80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
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/* drivers/android/kernel_debugger.c
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*
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* Guts of the kernel debugger.
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* Needs something to actually push commands to it.
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*
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* Copyright (C) 2007-2008 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/ctype.h>
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#include <linux/device.h>
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/sysrq.h>
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#include <linux/kernel_debugger.h>
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#define dprintf(fmt...) (ctxt->printf(ctxt->cookie, fmt))
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static void do_ps(struct kdbg_ctxt *ctxt)
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{
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struct task_struct *g, *p;
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unsigned state;
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static const char stat_nam[] = "RSDTtZX";
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dprintf("pid ppid prio task pc\n");
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read_lock(&tasklist_lock);
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do_each_thread(g, p) {
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state = p->state ? __ffs(p->state) + 1 : 0;
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dprintf("%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
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dprintf("%-13.13s %c", p->comm,
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state >= sizeof(stat_nam) ? '?' : stat_nam[state]);
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if (state == TASK_RUNNING)
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dprintf(" running\n");
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else
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dprintf(" %08lx\n", thread_saved_pc(p));
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} while_each_thread(g, p);
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read_unlock(&tasklist_lock);
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}
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int log_buf_copy(char *dest, int idx, int len);
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extern int do_syslog(int type, char __user *bug, int count);
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static void do_sysrq(struct kdbg_ctxt *ctxt, char rq)
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{
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char buf[128];
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int ret;
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int idx = 0;
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do_syslog(5 /* clear */, NULL, 0);
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__handle_sysrq(rq, NULL, 0);
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while (1) {
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ret = log_buf_copy(buf, idx, sizeof(buf) - 1);
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if (ret <= 0)
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break;
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buf[ret] = 0;
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dprintf("%s", buf);
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idx += ret;
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}
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}
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int kernel_debugger(struct kdbg_ctxt *ctxt, char *cmd)
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{
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if (!strcmp(cmd, "ps"))
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do_ps(ctxt);
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if (!strcmp(cmd, "sysrq"))
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do_sysrq(ctxt, 'h');
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if (!strncmp(cmd, "sysrq ", 6))
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do_sysrq(ctxt, cmd[6]);
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return 0;
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}
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