bde 2003/03/24 02:17:14 PST
FreeBSD src repository
Disable interrupts while in kdb_trap() to handle cases where the caller
doesn't do it. This fixes all known causes of "Context switches not
allowed in the debugger" in mi_switch(). The main cause was trap_fatal()
calling kdb_trap() with interrupts enabled. Switching to ithreads for
interrupt handling then made fatal traps more fatal and harder to debug.
The problem was limited in -current because most interrupt handlers are
blocked by Giant, but it occurred almost deterministically for me because
my clock interrupt handlers are non-fast and not blocked by Giant.
Revision Changes Path
1.71 +7 -0 src/sys/i386/i386/db_interface.c
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