#include "stdio.h"#include "stdlib.h"#include "dlfcn.h"int main(void){int (*So)(const char* pszTimestamp, const char* pszSDRType, const char* pszCallID,const char* pszUserNo, const char* pszCallerNo, const char* pszCalledNo,const char* pszOldNumber, const char* pszLocationID, const char* pszField1,const char* pszField2, const char* pszField3, const char* pszField4);const char *errmsg = "";printf("begin!\n");void *SoLib = dlopen("/root/RecordDll//Release/libRecordDll.so", RTLD_LAZY);printf("111");if (NULL == SoLib){printf("222");fprintf(stderr, "Failed to load libRecordDll.so:%s\n", dlerror());return 1;}dlerror();printf("333");*(void **)(&So) = dlsym(SoLib, "GetInfo");printf("444");if (NULL != (errmsg = dlerror())){printf("%s\n", errmsg);return 1;}printf("555");int ret = So("2011-11-11 11:11:11", "8", "11","111", "1111", "11111","111111", "1111111", "1~1~1","2011-11-11 11:11:11~2012-11-11 11:11:11~0~03", "", "");printf("%d", ret);dlclose(SoLib);return 0;}
2 回答
Smart貓小萌
TA貢獻1911條經驗 獲得超7個贊
你這段代碼應該沒問題，我那libstdc++試過了，沒錯。
問題應該在你的/root/RecordDll//Release/libRecordDll.so，
這個動態(tài)庫GetInfo函數有bug。指針錯誤或者數據越界。
我這代碼：
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
int main(void)
{
// /usr/lib/libstdc++.so.6
int (*mygetchar)(void);
const char *errmsg = "";
printf("begin!\n");
void *SoLib = dlopen("/usr/lib/libstdc++.so.6", RTLD_LAZY);
printf("111\n");
if (NULL == SoLib)
{
printf("222\n");
fprintf(stderr, "Failed to load libstdc++.so.6:%s\n", dlerror());
return 1;
}
dlerror();
printf("333\n");
*(void **)(&mygetchar) = dlsym(SoLib, "getchar");//
printf("444\n");
if (NULL != (errmsg = dlerror()))
{
printf("%s\n", errmsg);
return 1;
}
printf("555\n");
int ret = mygetchar();
printf("%d\n", ret);
dlclose(SoLib);
return 0;
}
上面代碼跑沒問題的，你的要錯就是在動態(tài)庫本身了。
“還有就是:dlopen()報的錯 ,但是明確的是可以找到SO文件,”
/root/RecordDll//Release/libRecordDll.so
看到了，/RecordDll//Release這中間多了一根右斜桿，路徑錯誤，找到就見鬼了。
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