> (it is possible if e.g. you have
>uninstrumented code).
Do you mean if we want to test a single process, we must recomplied all the
source code that the process using? In my part, an excutable using lots of
shared lib when it runs as a single process, do we need recompiled all
those shared lib and the excutable code？
>Hard to tell more w/o reproducer.
I can reproduce those errors using my device now at my hands, but it maybe
diffcult for anybody else to reproduce those errors.
在 2014年8月6日星期三UTC+8下午4时52分29秒，kcc写道：
>
> The first one (((free_stack->size)) > ((0))" (0x0, 0x0)) looks like
> asan could not find the stack trace where the first free() happened.
> The second one ("((id)) != (0)" (0x0, 0x0)) is something similar --
> asan fails to find the allocation stack trace.
> In either case this looks like some bug in asan, or maybe a memory
> corruption that asan has missed (it is possible if e.g. you have
> uninstrumented code).
> Hard to tell more w/o reproducer.
>
> On Wed, Aug 6, 2014 at 12:40 PM, ji wang <[email protected]
> <javascript:>> wrote:
> > Hi, kcc
> > Thanks,again haha:)
> > I just simple want to know what thoes errors means, so I can correct it
> , as
> > to my GCC and asan runtime lib was compiled by myself base on Gcc4.9
> source
> > code maybe something went wrong.I think those not right print, may
> happen on
> > muti-thread program? Or any other advices?
> > And PS, Those occurs on my Android device, I've mentioned in other
> > posts,Using asan enable GCC android toolchain to test libstagefright.so
> on
> > my android device, push this recompiled lib and then run monkey test,
> got
> > errors like above.
> >
> >
> > 在 2014年8月6日星期三UTC+8下午2时15分03秒，kcc写道：
> >>
> >> Do you have a reproducer?
> >>
> >> On Wed, Aug 6, 2014 at 6:04 AM, ji wang <[email protected]> wrote:
> >> > First: Double Free
> >> > =================================================================
> >> > ==2415==ERROR: AddressSanitizer: attempting double-free on 0xb4c28b20
> in
> >> > thread T16777215:
> >> > ==2415==AddressSanitizer CHECK failed:
> >> > ../../../.././../gcc/gcc-4.9/libsanitizer/asan/asan_report.cc:586
> >> > "((free_stack->size)) > ((0))" (0x0, 0x0)
> >> > #0 0xb67af94f (/system/lib/libasan.so.1+0x3f94f)
> >> > #1 0xb67b2f8b (/system/lib/libasan.so.1+0x42f8b)
> >> > #2 0xb67ae137 (/system/lib/libasan.so.1+0x3e137
> >> > ...
> >> > ... ...
> >> > According to the asan code, free_stack maybe should not be empty,
> >> > should
> >> > print something like “freed by thread T0 here:... ...previously
> >> > allocated by
> >> > thread T0 here:... ..."
> >> > And of cource It's important, for what reason we may lose this
> part
> >> > log
> >> > print or somethine went wrong on my asan?
> >> >
> >> > Second: UseAfterFree
> >> > =================================================================
> >> > ==4782==ERROR: AddressSanitizer: heap-use-after-free on address
> >> > 0xadb64ff7
> >> > at pc 0xb5916e87 bp 0xb09ff8bc sp 0xb09ff8b4
> >> > WRITE of size 1 at 0xadb64ff7 thread T16777215
> >> > #0 0xb5916e85 (/system/lib/libstagefright.so+0x12ce85)
> >> > #1 0xb59185b3 (/system/lib/libstagefright.so+0x12e5b3)
> >> > ...
> >> >
> >> > 0xadb64ff7 is located 7 bytes inside of 8-byte region
> >> > [0xadb64ff0,0xadb64ff8)
> >> > ==4782==AddressSanitizer CHECK failed:
> >> > ../../../.././../gcc/gcc-4.9/libsanitizer/asan/asan_allocator2.cc:234
> >> > "((id)) != (0)" (0x0, 0x0)
> >> > #0 0xb65cd94f (/system/lib/libasan.so.1+0x3f94f)
> >> > #1 0xb65d0f8b (/system/lib/libasan.so.1+0x42f8b)
> >> > #2 0xb65a2637 (/system/lib/libasan.so.1+0x14637)
> >> > ...
> >> > #6 0xb58ff04f (/system/lib/libstagefright.so+0x12c04f)
> >> > #7 0xb59273d3 (/system/lib/libstagefright.so+0x1543d3)
> >> > This one is the "CHECK(id);" error, what this id for? And more,
> the
> >> > stack printed first and second which I maked red colour is the same,
> >> > this is
> >> > werid, why?
> >> >
> >> > --
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