Re: [Valgrind-users] 答复: [HELP] Android use LD to link the program but the valgrind can not report malloc leak;

2019-04-09 Thread John Reiser 

On 4/8/19 4:54 PM, Wuweijia wrote:

localhost:/system/bin # ./valgrind -v --undef-value-errors=no  ./test
==30806== Memcheck, a memory error detector
==30806== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==30806== Using Valgrind-3.14.0-353a3587bb-20181007X and LibVEX; rerun with -h 
for copyright info



linker: Warning: "/system_Q_EA3/lib64/valgrind/vgpreload_core-arm64-linux.so" 
has unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
WARNING: linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_core-arm64-linux.so" has unsupported 
flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_memcheck-arm64-linux.so" has 
unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
WARNING: linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_memcheck-arm64-linux.so" has 
unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)


Please visit https://bugs.kde.org/show_bug.cgi?id=406349
and enter the version of Android and/or /system_Q_EA3/bin/linker64
into an Additional Comment.  Also please attach the source code
of the test program ./test to the valgrind bug report.

The Android run-time linker /system_Q_EA3/bin/linker64
does not understand important flags in the DF_FLAGS_1
data item of the PT_DYNAMIC "segment" of
/lib64/valgrind/vgpreload_core-arm64-linux.so
and other valgrind shared libraries.
As a result, memcheck does not re-direct nor intercept calls
to malloc() or free().  This cripples memcheck.


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[Valgrind-users] 答复: [HELP] Android use LD to link the program but the valgrind can not report malloc leak;

2019-04-08 Thread Wuweijia 
localhost:/system/bin # ./valgrind -v --undef-value-errors=no  ./test
==30806== Memcheck, a memory error detector
==30806== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==30806== Using Valgrind-3.14.0-353a3587bb-20181007X and LibVEX; rerun with -h 
for copyright info
==30806== Command: ./test
==30806==
--30806-- Valgrind options:
--30806---v
--30806----undef-value-errors=no
--30806-- Contents of /proc/version:
--30806--   Linux version 4.4.7+ (root@baixin-HP-Compaq-8200-Elite-MT-PC) (gcc 
version 4.9.3 20151223 (prerelease) (SDK V100R005C00SPC030B080) ) #1 SMP 
PREEMPT Fri Sep 9 14:57:05 CST 2016
--30806--
--30806-- Arch and hwcaps: ARM64, LittleEndian, baseline
--30806-- Page sizes: currently 4096, max supported 65536
--30806-- Valgrind library directory: /system/lib64/valgrind
--30806-- Reading syms from /system_Q_EA3/bin/test
--30806-- Reading syms from /system_Q_EA3/bin/linker64
--30806-- Scheduler: using generic scheduler lock implementation.
--30806-- Reading suppressions file: /system/lib64/valgrind/default.supp
--30806-- Reading syms from /system_Q_EA3/lib64/libm.so
linker: Warning: "/system_Q_EA3/lib64/valgrind/vgpreload_core-arm64-linux.so" 
has unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
WARNING: linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_core-arm64-linux.so" has unsupported 
flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_memcheck-arm64-linux.so" has 
unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
WARNING: linker: Warning: 
"/system_Q_EA3/lib64/valgrind/vgpreload_memcheck-arm64-linux.so" has 
unsupported flags DT_FLAGS_1=0x421 (ignoring unsupported flags)
new lld  p=0x5613000
==30806==
==30806== HEAP SUMMARY:
==30806== in use at exit: 0 bytes in 0 blocks
==30806==   total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==30806==
==30806== All heap blocks were freed -- no leaks are possible
==30806==
==30806== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==30806== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)


ocalhost:/system/bin # readelf -d ../lib64/libc.so

Dynamic section at offset 0x15ee20 contains 28 entries:
  TagType Name/Value
 0x0001 (NEEDED) Shared library: [ld-android.so]
 0x0001 (NEEDED) Shared library: [libdl.so]
 0x000e (SONAME) Library soname: [libc.so]
 0x001e (FLAGS)  BIND_NOW
 0x6ffb (FLAGS_1)Flags: NOW
 0x0007 (RELA)   0xf188
 0x0008 (RELASZ) 39288 (bytes)
 0x0009 (RELAENT)24 (bytes)
 0x6ff9 (RELACOUNT)  1575
 0x0017 (JMPREL) 0x18b00
 0x0002 (PLTRELSZ)   13776 (bytes)
 0x0003 (PLTGOT) 0x15f390
 0x0014 (PLTREL) RELA
 0x0006 (SYMTAB) 0x270
 0x000b (SYMENT) 24 (bytes)
 0x0005 (STRTAB) 0xb1c4
 0x000a (STRSZ)  16323 (bytes)
 0x6ef5 (GNU_HASH)   0x8f10
 0x0019 (INIT_ARRAY) 0x15edf8
 0x001b (INIT_ARRAYSZ)   40 (bytes)
 0x001a (FINI_ARRAY) 0x15a000
 0x001c (FINI_ARRAYSZ)   16 (bytes)
 0x6ff0 (VERSYM) 0x8328
 0x6ffc (VERDEF) 0x8de4
 0x6ffd (VERDEFNUM)  9
 0x6ffe (VERNEED)0x8ee0
 0x6fff (VERNEEDNUM) 1
 0x (NULL)   0x0


The text in blue as below:
>LOAD   0x00 0x 0x 
> 0x0469bc 0x0469bc R   0x1000
>LOAD   0x047000 0x00047000 0x00047000 
> 0x10ee20 0x10ee20   E 0x1000
>LOAD   0x156000 0x00156000 0x00156000 
> 0x00a598 0x221fa8 RW  0x1000
>DYNAMIC0x15ee20 0x0015ee20 0x0015ee20 
> 0x0001c0 0x0001c0 RW  0x8

-邮件原件-
发件人: John Reiser [mailto:jrei...@bitwagon.com] 
发送时间: 2019年4月8日 12:24
收件人: valgrind-users@lists.sourceforge.net
主题: Re: [Valgrind-users] [HELP] Android use LD to link the program but the 
valgrind can not report malloc leak; 

> Elf file type is DYN (Shared object file) Entry point 0x47000 There 
> are 9 program headers, starting at offset 64

> Program Headers:
>    Type   Offset   VirtAddr   PhysAddr   
> FileSiz  MemSiz   Flg Align
>    PHDR   0x40 0x0040 0x0040 
> 0x0001f8 0x0001f8 R   0x8
>    LOAD   0x00 0x 0x 
> 0x0469bc 0x0469bc R   0x1000
>    LOAD   0x047000 0x00047000 0x00047000 
> 0x10ee20 0x10ee20   E 0x1000
>    LOAD   0x156000 0x00156000