trans object of STL-class on interface which dynamicly load by dlopen

By -

main.cpp

#include "string"
#include "unordered_map"
#include "iostream"

#include "dlfcn.h"

typedef void x(std::unordered_map<std::string, std::string> &);

int main(int argc, char **argv)
{
    auto handle = dlopen("./test3.so", RTLD_NOW);

    if(!handle)
    {
        std::cout << dlerror() << std::endl;
        return -1;
    }

    x *x;
    *(void **)&x = dlsym(handle, "x");

    // std::unordered_map<std::string, std::string> result; //ok
    std::unordered_map<std::string, std::string> result;    //failed if not dynamic link test3.so

    x(result);
    std::cout << result["x"] << std::endl;

    dlclose(handle);
    return 0;
}

test3.cpp

#include "unordered_map"
#include "string"
#ifdef __cplusplus
extern "C"
{
#endif
    void x(std::unordered_map<std::string, std::string> &result)
    {
        result["x"] = "Hello, world";
    }
#ifdef __cplusplus
}
#endif

if main.cpp build with gcc-11 while test3.cpp with gcc-4.8, the program would crash.

g++ -g -fpic -shared test3.cpp -o test3.so  //g++ version is 4.8
g++ -g main.cpp -ldl    //g++ version is 11

[zrar@CentOS7 cpp]$ ./a.out 
*** Error in `./a.out': munmap_chunk(): invalid pointer: 0x00007ffd3747f020 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7340f)[0x7f2d328b340f]
/lib64/libc.so.6(+0x78c7e)[0x7f2d328b8c7e]
./test3.so(_ZN9__gnu_cxx13new_allocatorIPNSt8__detail15_Hash_node_baseEE10deallocateEPS3_m+0x20)[0x7f2d3263d506]
./test3.so(_ZNSt10_HashtableISsSt4pairIKSsSsESaIS2_ENSt8__detail10_Select1stESt8equal_toISsESt4hashISsENS4_18_Mod_range_hashingENS4_20_Default_ranged_hashENS4_20_Prime_rehash_policyENS4_17_Hashtable_traitsILb1ELb0ELb1EEEE21_M_deallocate_bucketsEPPNS4_15_Hash_node_baseEm+0x4a)[0x7f2d3263d342]
./test3.so(_ZNSt10_HashtableISsSt4pairIKSsSsESaIS2_ENSt8__detail10_Select1stESt8equal_toISsESt4hashISsENS4_18_Mod_range_hashingENS4_20_Default_ranged_hashENS4_20_Prime_rehash_policyENS4_17_Hashtable_traitsILb1ELb0ELb1EEEE13_M_rehash_auxEmSt17integral_constantIbLb1EE+0x188)[0x7f2d3263d08a]
./test3.so(_ZNSt10_HashtableISsSt4pairIKSsSsESaIS2_ENSt8__detail10_Select1stESt8equal_toISsESt4hashISsENS4_18_Mod_range_hashingENS4_20_Default_ranged_hashENS4_20_Prime_rehash_policyENS4_17_Hashtable_traitsILb1ELb0ELb1EEEE9_M_rehashEmRKm+0x2b)[0x7f2d3263cb4f]
./test3.so(_ZNSt10_HashtableISsSt4pairIKSsSsESaIS2_ENSt8__detail10_Select1stESt8equal_toISsESt4hashISsENS4_18_Mod_range_hashingENS4_20_Default_ranged_hashENS4_20_Prime_rehash_policyENS4_17_Hashtable_traitsILb1ELb0ELb1EEEE21_M_insert_unique_nodeEmmPNS4_10_Hash_nodeIS2_Lb1EEE+0x85)[0x7f2d3263c7eb]
./test3.so(_ZNSt8__detail9_Map_baseISsSt4pairIKSsSsESaIS3_ENS_10_Select1stESt8equal_toISsESt4hashISsENS_18_Mod_range_hashingENS_20_Default_ranged_hashENS_20_Prime_rehash_policyENS_17_Hashtable_traitsILb1ELb0ELb1EEELb1EEixEOSs+0xc2)[0x7f2d3263c3b6]
./test3.so(_ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEixEOSs+0x2e)[0x7f2d3263c2f2]
./test3.so(x+0x43)[0x7f2d3263c138]
./a.out[0x40279a]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f2d32861ac5]
./a.out[0x402661]
======= Memory map: ========
00400000-00402000 r--p 00000000 fd:00 100685803                          /home/zrar/Documents/cpp/a.out
00402000-0040a000 r-xp 00002000 fd:00 100685803                          /home/zrar/Documents/cpp/a.out
0040a000-0040f000 r--p 0000a000 fd:00 100685803                          /home/zrar/Documents/cpp/a.out
0040f000-00410000 r--p 0000e000 fd:00 100685803                          /home/zrar/Documents/cpp/a.out
00410000-00411000 rw-p 0000f000 fd:00 100685803                          /home/zrar/Documents/cpp/a.out
00aa2000-00ac3000 rw-p 00000000 00:00 0                                  [heap]
7f2d32636000-7f2d3263f000 r-xp 00000000 fd:00 100685761                  /home/zrar/Documents/cpp/test3.so
7f2d3263f000-7f2d3283e000 ---p 00009000 fd:00 100685761                  /home/zrar/Documents/cpp/test3.so
7f2d3283e000-7f2d3283f000 r--p 00008000 fd:00 100685761                  /home/zrar/Documents/cpp/test3.so
7f2d3283f000-7f2d32840000 rw-p 00009000 fd:00 100685761                  /home/zrar/Documents/cpp/test3.so
7f2d32840000-7f2d329e2000 r-xp 00000000 fd:00 452646                     /usr/lib64/libc-2.18.so
7f2d329e2000-7f2d32be2000 ---p 001a2000 fd:00 452646                     /usr/lib64/libc-2.18.so
7f2d32be2000-7f2d32be6000 r--p 001a2000 fd:00 452646                     /usr/lib64/libc-2.18.so
7f2d32be6000-7f2d32be8000 rw-p 001a6000 fd:00 452646                     /usr/lib64/libc-2.18.so
7f2d32be8000-7f2d32bec000 rw-p 00000000 00:00 0 
7f2d32bec000-7f2d32c01000 r-xp 00000000 fd:00 1527643                    /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f2d32c01000-7f2d32e00000 ---p 00015000 fd:00 1527643                    /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f2d32e00000-7f2d32e01000 r--p 00014000 fd:00 1527643                    /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f2d32e01000-7f2d32e02000 rw-p 00015000 fd:00 1527643                    /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f2d32e02000-7f2d32f03000 r-xp 00000000 fd:00 1459                       /usr/lib64/libm-2.18.so
7f2d32f03000-7f2d33102000 ---p 00101000 fd:00 1459                       /usr/lib64/libm-2.18.so
7f2d33102000-7f2d33103000 r--p 00100000 fd:00 1459                       /usr/lib64/libm-2.18.so
7f2d33103000-7f2d33104000 rw-p 00101000 fd:00 1459                       /usr/lib64/libm-2.18.so
7f2d33104000-7f2d331ed000 r-xp 00000000 fd:00 18326                      /usr/lib64/libstdc++.so.6.0.19
7f2d331ed000-7f2d333ed000 ---p 000e9000 fd:00 18326                      /usr/lib64/libstdc++.so.6.0.19
7f2d333ed000-7f2d333f5000 r--p 000e9000 fd:00 18326                      /usr/lib64/libstdc++.so.6.0.19
7f2d333f5000-7f2d333f7000 rw-p 000f1000 fd:00 18326                      /usr/lib64/libstdc++.so.6.0.19
7f2d333f7000-7f2d3340c000 rw-p 00000000 00:00 0 
7f2d3340c000-7f2d3340e000 r-xp 00000000 fd:00 452582                     /usr/lib64/libdl-2.18.so
7f2d3340e000-7f2d3360e000 ---p 00002000 fd:00 452582                     /usr/lib64/libdl-2.18.so
7f2d3360e000-7f2d3360f000 r--p 00002000 fd:00 452582                     /usr/lib64/libdl-2.18.so
7f2d3360f000-7f2d33610000 rw-p 00003000 fd:00 452582                     /usr/lib64/libdl-2.18.so
7f2d33610000-7f2d33630000 r-xp 00000000 fd:00 230826                     /usr/lib64/ld-2.18.so
7f2d33812000-7f2d33818000 rw-p 00000000 00:00 0 
7f2d3382e000-7f2d33830000 rw-p 00000000 00:00 0 
7f2d33830000-7f2d33831000 r--p 00020000 fd:00 230826                     /usr/lib64/ld-2.18.so
7f2d33831000-7f2d33832000 rw-p 00021000 fd:00 230826                     /usr/lib64/ld-2.18.so
7f2d33832000-7f2d33833000 rw-p 00000000 00:00 0 
7ffd37461000-7ffd37482000 rw-p 00000000 00:00 0                          [stack]
7ffd375d0000-7ffd375d2000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
Aborted
[zrar@CentOS7 cpp]$ ldd a.out 
        linux-vdso.so.1 (0x00007ffc793ca000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007ff2ebd37000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007ff2eba2f000)
        libm.so.6 => /lib64/libm.so.6 (0x00007ff2eb72d000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007ff2eb517000)
        libc.so.6 => /lib64/libc.so.6 (0x00007ff2eb16b000)
        /lib64/ld-linux-x86-64.so.2 (0x00007ff2ebf3b000)
[zrar@CentOS7 cpp]$ ldd test3.so
        linux-vdso.so.1 (0x00007ffeff7c6000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fb3c0764000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fb3c0462000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fb3c024c000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fb3bfea0000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fb3c0c76000)

if main.cpp build with test3.so in linking list, the program would run normaly.

g++ -g -fpic -shared test3.cpp -o test3.so  //g++ version is 4.8
g++ -g main.cpp -Wl,-rpath,'$ORIGIN' -ldl test3.so    //g++ version is 11

[zrar@CentOS7 cpp]$ ./a.out 
Hello, world
[zrar@CentOS7 cpp]$ ldd ./a.out 
        linux-vdso.so.1 (0x00007ffea6bb9000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fd670b7f000)
        test3.so => /home/zrar/Documents/cpp/test3.so (0x00007fd670975000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fd67066d000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fd67036b000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fd670155000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fd66fda9000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fd670d83000)
[zrar@CentOS7 cpp]$ ldd test3.so
        linux-vdso.so.1 (0x00007ffc91596000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fc484378000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fc484076000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fc483e60000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fc483ab4000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fc48488a000)

In my requirment, I want to dynamicly load a plugin(may be built with other-release gcc) and trans STL object directly(host and plugin are both written in cpp, and wrapping of class in c-style is a complexity work) in plugin interface.



Comments

Post a Comment

Popular posts from this blog

Today Walkin 14th-Sept

By -
Image
14th Sept 2017 ( GO Through all List) Read Walkin details properly , Try to call company before attending if possible !!! ==================================== 1. Myntra through fresherworld (Call Based , Venue shared to shortlisted candidates) _____________________________ 2. Magna : Hiring for Client Harman : C++
Read more

Spring Elasticsearch Operations

By -
Elasticsearch Operations Spring Data Elasticsearch uses two interfaces to define the operations that can be called against an Elasticsearch index. These are ElasticsearchOperations and ReactiveElasticsearchOperations. Whereas the first is used with the classic synchronous implementations, the second one uses reactive infrastructure. The default implementations of the interfaces offer: Read/Write mapping support for domain types. A rich query and criteria api. Resource management and Exception translation. ElasticsearchTemplate The ElasticsearchTemplate is an implementation of the ElasticsearchOperations interface using the Transport Client. @Configuration public class TransportClientConfig extends ElasticsearchConfigurationSupport {   @Bean   public Client elasticsearchClient() throws UnknownHostException {                      Settings settings = Settings.builder().put("cluster.name", "elasticsearch")....
Read more

Hibernate Search - Elasticsearch with JSON manipulation

By -
Elasticsearch with JSON manipulation Elasticsearch ships with many features. It is possible that at some point, one feature you need will not be exposed by the Search DSL. To work around such limitations, Hibernate Search provides ways to: Transform the HTTP request sent to Elasticsearch for search queries. Read the raw JSON of the HTTP response received from Elasticsearch for search queries. Direct changes to the HTTP request may conflict with Hibernate Search features and be supported differently by different versions of Elasticsearch. Similarly, the content of the HTTP response may change depending on the version of Elasticsearch, depending on which Hibernate Search features are used, and even depending on how Hibernate Search features are implemented. Thus, features relying on direct access to HTTP requests or responses cannot be guaranteed to continue to work when upgrading Hibernate Search, even for micro upgrades (x.y.z to x.y.(z+1)). Use this at your own risk....
Read more