thomastrapp
commented
2 years ago I cannot reproduce the issue on linux (debian testing, g++11.2.0) with libconfig release 1.7.3.
For example:
#include <cstdlib>
#include <string>
#include <iostream>
#include <libconfig.h++>
int main(int argc, char ** argv)
{
if( argc < 2 )
return EXIT_FAILURE;
auto i = std::stoul(argv[1]);
std::cout << "i = " << i << "\n";
while( i-- > 0 )
{
using namespace libconfig;
Config cfg;
cfg.setOptions(
Config::OptionFsync |
Config::OptionSemicolonSeparators |
Config::OptionColonAssignmentForGroups |
Config::OptionOpenBraceOnSeparateLine);
try
{
std::string outStr = "version = \"0.1.11\";\nwifi_ssid = \"123\";\nACB4383: \n{\n filename = \"client.p12\";\n cert_passwd = \"6f8\";\n log_path = \"\";\n sid = \"28\";\n write_log = 0;\n};\n";
cfg.readString(outStr.c_str());
}
catch(const ParseException &pex)
{
std::cerr << pex.getError() << "\n";
return EXIT_FAILURE;
}
catch (...)
{
return EXIT_FAILURE;
}
}
return EXIT_SUCCESS;
}g++ -o issue212 -Wall -O3 issue212.cpp -lconfig++
valgrind ./issue212 100000
# => ok, all heap blocks freed
valgrind --tool=massif ./issue212 100000
# => ok, heap usage remains stable at about 73kbCan you provide a SSCCE exhibiting the memory leak on your Mac?
ShadowZzj
I have this test code on Mac BigSur 11.2.3. And it appears that Config::readString() never release the memory it allocated(no exception occurs), the memory continue to raise and never drop down. When I comment out the line "cfg.readString()", the leak disappears. I have tested 1.7.2 and 1.7.3, all versions contain this issue. `
while (1) { int result = 0; Config cfg; cfg.setOptions(Config::OptionFsync | Config::OptionSemicolonSeparators | Config::OptionColonAssignmentForGroups | Config::OptionOpenBraceOnSeparateLine); try { std::string outStr = "version = \"0.1.11\";\nwifi_ssid = \"123\";\n1ACB-4383- : \n{\n filename = \"client.p12\";\n cert_passwd = \"6f8\";\n log_path = \"\";\n sid = \"28\";\n write_log = 0;\n};\n" ; cfg.readString(outStr.c_str()); } catch (const FileIOException &fioex) { result = -2; return result; } catch (const ParseException &pex) { result = -3; return result; } catch (...) { return -4; } }
`