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Extend VERBOSE_SYSINIT to also print out the name of variables passed

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to SYSINIT routines if they can be resolved via symbol look up in DDB.
To avoid false positives, only honor a name if the symbol resolves
exactly to the pointer value (no offset).

MFC after:	1 week
This commit is contained in:
John Baldwin 2012-06-01 15:42:37 +00:00
parent f0a101b7e2
commit b871e6613b
1 changed files with 27 additions and 8 deletions
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35
sys/kern/init_main.c
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@ -158,6 +158,24 @@ sysinit_add(struct sysinit **set, struct sysinit **set_end)
newsysinit_end = newset + count;
}
#if defined (DDB) && defined(VERBOSE_SYSINIT)
static const char *
symbol_name(vm_offset_t va, db_strategy_t strategy)
{
const char *name;
c_db_sym_t sym;
db_expr_t offset;
if (va == 0)
return (NULL);
sym = db_search_symbol(va, strategy, &offset);
if (offset != 0)
return (NULL);
db_symbol_values(sym, &name, NULL);
return (name);
}
#endif
/*
* System startup; initialize the world, create process 0, mount root
* filesystem, and fork to create init and pagedaemon. Most of the
@ -238,15 +256,16 @@ mi_startup(void)
}
if (verbose) {
#if defined(DDB)
const char *name;
c_db_sym_t sym;
db_expr_t offset;
const char *func, *data;
sym = db_search_symbol((vm_offset_t)(*sipp)->func,
DB_STGY_PROC, &offset);
db_symbol_values(sym, &name, NULL);
if (name != NULL)
printf(" %s(%p)... ", name, (*sipp)->udata);
func = symbol_name((vm_offset_t)(*sipp)->func,
DB_STGY_PROC);
data = symbol_name((vm_offset_t)(*sipp)->udata,
DB_STGY_ANY);
if (func != NULL && data != NULL)
printf(" %s(&%s)... ", func, data);
else if (func != NULL)
printf(" %s(%p)... ", func, (*sipp)->udata);
else
#endif
printf(" %p(%p)... ", (*sipp)->func,