48602fcfae
- marks code path that should be unreachable (never executed) - if hit, panics and reports the problem - the end of main() marked as such. The SMP changes need some magic with stack switching before the AP can be started as they need to run on the boot stack before figuring out what is their own stack. As main() uses the boot stack to, we need to switch to to the stack of BSP before executing the last part of main() which needs to be in a separate function so we can jump to it. Therefore restart() won't be the last call in main() which may be confusing. The macro can/should be used in other such places too.
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#ifndef DEBUG_H
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#define DEBUG_H
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/* This header file defines all debugging constants and macros, and declares
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* some variables. Certain debugging features redefine standard constants
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* and macros. Therefore, this header file should be included after the
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* other kernel headers.
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*/
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#include <ansi.h>
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#include <minix/debug.h>
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#include "config.h"
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/* Enable prints such as
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* . send/receive failed due to deadlock or dead source or dead destination
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* . trap not allowed
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* . bogus message pointer
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* . kernel call number not allowed by this process
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*
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* Of course the call still fails, but nothing is printed if these warnings
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* are disabled.
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*/
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#define DEBUG_ENABLE_IPC_WARNINGS 1
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#define DEBUG_STACKTRACE 1
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#define DEBUG_TIME_LOCKS 1
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/* Runtime sanity checking. */
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#define DEBUG_VMASSERT 0
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#define DEBUG_SCHED_CHECK 0
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#define DEBUG_STACK_CHECK 0
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#define DEBUG_TRACE 0
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#if DEBUG_TRACE
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#define VF_SCHEDULING (1L << 1)
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#define VF_PICKPROC (1L << 2)
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#define TRACE(code, statement) if(verboseflags & code) { printf("%s:%d: ", __FILE__, __LINE__); statement }
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#else
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#define TRACE(code, statement)
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#endif
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#define NOREC_ENTER(varname) \
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static int varname = 0; \
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int mustunlock = 0; \
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if(!intr_disabled()) { lock; mustunlock = 1; } \
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if(varname) { \
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minix_panic(#varname " recursive enter", __LINE__); \
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} \
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varname = 1;
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#define NOREC_RETURN(varname, v) do { \
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if(!varname) \
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minix_panic(#varname " flag off", __LINE__); \
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if(!intr_disabled()) \
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minix_panic(#varname " interrupts on", __LINE__); \
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varname = 0; \
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if(mustunlock) { unlock; } \
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return v; \
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} while(0)
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#if DEBUG_VMASSERT
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#define vmassert(t) { \
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if(!(t)) { minix_panic("vm: assert " #t " failed\n", __LINE__); } }
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#else
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#define vmassert(t) { }
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#endif
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#define NOT_REACHABLE(__x) do { \
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kprintf("NOT_REACHABLE at %s:%d\n", __FILE__, __LINE__); \
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minix_panic("execution at an unexpected location\n", NO_NUM); \
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for(;;); \
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} while(0)
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#endif /* DEBUG_H */
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