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] <javascript:>> > 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? > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "address-sanitizer" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to [email protected] <javascript:>. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "address-sanitizer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
