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Break file descriptor printing logic out of db_show_files() into

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db_print_file(), and add a new "show file <ptr>" DDB command, which can
be used to print out file descriptors referenced in stack traces.
This commit is contained in:
Robert Watson 2007-02-15 10:50:48 +00:00
parent f58dd47091
commit 442f65e958
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=166747
1 changed files with 32 additions and 9 deletions
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41
sys/kern/kern_descrip.c
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@ -2577,20 +2577,43 @@ file_to_first_proc(struct file *fp)
return (NULL);
}
static void
db_print_file(struct file *fp, int header)
{
struct proc *p;
if (header)
db_printf("%8s %4s %8s %8s %4s %5s %6s %8s %5s %12s\n",
"File", "Type", "Data", "Flag", "GCFl", "Count",
"MCount", "Vnode", "FPID", "FCmd");
p = file_to_first_proc(fp);
db_printf("%8p %4s %8p %08x %04x %5d %6d %8p %5d %12s\n", fp,
file_type_to_name(fp->f_type), fp->f_data, fp->f_flag,
fp->f_gcflag, fp->f_count, fp->f_msgcount, fp->f_vnode,
p != NULL ? p->p_pid : -1, p != NULL ? p->p_comm : "-");
}
DB_SHOW_COMMAND(file, db_show_file)
{
struct file *fp;
if (!have_addr) {
db_printf("usage: show file <addr>\n");
return;
}
fp = (struct file *)addr;
db_print_file(fp, 1);
}
DB_SHOW_COMMAND(files, db_show_files)
{
struct file *fp;
struct proc *p;
int header;
db_printf("%8s %4s %8s %8s %4s %5s %6s %8s %5s %12s\n", "File",
"Type", "Data", "Flag", "GCFl", "Count", "MCount", "Vnode",
"FPID", "FCmd");
header = 1;
LIST_FOREACH(fp, &filehead, f_list) {
p = file_to_first_proc(fp);
db_printf("%8p %4s %8p %08x %04x %5d %6d %8p %5d %12s\n", fp,
file_type_to_name(fp->f_type), fp->f_data, fp->f_flag,
fp->f_gcflag, fp->f_count, fp->f_msgcount, fp->f_vnode,
p != NULL ? p->p_pid : -1, p != NULL ? p->p_comm : "-");
db_print_file(fp, header);
header = 0;
}
}
#endif