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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