Hi Adam,
I changed the D script to as follows.
-----------------------------------------
#!/usr/sbin/dtrace -s
pid$1:libmtmalloc.so.1:malloc:entry
{
self->trace = 1;
self->size = arg0;
}
pid$1:libmtmalloc.so.1:free:entry
/arg0 != 0/
{
printf("\nfree Ptr=0x%p ", arg0);
}
pid$1:libmtmalloc.so.1:malloc_internal:return
/self->size/
{
printf("\nmalloc Ptr=0x%p Size=%d", arg1, self->size);
ustack();
self->size = 0;
self->trace = 0;
}
pid$1:libmtmalloc.so.1:oversize:return
/self->size/
{
printf("\nmalloc Ptr=0x%p Size=%d", arg1, self->size);
ustack();
self->size = 0;
self->trace = 0;
}
-----------------------------------------
But during running it, the error still occured,
-----------------------
# dtrace -qs ./mem2.d 13206
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fdf72000) in action #3
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fdf72000) in action #3
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fdf72000) in action #3
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fdf72000) in action #3
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fd572000) in action #3
dtrace: error on enabled probe ID 3 (ID 49838:
pid13206:libmtmalloc.so.1:malloc_internal:return): invalid address
(0x1fd572000) in action #3
---------------------
The address "0x1fdf72000" apparently is wrong, does "malloc_internal:return"
sometimes return a wrong address ? What is the "action #3" ?
Thanks.
BRs
LiJian
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