Add a new 'why' argument to kdb_enter(), and a set of constants to use
for that argument. This will allow DDB to detect the broad category of reason why the debugger has been entered, which it can use for the purposes of deciding which DDB script to run. Assign approximate why values to all current consumers of the kdb_enter() interface.
This commit is contained in:
parent
6862d27ecd
commit
3de213cc00
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=174898
@ -1277,7 +1277,8 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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kdb_enter(KDB_WHY_BOOTFLAGS,
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"Boot flags requested debugger");
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#endif
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identify_cpu(); /* Final stage of CPU initialization */
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@ -203,7 +203,7 @@ ap_watchdog(u_int cpuid)
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if (watchdog_nmi)
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watchdog_ipi_nmi();
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else
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kdb_enter("mp_watchdog");
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kdb_enter(KDB_WHY_WATCHDOG, "mp_watchdog");
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}
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}
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bcopy(old_pcomm, p->p_comm, MAXCOMLEN + 1);
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@ -508,7 +508,7 @@ at91_rx_put(struct uart_softc *sc, int key)
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#if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
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if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
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if (kdb_alt_break(key, &sc->sc_altbrk))
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kdb_enter("Break sequence to console");
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kdb_enter(KDB_WHY_BREAK, "Break sequence to console");
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}
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#endif
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uart_rx_put(sc, key);
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@ -87,7 +87,7 @@
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#ifdef __FreeBSD__
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#undef MSG_IDENTIFY
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#define SCSI_LOW_DEBUGGER(dev) kdb_enter(dev)
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#define SCSI_LOW_DEBUGGER(dev) kdb_enter(KDB_WHY_CAM, dev)
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#define SCSI_LOW_DELAY(mu) DELAY((mu))
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#define SCSI_LOW_SPLSCSI splcam
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#define SCSI_LOW_BZERO(pt, size) bzero((pt), (size))
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@ -3632,7 +3632,7 @@ DbgBreakPoint(void)
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#if __FreeBSD_version < 502113
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Debugger("DbgBreakPoint(): breakpoint");
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#else
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kdb_enter("DbgBreakPoint(): breakpoint");
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kdb_enter(KDB_WHY_NDIS, "DbgBreakPoint(): breakpoint");
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#endif
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}
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@ -73,13 +73,13 @@ AcpiOsSignal(UINT32 Function, void *Info)
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printf("ACPI fatal signal, type 0x%x code 0x%x argument 0x%x",
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fatal->Type, fatal->Code, fatal->Argument);
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#ifdef ACPI_DEBUG
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kdb_enter("AcpiOsSignal");
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kdb_enter(KDB_WHY_ACPI, "AcpiOsSignal");
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#endif
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break;
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case ACPI_SIGNAL_BREAKPOINT:
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#ifdef ACPI_DEBUG
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kdb_enter((char *)Info);
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kdb_enter(KDB_WHY_ACPI, (char *)Info);
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#endif
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break;
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@ -207,11 +207,13 @@ dcons_check_break(struct dcons_softc *dc, int c)
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#ifdef GDB
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if (gdb_cur == &dcons_gdb_dbgport) {
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kdb_dbbe_select("gdb");
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kdb_enter("Break sequence on dcons gdb port");
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kdb_enter(KDB_WHY_BREAK,
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"Break sequence on dcons gdb port");
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}
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#endif
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} else
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kdb_enter("Break sequence on dcons console port");
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kdb_enter(KDB_WHY_BREAK,
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"Break sequence on dcons console port");
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}
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#else
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switch (dc->brk_state) {
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@ -282,7 +282,7 @@ ofw_cngetc(struct consdev *cp)
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if (OF_read(stdin, &ch, 1) > 0) {
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#if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
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if (kdb_alt_break(ch, &alt_break_state))
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK, "Break sequence on console");
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#endif
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return (ch);
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}
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@ -1502,7 +1502,8 @@ siointr1(com)
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#ifdef ALT_BREAK_TO_DEBUGGER
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if (com->unit == comconsole &&
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kdb_alt_break(recv_data, &com->alt_brk_state) != 0)
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK,
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"Break sequence on console");
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#endif /* ALT_BREAK_TO_DEBUGGER */
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#endif /* KDB */
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if (line_status & (LSR_BI | LSR_FE | LSR_PE)) {
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@ -1521,7 +1522,8 @@ siointr1(com)
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if (line_status & LSR_BI) {
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#if defined(KDB) && defined(BREAK_TO_DEBUGGER)
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if (com->unit == comconsole) {
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kdb_enter("Line break on console");
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kdb_enter(KDB_WHY_BREAK,
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"Line break on console");
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goto cont;
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}
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#endif
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@ -3373,7 +3373,7 @@ scgetc(sc_softc_t *sc, u_int flags)
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case DBG:
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#ifndef SC_DISABLE_KDBKEY
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if (enable_kdbkey)
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kdb_enter("manual escape to debugger");
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kdb_enter(KDB_WHY_BREAK, "manual escape to debugger");
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#endif
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break;
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@ -122,7 +122,7 @@ uart_intr_break(void *arg)
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#if defined(KDB) && defined(BREAK_TO_DEBUGGER)
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if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
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kdb_enter("Line break on console");
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kdb_enter(KDB_WHY_BREAK, "Line break on console");
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return (0);
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}
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#endif
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@ -176,7 +176,8 @@ uart_intr_rxready(void *arg)
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if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
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while (rxp != sc->sc_rxput) {
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if (kdb_alt_break(sc->sc_rxbuf[rxp++], &sc->sc_altbrk))
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK,
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"Break sequence on console");
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if (rxp == sc->sc_rxbufsz)
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rxp = 0;
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}
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@ -1062,7 +1062,8 @@ unionfs_checkuppervp(struct vnode *vp, char *fil, int lno)
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if (vp->v_op != unionfs_vnodeop_p) {
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printf("unionfs_checkuppervp: on non-unionfs-node.\n");
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#ifdef KDB
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kdb_enter("unionfs_checkuppervp: on non-unionfs-node.\n");
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kdb_enter(KDB_WHY_UNIONFS,
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"unionfs_checkuppervp: on non-unionfs-node.\n");
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#endif
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panic("unionfs_checkuppervp");
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};
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@ -1081,7 +1082,8 @@ unionfs_checklowervp(struct vnode *vp, char *fil, int lno)
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if (vp->v_op != unionfs_vnodeop_p) {
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printf("unionfs_checklowervp: on non-unionfs-node.\n");
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#ifdef KDB
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kdb_enter("unionfs_checklowervp: on non-unionfs-node.\n");
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kdb_enter(KDB_WHY_UNIONFS,
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"unionfs_checklowervp: on non-unionfs-node.\n");
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#endif
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panic("unionfs_checklowervp");
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};
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@ -2275,7 +2275,7 @@ init386(first)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
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#endif
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finishidentcpu(); /* Final stage of CPU initialization */
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@ -203,7 +203,7 @@ ap_watchdog(u_int cpuid)
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if (watchdog_nmi)
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watchdog_ipi_nmi();
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else
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kdb_enter("mp_watchdog");
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kdb_enter(KDB_WHY_WATCHDOG, "mp_watchdog");
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}
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}
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bcopy(old_pcomm, p->p_comm, MAXCOMLEN + 1);
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@ -824,7 +824,8 @@ ia64_init(void)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger\n");
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kdb_enter(KDB_WHY_BOOTFLAGS,
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"Boot flags requested debugger\n");
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#endif
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ia64_set_tpr(0);
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@ -637,7 +637,7 @@ watchdog_fire(void)
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#if defined(KDB) && !defined(KDB_UNATTENDED)
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kdb_backtrace();
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kdb_enter("watchdog timeout");
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kdb_enter(KDB_WHY_WATCHDOG, "watchdog timeout");
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#else
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panic("watchdog timeout");
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#endif
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@ -544,7 +544,7 @@ panic(const char *fmt, ...)
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if (newpanic && trace_on_panic)
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kdb_backtrace();
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if (debugger_on_panic)
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kdb_enter("panic");
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kdb_enter(KDB_WHY_PANIC, "panic");
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#ifdef RESTARTABLE_PANICS
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/* See if the user aborted the panic, in which case we continue. */
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if (panicstr == NULL) {
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@ -97,6 +97,11 @@ SYSCTL_INT(_debug_kdb, OID_AUTO, stop_cpus, CTLTYPE_INT | CTLFLAG_RW,
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TUNABLE_INT("debug.kdb.stop_cpus", &kdb_stop_cpus);
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#endif
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/*
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* Flag to indicate to debuggers why the debugger was entered.
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*/
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const char * volatile kdb_why = KDB_WHY_UNSET;
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static int
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kdb_sysctl_available(SYSCTL_HANDLER_ARGS)
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{
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@ -163,7 +168,7 @@ kdb_sysctl_enter(SYSCTL_HANDLER_ARGS)
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return (error);
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if (kdb_active)
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return (EBUSY);
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kdb_enter("sysctl debug.kdb.enter");
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kdb_enter(KDB_WHY_SYSCTL, "sysctl debug.kdb.enter");
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return (0);
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}
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@ -295,17 +300,20 @@ kdb_dbbe_select(const char *name)
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* Enter the currently selected debugger. If a message has been provided,
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* it is printed first. If the debugger does not support the enter method,
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* it is entered by using breakpoint(), which enters the debugger through
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* kdb_trap().
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* kdb_trap(). The 'why' argument will contain a more mechanically usable
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* string than 'msg', and is relied upon by DDB scripting to identify the
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* reason for entering the debugger so that the right script can be run.
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*/
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void
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kdb_enter(const char *msg)
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kdb_enter(const char *why, const char *msg)
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{
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if (kdb_dbbe != NULL && kdb_active == 0) {
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if (msg != NULL)
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printf("KDB: enter: %s\n", msg);
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kdb_why = why;
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breakpoint();
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kdb_why = KDB_WHY_UNSET;
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}
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}
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@ -1123,7 +1123,7 @@ witness_checkorder(struct lock_object *lock, int flags, const char *file,
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if (witness_trace)
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kdb_backtrace();
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if (witness_kdb)
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kdb_enter(__func__);
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kdb_enter(KDB_WHY_WITNESS, __func__);
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#endif
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}
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@ -1396,7 +1396,7 @@ witness_warn(int flags, struct lock_object *lock, const char *fmt, ...)
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panic("witness_warn");
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#ifdef KDB
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else if (witness_kdb && n)
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kdb_enter(__func__);
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kdb_enter(KDB_WHY_WITNESS, __func__);
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else if (witness_trace && n)
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kdb_backtrace();
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#endif
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@ -3456,7 +3456,7 @@ vfs_badlock(const char *msg, const char *str, struct vnode *vp)
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if (vfs_badlock_print)
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printf("%s: %p %s\n", str, (void *)vp, msg);
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if (vfs_badlock_ddb)
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kdb_enter("lock violation");
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kdb_enter(KDB_WHY_VFSLOCK, "lock violation");
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}
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void
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@ -3576,7 +3576,7 @@ vop_strategy_pre(void *ap)
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printf(
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"VOP_STRATEGY: bp is not locked but should be\n");
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if (vfs_badlock_ddb)
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kdb_enter("lock violation");
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kdb_enter(KDB_WHY_VFSLOCK, "lock violation");
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}
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#endif
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}
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@ -3465,12 +3465,12 @@ ng_setisr(node_p node)
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do { \
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if (NGI_NODE(item) ) { \
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printf("item already has node"); \
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kdb_enter("has node"); \
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kdb_enter(KDB_WHY_NETGRAPH, "has node"); \
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NGI_CLR_NODE(item); \
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} \
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if (NGI_HOOK(item) ) { \
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printf("item already has hook"); \
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kdb_enter("has hook"); \
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kdb_enter(KDB_WHY_NETGRAPH, "has hook"); \
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NGI_CLR_HOOK(item); \
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} \
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} while (0)
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@ -2369,7 +2369,8 @@ status_read:;
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#ifdef ALT_BREAK_TO_DEBUGGER
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if (com->unit == comconsole &&
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kdb_alt_break(recv_data, &com->alt_brk_state) != 0)
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK,
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"Break sequence on console");
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#endif /* ALT_BREAK_TO_DEBUGGER */
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#endif /* KDB */
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if (line_status & (LSR_BI | LSR_FE | LSR_PE)) {
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@ -2388,7 +2389,8 @@ status_read:;
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if (line_status & LSR_BI) {
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#if defined(KDB) && defined(BREAK_TO_DEBUGGER)
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if (com->unit == comconsole) {
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kdb_enter("Line break on console");
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kdb_enter(KDB_WHY_BREAK,
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"Line break on console");
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goto cont;
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}
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#endif
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@ -2061,7 +2061,7 @@ init386(first)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
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#endif
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finishidentcpu(); /* Final stage of CPU initialization */
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|
@ -398,7 +398,8 @@ powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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kdb_enter(KDB_WHY_BOOTFLAGS,
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"Boot flags requested debugger");
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#endif
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}
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|
@ -139,6 +139,6 @@ pswitch_intr(void *arg)
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dev = (device_t)arg;
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kdb_enter(device_get_nameunit(dev));
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kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev));
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return (FILTER_HANDLED);
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}
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|
@ -117,7 +117,7 @@ SYSCTL_NODE(_security_mac_test, OID_AUTO, counter, CTLFLAG_RW, 0,
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#define COUNTER_INC(variable) atomic_add_int(&counter_##variable, 1)
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#ifdef KDB
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#define DEBUGGER(func, string) kdb_enter((string))
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#define DEBUGGER(func, string) kdb_enter(KDB_WHY_MAC, (string))
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#else
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#define DEBUGGER(func, string) printf("mac_test: %s: %s\n", (func), (string))
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#endif
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|
@ -850,7 +850,7 @@ psycho_powerfail(void *arg)
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#ifdef DEBUGGER_ON_POWERFAIL
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struct psycho_softc *sc = arg;
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kdb_enter("powerfail");
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kdb_enter(KDB_WHY_POWERFAIL, "powerfail");
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#else
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static int shutdown;
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|
@ -448,7 +448,7 @@ sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
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#endif
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}
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|
@ -289,7 +289,7 @@ trap(struct trapframe *tf)
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}
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if (debugger_on_signal &&
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(sig == 4 || sig == 10 || sig == 11))
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kdb_enter("trapsig");
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kdb_enter(KDB_WHY_TRAPSIG, "trapsig");
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ksiginfo_init_trap(&ksi);
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ksi.ksi_signo = sig;
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ksi.ksi_code = (int)tf->tf_type; /* XXX not POSIX */
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|
@ -224,10 +224,10 @@ hvcn_cngetc(struct consdev *cp)
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while ((l = hv_cons_getchar(&ch)) != H_EOK) {
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#if defined(KDB)
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if (l == H_BREAK || l == H_HUP)
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK, "Break sequence on console");
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if (kdb_alt_break(ch, &alt_break_state))
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK, "Break sequence on console");
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#endif
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if (l != -2 && l != 0) {
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return (-1);
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@ -248,9 +248,9 @@ hvcn_cncheckc(struct consdev *cp)
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if ((l = hv_cons_getchar(&ch)) == H_EOK) {
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#if defined(KDB)
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if (l == H_BREAK || l == H_HUP)
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kdb_enter("Break sequence on console");
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kdb_enter(KDB_WHY_BREAK, "Break sequence on console");
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if (kdb_alt_break(ch, &alt_break_state))
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||||
kdb_enter("Break sequence on console");
|
||||
kdb_enter(KDB_WHY_BREAK, "Break sequence on console");
|
||||
#endif
|
||||
return (ch);
|
||||
}
|
||||
|
@ -510,7 +510,7 @@ sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec)
|
||||
|
||||
#ifdef KDB
|
||||
if (boothowto & RB_KDB)
|
||||
kdb_enter("Boot flags requested debugger");
|
||||
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
|
||||
#endif
|
||||
BVPRINTF("sparc64_init done\n");
|
||||
}
|
||||
|
@ -366,7 +366,7 @@ trap(struct trapframe *tf, int64_t type, uint64_t data)
|
||||
}
|
||||
if (debugger_on_signal &&
|
||||
(sig == 4 || sig == 10 || sig == 11))
|
||||
kdb_enter("trapsig");
|
||||
kdb_enter(KDB_WHY_TRAPSIG, "trapsig");
|
||||
#ifdef VERBOSE
|
||||
if (sig == 4 || sig == 10 || sig == 11)
|
||||
printf("trap: %ld:%s: 0x%lx at 0x%lx on cpu=%d sig=%d proc=%s\n",
|
||||
|
@ -66,7 +66,7 @@ extern struct thread *kdb_thread; /* Current thread. */
|
||||
int kdb_alt_break(int, int *);
|
||||
void kdb_backtrace(void);
|
||||
int kdb_dbbe_select(const char *);
|
||||
void kdb_enter(const char *);
|
||||
void kdb_enter(const char *, const char *);
|
||||
void kdb_init(void);
|
||||
void * kdb_jmpbuf(jmp_buf);
|
||||
void kdb_reenter(void);
|
||||
@ -78,4 +78,31 @@ struct thread *kdb_thr_next(struct thread *);
|
||||
int kdb_thr_select(struct thread *);
|
||||
int kdb_trap(int, int, struct trapframe *);
|
||||
|
||||
/*
|
||||
* KDB enters the debugger via breakpoint(), which leaves the debugger without
|
||||
* a lot of information about why it was entered. This simple enumerated set
|
||||
* captures some basic information.
|
||||
*
|
||||
* It is recommended that values here be short (<16 character) alpha-numeric
|
||||
* strings, as they will be used to construct DDB(4) script names.
|
||||
*/
|
||||
extern const char * volatile kdb_why;
|
||||
#define KDB_WHY_UNSET NULL /* No reason set. */
|
||||
#define KDB_WHY_PANIC "panic" /* panic() was called. */
|
||||
#define KDB_WHY_SYSCTL "sysctl" /* Sysctl entered debugger. */
|
||||
#define KDB_WHY_BOOTFLAGS "bootflags" /* Boot flags were set. */
|
||||
#define KDB_WHY_WITNESS "witness" /* Witness entered debugger. */
|
||||
#define KDB_WHY_VFSLOCK "vfslock" /* VFS detected lock problem. */
|
||||
#define KDB_WHY_NETGRAPH "netgraph" /* Netgraph entered debugger. */
|
||||
#define KDB_WHY_BREAK "break" /* Console or serial break. */
|
||||
#define KDB_WHY_WATCHDOG "watchdog" /* Watchdog entered debugger. */
|
||||
#define KDB_WHY_CAM "cam" /* CAM has entered debugger. */
|
||||
#define KDB_WHY_NDIS "ndis" /* NDIS entered debugger. */
|
||||
#define KDB_WHY_ACPI "acpi" /* ACPI entered debugger. */
|
||||
#define KDB_WHY_TRAPSIG "trapsig" /* Sun4v/Sparc fault. */
|
||||
#define KDB_WHY_POWERFAIL "powerfail" /* Powerfail NMI. */
|
||||
#define KDB_WHY_MAC "mac" /* MAC Framework. */
|
||||
#define KDB_WHY_POWERPC "powerpc" /* Unhandled powerpc intr. */
|
||||
#define KDB_WHY_UNIONFS "unionfs" /* Unionfs bug. */
|
||||
|
||||
#endif /* !_SYS_KDB_H_ */
|
||||
|
Loading…
Reference in New Issue
Block a user