Differences between C++ 'new' operator and 'malloc()' (NOT a C/C++ question)

[Al Slater]

On 12/07/2012 16:59, Claude SIMON wrote:
> Ryan Johnson wrote:
>>
>> [...]
>>
>> Sorry, I should have actually looked at the repo before assuming the
>> test case was a monstrosity. By way of penance, I've now looked,
>> downloaded, tweaked, and tested it.
>>
>> [...]
>>
>
> Thanks for testing.
>
> I removed your test results (and the other stuff) from this message, not
> because I'm not interested into, but because I have a new problem, which
> prevents me to investigate further the original problem in the light of
> your test results.
>
> Since my last testings, I updated Cygwin, the JDK and the JRE. So, my
> current configuration is now :
>
> Windows Vista 32 bits SP2
> Cygwin 1.7.15
> g++ 4.5.3
> javac 1.7.0_05
> javah 1.7.0_05
> java 1.7.0_05
>
> When running the test case, I now have :
>
> $ java jcmc
> Loading library 'jcmc'...Exception in thread "main"
> java.lang.UnsatisfiedLinkError: H:\cvs\epeios\bugs\jcmc\jcmc.dll: L'accÞs
> Ó cet emplacement de la mÚmoire n'est pas valide
>          at java.lang.ClassLoader$NativeLibrary.load(Native Method)
>          at java.lang.ClassLoader.loadLibrary1(Unknown Source)
>          at java.lang.ClassLoader.loadLibrary0(Unknown Source)
>          at java.lang.ClassLoader.loadLibrary(Unknown Source)
>          at java.lang.Runtime.loadLibrary0(Unknown Source)
>          at java.lang.System.loadLibrary(Unknown Source)
>          at jcmc.main(jcmc.java:9)
>
> There is a French message which roughly means "The access to this memory
> location is not valid"
>
> I updated the test case to reflect your changes :
> 	- 'Makefile' now generates the '.h' file,
> 	- 'Makefile' does no more contain the '--stdcall-alias' linker flag,
> 	- the '.cpp' contains now the `extern "C"' directive,
> 	- the '.h' is removed from test case, since it's now generated by the
> 'Makefiile'.
>
> I have the new error message with this modified test case, but also with
> the original one. I suspect that the French error message is issued by
> Cygwin or by one of its sub-component, since the JVM never issued a
> message which wasn't in English, but Cygwin did.
>
> So, I have to postpone the study of the 'malloc()' related bug until I
> manage to resolve this new issue ; I then come back to your test results.
> But, meanwhile, if someone has an idea why I have this new error...
>
> Here again the address where the test case can be found :
> 	http://cvs.savannah.gnu.org/viewvc/epeios/bugs/jcmc/?root=epeios
>

Does 
http://cygwin.com/faq/faq.programming.html#faq.programming.msvs-mingw 
provide any help?

-- 
Al Slater



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