我似乎有一个损坏的堆,我不明白为什么会这样....
以下是来自 valgrind 的跟踪..
==12697== Use of uninitialised value of size 4
==12697== at 0xDD0725: __gnu_cxx::__atomic_add(int volatile*, int) (in /usr/lib/libstdc++.so.6.0.7)
==12697== by 0x1C3AD9BB: chargeRate::chargeRate(chargeRate const&) (in /root//app/libapp++.so)
==12697== by 0x1C4C9C22: __gnu_cxx::__mt_alloc_base<chargeRate>::construct(chargeRate*, chargeRate const&) (mt_allocator.h:585)
==12697== by 0x1C4CAC9F: std::vector<chargeRate, std::allocator<chargeRate> >::_M_insert_aux(__gnu_cxx::__normal_iterator<chargeRate*, std::vector<chargeRate, std::allocator<chargeRate> > >, chargeRate const&) (vector.tcc:284)
==12697== by 0x1C4CAF9E: std::vector<chargeRate, std::allocator<chargeRate> >::push_back(chargeRate const&) (stl_vector.h:610)
==12697== by 0x1C4C8A03: WebTranslations::getChargeDetails(std::vector<std::string, std::allocator<std::string> >&, std::vector<chargeRate, std::allocator<chargeRate> >&) (WebTranslations.cpp:427)
==12697== by 0x1C4C8F83: WebTranslations::getChargeTranslations(std::vector<std::string, std::allocator<std::string> >&, std::vector<std::string, std::allocator<std::string> >&) (WebTranslations.cpp:1172)
==12697==
==12697== Invalid read of size 4
==12697== at 0xDB468B: std::string::string(std::string const&) (in /usr/lib/libstdc++.so.6.0.7)
==12697== by 0x1C3AD9E0: chargeRate::chargeRate(chargeRate const&) (in /root//app/libapp++.so)
==12697== by 0x1C4C9C22: __gnu_cxx::__mt_alloc_base<chargeRate>::construct(chargeRate*, chargeRate const&) (mt_allocator.h:585)
==12697== by 0x1C4CAC9F: std::vector<chargeRate, std::allocator<chargeRate> >::_M_insert_aux(__gnu_cxx::__normal_iterator<chargeRate*, std::vector<chargeRate, std::allocator<chargeRate> > >, chargeRate const&) (vector.tcc:284)
==12697== by 0x1C4CAF9E: std::vector<chargeRate, std::allocator<chargeRate> >::push_back(chargeRate const&) (stl_vector.h:610)
==12697== by 0x1C4C8A03: WebTranslations::getChargeDetails(std::vector<std::string, std::allocator<std::string> >&, std::vector<chargeRate, std::allocator<chargeRate> >&) (WebTranslations.cpp:427)
==12697== by 0x1C4C8F83: WebTranslations::getChargeTranslations(std::vector<std::string, std::allocator<std::string> >&, std::vector<std::string, std::allocator<std::string> >&) (WebTranslations.cpp:1172)
==12697== by 0x1C299E48: zif__get_charge_translations (in /usr/lib/php4/.so)
==12697== by 0x1BCE0916: zend_do_fcall_common_helper (in /usr/lib/httpd/modules/libphp5.so)
==12697== by 0x1BCF1088: zend_do_fcall_handler (in /usr/lib/httpd/modules/libphp5.so)
==12697== by 0x1BCDDD92: execute (in /usr/lib/httpd/modules/libphp5.so)
==12697== by 0x1BCE02A9: zend_do_fcall_common_helper (in /usr/lib/httpd/modules/libphp5.so)
==12697== Address 0xFFFFFFFC is not stack'd, malloc'd or (recently) free'd
==12697==
==12697== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==12697== GPF (Pointer out of bounds?)
==12697== at 0xDB468B: std::string::string(std::string const&) (in /usr/lib/libstdc++.so.6.0.7)
==12697== by 0x1C3AD9E0: chargeRate::chargeRate(chargeRate const&) (in /root//app/libapp++.so)
==12697== by 0x1C4C9C22: __gnu_cxx::__mt_alloc_base<chargeRate>::construct(chargeRate*, chargeRate const&) (mt_allocator.h:585)
==12697== by 0x1C4CAC9F: std::vector<chargeRate, std::allocator<chargeRate> >::_M_insert_aux(__gnu_cxx::__normal_iterator<chargeRate*, std::vector<chargeRate, std::allocator<chargeRate> > >, chargeRate const&) (vector.tcc:284)
==12697== by 0x1C4CAF9E: std::vector<chargeRate, std::allocator<chargeRate> >::push_back(chargeRate const&) (stl_vector.h:610)
==12697== by 0x1C4C8A03: WebTranslations::getChargeDetails(std::vector<std::string, std::allocator<std::string> >&, std::vector<chargeRate, std::allocator<chargeRate> >&) (WebTranslations.cpp:427)
==12697== by 0x1C4C8F83: WebTranslations::getChargeTranslations(std::vector<std::string, std::allocator<std::string> >&, std::vector<std::string, std::allocator<std::string> >&) (WebTranslations.cpp:1172)
代码只是将结构插入 vector 。该结构中有一些字符串变量。如果进一步调试需要源代码,请告诉我。
一些来源:
typedef struct{
string chargeType; // The name of the charge type, eg "Date Units"
string unitSize;
string rate;
bool perConnection;
string cap;
bool useMaxDailyCharge;
string maxDailyCharge;
string identifier;
} chargeRate;
获取收费详情:
vector<chargeRate> my_vector;
my_vector.push_back(this->getChargeRateDetails(chargeStructureNames[i]));
获取充电率详细信息:
where : vector<vector<string> > StringMatrix
StringMatrix *results; //used to retrive results from database.
chargeRate chargeInformation;
...
//populate results, check them
..
chargeInformation.chargeType = (*results)[FIRST_ROW][CHARGE_TYPE];
return chargeInformation;
编辑:我知道这会返回一个“拷贝”.. 这已经完成了一些测试,我将其插入到通过引用传递的 vector 拷贝中。
干杯!
最佳答案
如果 getChargeRateDetails
通过引用返回,您正在尝试使用对已经超出范围的变量的引用。
关于c++ - 堆损坏 - Vector push_back,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4345177/