在嵌入式uClibc上移植valgrind

安装环境：

Linux ubuntu-hz 4.2.0-27-generic#32~14.04.1-Ubuntu SMP Fri Jan 22 15:32:26 UTC 2016 x86_64 x86_64 x86_64GNU/Linux

交叉编译器：arm-hisiv300-linux

移植原因：

valgrind监控的执行文件要求：动态编译，动态库没有strip过。但是厂家提供的arm-hisiv300-linux的动态库都是strip掉的，所以用valgrind跑出来的结果是不正确的，没有检查出泄露、越界等情况。因此下载一个和厂家版本一样的uClibc进行配置、编译，替换掉现有的动态库，然后在动态编译可执行文件，就可以用valgrind监控。

步骤如下：

1、安装现有厂家的交叉编译器

拷贝 arm-hisiv300-linux.tar.bz2和cross.v300.install到服务器

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cross.v300.install修改为安装目录：

TOP_DIR=/home/he_liangbin/bin

./cross.v300.install 安装交叉编译器

最后跳出选择，直接abort即可

2、编译uClibc

从https://www.uclibc.org/下载交叉编译器一样的版本：0.9.33.2

解压：

tar xf uClibc-0.9.33.2.tar.xz 解压版本

进入根目录，make menuconfig，进行配置：

diff uClibc-0.9.33.2/.config uClibc-0.9.33.2_mm/.config

4c4
< # Tue Oct 31 10:28:06 2017
---
> # Fri Oct 27 20:21:16 2017
7c7
< # TARGET_arm is not set
---
> TARGET_arm=y
30c30
< TARGET_x86_64=y
---
> # TARGET_x86_64 is not set
36c36
< TARGET_ARCH="x86_64"
---
> TARGET_ARCH="arm"
37a38,40
> CONFIG_ARM_EABI=y
> # COMPILE_IN_THUMB_MODE is not set
> # USE_BX is not set
42a46
> ARCH_ANY_ENDIAN=y
44,47c48,49
<
< #
< # Using Little Endian
< #
---
> # ARCH_WANTS_BIG_ENDIAN is not set
> ARCH_WANTS_LITTLE_ENDIAN=y
52c54
< # DO_C99_MATH is not set
---
> DO_C99_MATH=y
55c57
< KERNEL_HEADERS="/usr/include"
---
> KERNEL_HEADERS="/home/he_liangbin/bin/arm-hisiv300-linux/target/usr/include"（1）
78c80
< HAS_NO_THREADS=y
---
> # HAS_NO_THREADS is not set
81c83,86
< # UCLIBC_HAS_THREADS_NATIVE is not set
---
> UCLIBC_HAS_THREADS_NATIVE=y
> UCLIBC_HAS_THREADS=y
> UCLIBC_HAS_TLS=y
> # PTHREADS_DEBUG_SUPPORT is not set
90c95
< # UCLIBC_SUSV3_LEGACY is not set
---
> UCLIBC_SUSV3_LEGACY=y
92c97
< # UCLIBC_SUSV4_LEGACY is not set
---
> UCLIBC_SUSV4_LEGACY=y
140,142c145,150
< # UCLIBC_HAS_IPV6 is not set
< # UCLIBC_HAS_RPC is not set
< # UCLIBC_USE_NETLINK is not set
---
> UCLIBC_HAS_IPV6=y
> UCLIBC_HAS_RPC=y
> UCLIBC_HAS_FULL_RPC=y
> UCLIBC_HAS_REENTRANT_RPC=y
> UCLIBC_USE_NETLINK=y
> UCLIBC_SUPPORT_AI_ADDRCONFIG=y
146,148c154,156
< # UCLIBC_HAS_RESOLVER_SUPPORT is not set
< # UCLIBC_HAS_LIBRESOLV_STUB is not set
< # UCLIBC_HAS_LIBNSL_STUB is not set
---
> UCLIBC_HAS_RESOLVER_SUPPORT=y
> UCLIBC_HAS_LIBRESOLV_STUB=y
> UCLIBC_HAS_LIBNSL_STUB=y
160c168
< # UCLIBC_HAS_WCHAR is not set
---
> UCLIBC_HAS_WCHAR=y
164d171
< # USE_OLD_VFPRINTF is not set
190a198
> UCLIBC_HAS_STDIO_FUTEXES=y
201a210
> # UCLIBC_HAS_FTW is not set
210,211c219,220
< RUNTIME_PREFIX="/usr/$(TARGET_ARCH)-linux-uclibc/"
< DEVEL_PREFIX="/usr/$(TARGET_ARCH)-linux-uclibc/usr/"
---
> RUNTIME_PREFIX="/home/he_liangbin/cross_compile/tool-chain"（2）
> DEVEL_PREFIX="/home/he_liangbin/cross_compile/tool-chain/usr"
217a227
> # UCLIBC_BUILD_PIE is not set
219c229,234
< # UCLIBC_HAS_SSP is not set
---
> UCLIBC_HAS_SSP=y
> # UCLIBC_HAS_SSP_COMPAT is not set
> # SSP_QUICK_CANARY is not set
> PROPOLICE_BLOCK_ABRT=y
> # PROPOLICE_BLOCK_SEGV is not set
> # UCLIBC_BUILD_SSP is not set
227c242
< CROSS_COMPILER_PREFIX=""
---
> CROSS_COMPILER_PREFIX="arm-hisiv300-linux-"（3）
230c245
< DOSTRIP=y
---
> # DOSTRIP is not set（4）

红色（1）内核头文件安装路径

红色（2）uClibc安装路径

红色（3）交叉编译

红色（4）库不要strip掉

make

make install

cp ~/cross_compile/tool-chain/lib/*~/bin/arm-hisiv300-linux/target/lib/

cp ~/cross_compile/tool-chain/usr/*~/bin/arm-hisiv300-linux/target/usr/ -rf

以上是替换原来的uClibc库

makePREFIX=/home/he_liangbin/bin/arm-hisiv300-linux/target install

PREFIX为交叉编译器安装路径，必须要否则动态编译不过，见问题2

3、编译valgrind

tar xf valgrind-3.13.0.tar.bz2

修改configure 5629代码：armv7*) -> armv7* | arm)

make distclean

./configure --host=arm-hisiv300-linuxCC=arm-hisiv300-linux-gcc CPP=arm-hisiv300-linux-cpp CXX=arm-hisiv300-linux-g++ --prefix=/home/he_liangbin/valgrind

make

make install

注意红色部分：挂载到设备上运行valgrind时也必须要在这个路径。

4、测试

源码：

1#include <stdlib.h>

2#include <malloc.h>

3#include <string.h>

5void test()

6 {

7 int *ptr =malloc(sizeof(int)*10);

9 ptr = malloc(10);

11 ptr[11] = 7; // 内存越界

12 memcpy(ptr +1, ptr, 11); // 踩内存

15 free(ptr);

16 free(ptr);// 重复释放

18 int *p1;

19 *p1 = 1; // 非法指针

20 printf("%d\n", ptr[8]);

21 }

23int main(void)

24 {

25 test();

26 return 0;

27 }

测试结果：

/home/he_liangbin/valgrind/bin # ./valgrind/home/memcheck_test

==954== Memcheck, a memory error detector

==954== Using Valgrind-3.13.0 and LibVEX;rerun with -h for copyright info

==954== Command: /home/memcheck_test

==954==

==954== Invalid read of size 4

==954== at 0x400580C: _dl_get_ready_to_run (in /lib/ld-uClibc.so.0)

==954== Address 0xbdf99a24 is on thread 1's stack

==954== 20 bytes below stack pointer

==954==

==954== Invalid read of size 4

==954== at 0x487641C: __uClibc_main (in /lib/libc.so.0)

==954== Address 0xbdf99bec is on thread 1's stack

==954== 20 bytes below stack pointer

==954==

==954== Invalid write of size 4

==954== at 0x858C: test (memcheck_test.c:11)