
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