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[PATCH] Add cpu information to the info os command on linux.
- From: Antoine Tremblay <antoine dot tremblay at ericsson dot com>
- To: <gdb-patches at sourceware dot org>
- Cc: Antoine Tremblay <antoine dot tremblay at ericsson dot com>
- Date: Wed, 25 Mar 2015 13:50:00 -0400
- Subject: [PATCH] Add cpu information to the info os command on linux.
- Authentication-results: sourceware.org; auth=none
This patch adds cpu information on linux based on /proc/cpuinfo as :
cpus Listing of all cpus/cores on the system
This patch also reorders the info os commands so that they are listed
in alphabetical order.
gdb/ChangeLog:
* gdb/nat/linux-osdata.c (linux_xfer_osdata_cpus): New function.
(struct osdata_type): Add cpus entry.
---
gdb/nat/linux-osdata.c | 132 ++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 120 insertions(+), 12 deletions(-)
diff --git a/gdb/nat/linux-osdata.c b/gdb/nat/linux-osdata.c
index 0ed5d34..ba281cc 100644
--- a/gdb/nat/linux-osdata.c
+++ b/gdb/nat/linux-osdata.c
@@ -662,6 +662,112 @@ linux_xfer_osdata_threads (gdb_byte *readbuf,
return len;
}
+/* Collect data about the cpus/cores on the system */
+
+static LONGEST
+linux_xfer_osdata_cpus (gdb_byte *readbuf,
+ ULONGEST offset, ULONGEST len)
+{
+ static const char *buf;
+ static LONGEST len_avail = -1;
+ static struct buffer buffer;
+
+ if (offset == 0)
+ {
+ FILE *fp;
+ int first_item = 1;
+
+ if (len_avail != -1 && len_avail != 0)
+ buffer_free (&buffer);
+ len_avail = 0;
+ buf = NULL;
+ buffer_init (&buffer);
+ buffer_grow_str (&buffer, "<osdata type=\"cpus\">\n");
+
+ fp = gdb_fopen_cloexec ("/proc/cpuinfo", "r");
+ if (fp)
+ {
+ char buf[8192];
+
+ do
+ {
+ if (fgets (buf, sizeof (buf), fp))
+ {
+ char *key, *value;
+ int i = 0;
+
+ key = strtok (buf, ":");
+ if (key == NULL)
+ continue;
+
+ value = strtok (NULL, ":");
+ if (value == NULL)
+ continue;
+
+ while (key[i] != '\t' && key [i] != '\0')
+ {
+ i++;
+ }
+ key[i] = '\0';
+
+ i = 0;
+ while (value[i] != '\t' && value [i] != '\0')
+ {
+ i++;
+ }
+ value[i] = '\0';
+
+ if (strcmp (key, "processor") == 0)
+ {
+ if (first_item == 1)
+ {
+ buffer_grow_str (&buffer, "<item>");
+ }
+ else
+ {
+ buffer_grow_str (&buffer, "</item><item>");
+ }
+ first_item = 0;
+ }
+
+ buffer_xml_printf (
+ &buffer,
+ "<column name=\"%s\">%s</column>",
+ key,
+ value);
+ }
+ }
+ while (!feof (fp));
+
+ if (first_item == 0)
+ {
+ buffer_grow_str (&buffer, "</item>");
+ }
+
+ fclose (fp);
+ }
+
+ buffer_grow_str0 (&buffer, "</osdata>\n");
+ buf = buffer_finish (&buffer);
+ len_avail = strlen (buf);
+ }
+
+ if (offset >= len_avail)
+ {
+ /* Done. Get rid of the buffer. */
+ buffer_free (&buffer);
+ buf = NULL;
+ len_avail = 0;
+ return 0;
+ }
+
+ if (len > len_avail - offset)
+ len = len_avail - offset;
+ memcpy (readbuf, buf + offset, len);
+
+ return len;
+}
+
/* Collect all the open file descriptors found in /proc and put the details
found about them into READBUF. */
@@ -1532,24 +1638,26 @@ struct osdata_type {
char *description;
LONGEST (*getter) (gdb_byte *readbuf, ULONGEST offset, ULONGEST len);
} osdata_table[] = {
+ { "cpus", "CPUs", "Listing of all cpus/cores on the system",
+ linux_xfer_osdata_cpus },
+ { "files", "File descriptors", "Listing of all file descriptors",
+ linux_xfer_osdata_fds },
+ { "modules", "Kernel modules", "Listing of all loaded kernel modules",
+ linux_xfer_osdata_modules },
+ { "msg", "Message queues", "Listing of all message queues",
+ linux_xfer_osdata_msg },
{ "processes", "Processes", "Listing of all processes",
linux_xfer_osdata_processes },
{ "procgroups", "Process groups", "Listing of all process groups",
linux_xfer_osdata_processgroups },
- { "threads", "Threads", "Listing of all threads",
- linux_xfer_osdata_threads },
- { "files", "File descriptors", "Listing of all file descriptors",
- linux_xfer_osdata_fds },
- { "sockets", "Sockets", "Listing of all internet-domain sockets",
- linux_xfer_osdata_isockets },
- { "shm", "Shared-memory regions", "Listing of all shared-memory regions",
- linux_xfer_osdata_shm },
{ "semaphores", "Semaphores", "Listing of all semaphores",
linux_xfer_osdata_sem },
- { "msg", "Message queues", "Listing of all message queues",
- linux_xfer_osdata_msg },
- { "modules", "Kernel modules", "Listing of all loaded kernel modules",
- linux_xfer_osdata_modules },
+ { "shm", "Shared-memory regions", "Listing of all shared-memory regions",
+ linux_xfer_osdata_shm },
+ { "sockets", "Sockets", "Listing of all internet-domain sockets",
+ linux_xfer_osdata_isockets },
+ { "threads", "Threads", "Listing of all threads",
+ linux_xfer_osdata_threads },
{ NULL, NULL, NULL }
};
--
1.9.1