Hi,
How can one find out where the call to GcHEap::Alloc is
originating from?
i had sent a similar mail regarding how to debug in
such cases long time back (ref:help needed wrt debugging, Jul24,2003,
that Barry Bond helped me with). i tried the method that was
suggested. but i am not able to locate the prolog here. and i dont know if
i can use SOS in the Free BSD platform?
i am running the application through gdb (Free BSD) and
doing a backtrace, this is what i get...
Looking at the machine code at #5 in the following output
[ #5 0x290be09d in ?? ()], which is
Dump of assembler code from 0x290be09d to 0x290be19d:
0x290be09d: add $0x8,%esp
0x290be0a0: add $0x4,%esp
0x290be0a3: push %eax
0x290be0a4: mov $0x290b5bc4,%eax
0x290be0a9: push %eax
0x290be0aa: mov $0x28541678,%eax
0x290be0af: call *%eax
0x290be0b1: add $0x4,%esp
0x290be0b4: mov $0x290b564c,%eax
0x290be0b9: push %eax
0x290be0ba: mov $0x28539b50,%eax
0x290be0bf: call *%eax
0x290be0c1: add $0x4,%esp
0x290be0c4: push %eax
0x290be0c5: mov $0x2d0d0568,%eax
0x290be0ca: call *%eax
0x290be0cc: add $0x8,%esp
0x290be0cf: push %esp
0x290be0d0: push %ebp
0x290be0d1: mov $0xc,%eax
0x290be0d6: push %eax
0x290be0d7: mov $0x2d0d02b4,%eax
0x290be0dc: call *%eax
0x290be0de: add $0xc,%esp
0x290be0e1: mov 0xfffffffc(%ebp),%esi
0x290be0e4: mov %ebp,%esp
0x290be0e6: pop %ebp
0x290be0e7: ret
0x290be0e8: add %al,(%eax)
0x290be0ea: add %al,(%eax)
0x290be0ec: add %al,(%eax)
...............
Program received signal SIGTRAP, Trace/breakpoint trap.
0x280cff40 in DBG_DebugBreak () at ../context.c:390
(gdb) bt
#0 0x280cff40 in DBG_DebugBreak () at ../context.c:390
#1 0x28081cb2 in DebugBreak () at ../debug.c:220
#2 0x28737a66 in Alloc (size=16, bFinalize=0, bContainsPointers=0) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../gcscan.cpp:82
#3 0x28513e63 in FastAllocateObject (pMT=0x2909fb94) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../gcscan.cpp:975
#4 0x2853fd70 in JIT_Box (type=0x2909fb94, unboxedData=0xbfbfb254) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../jitinterface.cpp:6737
#5 0x290be09d in ?? ()
#6 0x2834bc05 in donestack () from
/usr/home/archana/fastgc/sscli/build/v1.x86fstchk.rotor/libsscoree.so
#7 0x283e18eb in CallDescrWorker (pSrcEnd=0xbfbfb844, numStackSlots=0,
pArgumentRegisters=0xbfbfb814, pTarget=0x290b5a93) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../class.cpp:9769
#8 0x2854ea3e in MethodDesc::CallDescr (this=0x290b5a98,
pTarget=0x290b5a93 "él\205", pModule=0x81b2c00, pMetaSigOrig=0x290b6b44,
fIsStatic=1, pArguments=0x0) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../method.cpp:740
#9 0x2854e274 in MethodDesc::Call (this=0x290b5a98, pArguments=0x0,
sig=0x290b6b44) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../method.cpp:567
#10 0x283e2a96 in EEClass::RunClassInit (this=0x29047d6c,
pEntry=0x81f9200, pThrowable=0xbfbfc784) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../class.cpp:10010
#11 0x283e322a in EEClass::DoRunClassInitHelper (this=0x29047d6c,
pThrowable=0xbfbfc784, pLocalBlock=0x806cc3c, pEntry=0x81f9200,
fRunClassInit=1) at
/usr/home/archana/fastgc/sscli/clr/src/vm/wks/../class.cpp:10064
...........
thanks & Regards
archana
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