如何编译源$ C ​​$ C库NDK工具? [英] How to compile library with source code with NDK tools?

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问题描述

如何使用源$ C ​​$ C编译库?

我开发了Android NDK本地库。 有时候,我从logcat中得到了崩溃转储信息。

  06-18 15:24:58.545:信息/ DEBUG(24667):*** *** *** *** *** *** *** * ** *** *** *** *** *** *** *** ***
06-18 15:24:58.545:信息/ DEBUG(24667):建立指纹:NVIDIA /和声/和声/和声:2.2 / FRF91 / 20110304.134348:ENG /测试键
06-18 15:24:58.545:信息/ DEBUG(24667):PID:25870,TID:26261>>> com.andtv<<<
06-18 15:24:58.545:信息/ DEBUG(24667):11(SIGSEGV),故障地址4a7b041c
06-18 15:24:58.545:信息/ DEBUG(24667):R0 4a7b041c R1 4a75220c R2 00000200 R3 0000006d
06-18 15:24:58.545:信息/ DEBUG(24667):R4 4a7b041d R5 00000000 R6 82434ad0 R7 4a752768
06-18 15:24:58.545:信息/ DEBUG(24667):R8 4a75220c R9 000004b4 10 4a752777 FP 00000000
06-18 15:24:58.545:信息/ DEBUG(24667):IP 00000000 SP 4a7521f8 LR 8202e11f PC afd1d9cc CPSR 00000030
06-18 15:24:58.545:信息/ DEBUG(24667):D0 3fcc745e0ab0ad85 D1 3fd24aaf828e1369
06-18 15:24:58.545:信息/ DEBUG(24667)D2 3fa56e5ff7cd8dc6 D3 3fe5568b9401f367
06-18 15:24:58.545:信息/ DEBUG(24667):D4 bfc34e892d87a4ea D5 bfd1c2b0f8ac7dc9
06-18 15:24:58.545:信息/ DEBUG(24667):D6 D7 3fe62e42fee00000 3ff0000000000000
06-18 15:24:58.545:信息/ DEBUG(24667):D8 4190000044038000 D9 42600000亿
06-18 15:24:58.545:信息/ DEBUG(24667):D10 423999a0423999a0 D11 0000000000000000
06-18 15:24:58.545:信息/ DEBUG(24667):D12 D13 0000000000000000 0000000000000000
06-18 15:24:58.545:信息/ DEBUG(24667):D14 D15 0000000000000000 0000000000000000
06-18 15:24:58.545:信息/ DEBUG(24667):SCR 80000012
06-18 15:24:58.565:ERROR / OMXPlayer(942):等待prepare 0x2b8fb0
06-18 15:24:58.925:信息/ DEBUG(24667):#00件0001d9cc /system/lib/libc.so
06-18 15:24:58.925:信息/ DEBUG(24667):#01件0002e11c /data/data/com.andtv/lib/libffmpeg.so
 

这是一个问题,如何找到真正的源头code地址2e11c? 我搜索从谷歌的一些解决方案,有人说:

  ARM-EABI-objdump的-S​​ my_library.so
 

但没有源$ C ​​$ c在输出文本中,只有集会code那里。 我用的是样品的 HELLO-JNI 在ndk5r项目:

 数量:JNI qrtt1 $臂EABI-objdump的-S​​ ../libs/armeabi/libhello-jni.so

../libs/armeabi/libhello-jni.so:文件格式ELF32,littlearm


拆卸的段.text:

000002dc&其中; Java_com_example_hellojni_HelloJni_stringFromJNI计算值:
 2DC:B500推{LR}
 二维超声心动图:B083分的SP,#12
 2E0:9001 STR R0,[SP,#4]
 2E2:9100海峡R1,[SP,#0]
 2E4:9b01 LDR R3,[SP,#4]
 2E6:681A LDR R2,[R3,#0]
 2E8:23a7 MOVS R3,#167
 2EA:009B LSLS R3,R3,#2
 2EC:58d2 LDR R2,[R2,R3]
 2EE:9901 LDR R1,[SP,#4]
 2f0:4b04 LDR R3,[PC,#16](304< Java_com_example_hellojni_HelloJni_stringFromJNI + 0x28>)
 2F2:447B增加R3,PC
 2F4:1c08添加R0,R1,#0
 2F6:1c19添加R1,R3,#0
 2F8:4790 BLX R2
 2FA:1c03增加r3中时,r0,#0
 2FC:1c18添加r0的,因为r 3,#0
 2FE:B003加入SP,#12
 300:bd00 POP {PC}
 302:46c0 NOP(MOV R8,R8)
 304:0012 LSLS R2,R2,#0
 

时它可以显示源-S选项?


[更新解决方案,2010年6月19日]

我发现NDK-gdb的教程:一个调试的JNI的例子为Android 。它说,NDK-build脚本会杀了我的调试符号。我试图弄清楚它是由乳宁NDK建造V = 1:

 数量:JNI qrtt1 $ NDK建造V = 1
\ RM -f /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/lib*.so /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi-V7A / lib中*。所以/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/x86/lib*.so
RM -f /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi / gdbserver的/用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi- V7A / gdbserver的/用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ 86 / gdbserver的
RM -f /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi-V7A / gdb.setup /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/x86/gdb.setup
GDBSERVER:[臂的Linux androideabi-4.4.3]库/ armeabi / gdbserver的
MKDIR -p /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi
安装-p /Users/qrtt1/app/android-ndk-r5b/tool​​chains/arm-linux-androideabi-4.4.3/$p$pbuilt/gdbserver /用户/ qrtt1 / APP / Android的NDK-R5B /样品/个招呼-jni /库/ armeabi / gdbserver的
Gdbsetup:库/ armeabi / gdb.setup
回声设置solib搜索路径/用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI / OBJ /本地/ armeabi> /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup
回声目录/用户/ qrtt1 / APP / Android的NDK-R5B /平台/ Android为8 /弓臂/ usr / include目录/用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI / JNI /用户/ qrtt1 / APP / Android的NDK-R5B /来源/ CXX-STL /系统>> /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup
安装:libhello-jni.so =>库/ armeabi / libhello-jni.so
MKDIR -p /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI /库/ armeabi
安装-p /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ hello- JNI /库/ armeabi / libhello-jni.so
/Users/qrtt1/app/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/$p$pbuilt/darwin-x86/bin/arm-linux-androideabi-strip --strip-不需要/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/libhello-jni.so
 

该命令会剥夺我的调试符号:

<$p$p><$c$c>/Users/qrtt1/app/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/$p$pbuilt/darwin-x86/bin/arm-linux-androideabi-strip --strip-不需要/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/libhello-jni.so

我不知道要禁用条命令,因为我的NDK版本不同。不过,我可以用的。所以之前删除路径:

  /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so
 

该人士$ ​​C $ c是回:

 数量:JNI qrtt1 $臂EABI-objdump的-S​​ /用户/ qrtt1 / APP / Android的NDK-R5B /样本/ HELLO-JNI / OBJ /本地/ armeabi / libhello -jni.so

/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so:文件格式ELF32,littlearm


拆卸的段.text:

000002dc&其中; Java_com_example_hellojni_HelloJni_stringFromJNI计算值:
 *应用程序/采样/ HELLO-JNI /项目/ src目录/ COM /例子/ HelloJni / HelloJni.java
 * /
的jstring
Java_com_example_hellojni_HelloJni_stringFromJNI(JNIEnv的* ENV,
                                                  jobject THIZ)
{
 2DC:B500推{LR}
 二维超声心动图:B083分的SP,#12
 2E0:9001 STR R0,[SP,#4]
 2E2:9100海峡R1,[SP,#0]
    返回(* ENV) - &GT; NewStringUTF(ENV,你好来自JNI!);
 2E4:9b01 LDR R3,[SP,#4]
 2E6:681A LDR R2,[R3,#0]
 2E8:23a7 MOVS R3,#167
 2EA:009B LSLS R3,R3,#2
 2EC:58d2 LDR R2,[R2,R3]
 2EE:9901 LDR R1,[SP,#4]
 2f0:4b04 LDR R3,[PC,#16](304&LT; Java_com_example_hellojni_HelloJni_stringFromJNI + 0x28&GT;)
 2F2:447B增加R3,PC
 2F4:1c08添加R0,R1,#0
 2F6:1c19添加R1,R3,#0
 2F8:4790 BLX R2
 2FA:1c03增加r3中时,r0,#0
}
 2FC:1c18添加r0的,因为r 3,#0
 2FE:B003加入SP,#12
 300:bd00 POP {PC}
 302:46c0 NOP(MOV R8,R8)
 304:00000012 .word 0x00000012
 

解决方案

  NDK-建立NDK_DEBUG = 1
 

将保持符号调试。

How to compile library with source code ?

I am developing the native library with android ndk. Sometimes I got the crash dump messages from logcat.

06-18 15:24:58.545: INFO/DEBUG(24667): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-18 15:24:58.545: INFO/DEBUG(24667): Build fingerprint: 'nvidia/harmony/harmony/harmony:2.2/FRF91/20110304.134348:eng/test-keys'
06-18 15:24:58.545: INFO/DEBUG(24667): pid: 25870, tid: 26261  >>> com.andtv <<<
06-18 15:24:58.545: INFO/DEBUG(24667): signal 11 (SIGSEGV), fault addr 4a7b041c
06-18 15:24:58.545: INFO/DEBUG(24667):  r0 4a7b041c  r1 4a75220c  r2 00000200  r3 0000006d
06-18 15:24:58.545: INFO/DEBUG(24667):  r4 4a7b041d  r5 00000000  r6 82434ad0  r7 4a752768
06-18 15:24:58.545: INFO/DEBUG(24667):  r8 4a75220c  r9 000004b4  10 4a752777  fp 00000000
06-18 15:24:58.545: INFO/DEBUG(24667):  ip 00000000  sp 4a7521f8  lr 8202e11f  pc afd1d9cc  cpsr 00000030
06-18 15:24:58.545: INFO/DEBUG(24667):  d0  3fcc745e0ab0ad85  d1  3fd24aaf828e1369
06-18 15:24:58.545: INFO/DEBUG(24667):  d2  3fa56e5ff7cd8dc6  d3  3fe5568b9401f367
06-18 15:24:58.545: INFO/DEBUG(24667):  d4  bfc34e892d87a4ea  d5  bfd1c2b0f8ac7dc9
06-18 15:24:58.545: INFO/DEBUG(24667):  d6  3fe62e42fee00000  d7  3ff0000000000000
06-18 15:24:58.545: INFO/DEBUG(24667):  d8  4190000044038000  d9  4260000000000000
06-18 15:24:58.545: INFO/DEBUG(24667):  d10 423999a0423999a0  d11 0000000000000000
06-18 15:24:58.545: INFO/DEBUG(24667):  d12 0000000000000000  d13 0000000000000000
06-18 15:24:58.545: INFO/DEBUG(24667):  d14 0000000000000000  d15 0000000000000000
06-18 15:24:58.545: INFO/DEBUG(24667):  scr 80000012
06-18 15:24:58.565: ERROR/OMXPlayer(942): waiting to prepare 0x2b8fb0
06-18 15:24:58.925: INFO/DEBUG(24667):          #00  pc 0001d9cc  /system/lib/libc.so
06-18 15:24:58.925: INFO/DEBUG(24667):          #01  pc 0002e11c  /data/data/com.andtv/lib/libffmpeg.so

It is a problem how to find the real source code at address 2e11c? I search some solutions from google, someone said:

arm-eabi-objdump -S my_library.so

But no source code in the output text, only assembly code there. I use the sample hello-jni project in the ndk5r:

qty:jni qrtt1$ arm-eabi-objdump -S ../libs/armeabi/libhello-jni.so 

../libs/armeabi/libhello-jni.so:     file format elf32-littlearm


Disassembly of section .text:

000002dc <Java_com_example_hellojni_HelloJni_stringFromJNI>:
 2dc:   b500            push    {lr}
 2de:   b083            sub     sp, #12
 2e0:   9001            str     r0, [sp, #4]
 2e2:   9100            str     r1, [sp, #0]
 2e4:   9b01            ldr     r3, [sp, #4]
 2e6:   681a            ldr     r2, [r3, #0]
 2e8:   23a7            movs    r3, #167
 2ea:   009b            lsls    r3, r3, #2
 2ec:   58d2            ldr     r2, [r2, r3]
 2ee:   9901            ldr     r1, [sp, #4]
 2f0:   4b04            ldr     r3, [pc, #16]   (304 <Java_com_example_hellojni_HelloJni_stringFromJNI+0x28>)
 2f2:   447b            add     r3, pc
 2f4:   1c08            adds    r0, r1, #0
 2f6:   1c19            adds    r1, r3, #0
 2f8:   4790            blx     r2
 2fa:   1c03            adds    r3, r0, #0
 2fc:   1c18            adds    r0, r3, #0
 2fe:   b003            add     sp, #12
 300:   bd00            pop     {pc}
 302:   46c0            nop                     (mov r8, r8)
 304:   0012            lsls    r2, r2, #0

Is it possible to show source with -S option ?


[UPDATE solution 2010/06/19]

I found the ndk-gdb tutorial: A debuggable JNI example for Android. it said, ndk-build script will kill my debug symbol. I try to figure out it by runing ndk-build V=1:

qty:jni qrtt1$ ndk-build V=1
\rm -f /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/lib*.so /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi-v7a/lib*.so /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/x86/lib*.so
rm -f /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdbserver /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi-v7a/gdbserver /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/x86/gdbserver
rm -f /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi-v7a/gdb.setup /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/x86/gdb.setup
Gdbserver      : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
mkdir -p /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi
install -p /Users/qrtt1/app/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/gdbserver /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdbserver
Gdbsetup       : libs/armeabi/gdb.setup
echo "set solib-search-path /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi" > /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup
echo "directory /Users/qrtt1/app/android-ndk-r5b/platforms/android-8/arch-arm/usr/include /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/jni /Users/qrtt1/app/android-ndk-r5b/sources/cxx-stl/system" >> /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/gdb.setup
Install        : libhello-jni.so => libs/armeabi/libhello-jni.so
mkdir -p /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi
install -p /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/libhello-jni.so
/Users/qrtt1/app/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-strip --strip-unneeded  /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/libhello-jni.so

The command will strip my debug symbol:

/Users/qrtt1/app/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86/bin/arm-linux-androideabi-strip --strip-unneeded  /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/libs/armeabi/libhello-jni.so

I have no idea to disable the strip command, because my ndk version is different. However, I can use the .so before stripped in the path:

/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so

The source code is back:

qty:jni qrtt1$ arm-eabi-objdump -S /Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so

/Users/qrtt1/app/android-ndk-r5b/samples/hello-jni/obj/local/armeabi/libhello-jni.so:     file format elf32-littlearm


Disassembly of section .text:

000002dc <Java_com_example_hellojni_HelloJni_stringFromJNI>:
 *   apps/samples/hello-jni/project/src/com/example/HelloJni/HelloJni.java
 */
jstring
Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,
                                                  jobject thiz )
{
 2dc:   b500            push    {lr}
 2de:   b083            sub     sp, #12
 2e0:   9001            str     r0, [sp, #4]
 2e2:   9100            str     r1, [sp, #0]
    return (*env)->NewStringUTF(env, "Hello from JNI !");
 2e4:   9b01            ldr     r3, [sp, #4]
 2e6:   681a            ldr     r2, [r3, #0]
 2e8:   23a7            movs    r3, #167
 2ea:   009b            lsls    r3, r3, #2
 2ec:   58d2            ldr     r2, [r2, r3]
 2ee:   9901            ldr     r1, [sp, #4]
 2f0:   4b04            ldr     r3, [pc, #16]   (304 <Java_com_example_hellojni_HelloJni_stringFromJNI+0x28>)
 2f2:   447b            add     r3, pc
 2f4:   1c08            adds    r0, r1, #0
 2f6:   1c19            adds    r1, r3, #0
 2f8:   4790            blx     r2
 2fa:   1c03            adds    r3, r0, #0
}
 2fc:   1c18            adds    r0, r3, #0
 2fe:   b003            add     sp, #12
 300:   bd00            pop     {pc}
 302:   46c0            nop                     (mov r8, r8)
 304:   00000012        .word   0x00000012

解决方案

ndk-build NDK_DEBUG=1

will keep the symbol for debug.

这篇关于如何编译源$ C ​​$ C库NDK工具?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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