I'm a college student and in class we have learned about dynamically allocating arrays. I'm trying to learn how to detect for memory leaks but when i compile from the command line and run the application with debugging on i don't get a MEMORY LEAK DETECTED or anything of the sort. My code below to test for a memory leak:
If i compile and run with debugging in visual studio i do not get the memory error. the error should look something like this:
Detected memory leaks!
Dumping objects ->
{163} normal block at 0x002DD6E0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
If i create a win32 console application with the IDE itself and do the exact same thing i do get the memory leak detected. I would like to know if there is some compiler switch that i am missing or something else that i need to do. I like using Sublime Text 2 as my text editor and it would be a shame to open a new win32 console app from visual studio itself every time i want to check.
My build.bat file:
@echo off
echo Compilation Started %date% -%time%
IF NOT EXIST ..\build mkdir ..\build
pushd ..\build
cl -nologo -EHsc -W4 -WX -Zi ..\code\PE_2_WordCount_Lucas_Jones.cpp
popd
echo Compilation Finished %date% -%time%
Please help, I would prefer not to try and fix the color scheme and redo the key bindings in visual studio.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #define _CRTDBG_MAP_ALLOC #include <crtdbg.h> //place at end of all #include int main() { _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF); int * int_ptr = new int; int_ptr = 0; //delete int_ptr; return(0); } |
If i compile and run with debugging in visual studio i do not get the memory error. the error should look something like this:
Detected memory leaks!
Dumping objects ->
{163} normal block at 0x002DD6E0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
If i create a win32 console application with the IDE itself and do the exact same thing i do get the memory leak detected. I would like to know if there is some compiler switch that i am missing or something else that i need to do. I like using Sublime Text 2 as my text editor and it would be a shame to open a new win32 console app from visual studio itself every time i want to check.
My build.bat file:
@echo off
echo Compilation Started %date% -%time%
IF NOT EXIST ..\build mkdir ..\build
pushd ..\build
cl -nologo -EHsc -W4 -WX -Zi ..\code\PE_2_WordCount_Lucas_Jones.cpp
popd
echo Compilation Finished %date% -%time%
Please help, I would prefer not to try and fix the color scheme and redo the key bindings in visual studio.
I have found builtin MSVC memory leak detection functionality not very good. I strongly recommend using Visual Leak Detector if you are on Windows. It provides information about leaks in much nicer way.
Anyway, to use _CrtSetDbgFlag function check out what documentation says about it:
Probably project you created in MSVC had this define set in properties. Just add it to your commandline: "-D_DEBUG". You'll need also to switch to debug C runtime libraries, because release one (used by default) doesn't have CRT debugging functionality. Add "-MTd" to commandline.
Anyway, to use _CrtSetDbgFlag function check out what documentation says about it:
When _DEBUG is not defined, calls to _CrtSetDbgFlag are removed during preprocessing.
Probably project you created in MSVC had this define set in properties. Just add it to your commandline: "-D_DEBUG". You'll need also to switch to debug C runtime libraries, because release one (used by default) doesn't have CRT debugging functionality. Add "-MTd" to commandline.