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Bypass debug I/O locks during kernel panic or debugger session

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This commit is contained in:
Aiken Harris
2026-06-07 22:37:59 +02:00
parent 47d4069d6f
commit 43265bcddb
1 changed files with 8 additions and 4 deletions
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12
xtoskrnl/kd/dbgio.cc
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@@ -57,12 +57,16 @@ VOID
KD::DebugIo::DbgPrint(PCWSTR Format, KD::DebugIo::DbgPrint(PCWSTR Format,
VA_LIST Arguments) VA_LIST Arguments)
{ {
PLIST_ENTRY DispatchTableEntry;
PKD_DISPATCH_TABLE DispatchTable; PKD_DISPATCH_TABLE DispatchTable;
PLIST_ENTRY DispatchTableEntry;
BOOLEAN BypassLocks;
/* Raise runlevel and acquire the Debug I/O lock */ /* Evaluate if the system is currently in a critical or debugging state */
KE::RaiseRunLevel RunLevel(HIGH_LEVEL); BypassLocks = (KE::Crash::SystemCrashed() || KD::Debugger::DebuggerActive());
KE::SpinLockGuard SpinLock(&DebugIoLock);
/* Conditionally raise runlevel and acquire the Debug I/O lock */
KE::RaiseRunLevel RunLevel(HIGH_LEVEL, !BypassLocks);
KE::SpinLockGuard SpinLock(&DebugIoLock, !BypassLocks);
/* Iterate over all registered debug providers */ /* Iterate over all registered debug providers */
DispatchTableEntry = Providers.Flink; DispatchTableEntry = Providers.Flink;