Am 17.06.2011 17:49, schrieb Tom Hughes:
> On 17/06/11 16:45, Stephanie Stroka wrote:
>
>> I actually ignored three warnings. It's still a bit cryptic for me. For
>> example, I get the following msg:
>>
>> Invalid write of size 4
>> ==4427== at 0x405930: sort(unsigned int**, unsigned int, unsigned
>> int) (facedetect.cpp:293)
>> ==4427== by 0x407EA9: findScrambledArea(cv::Mat&) (facedetect.cpp:536)
>> ==4427== by 0x40AFFD: runOperation(Mode, CryptoKey const&,
>> DetectorParams&, std::string, std::string, std::string, bool)
>> (facedetect.cpp:625)
>> ==4427== by 0x40BCD8: main (facedetect.cpp:700)
>> ==4427== Address 0x11154010 is 0 bytes after a block of size 2,080
>> alloc'd
>> ==4427== at 0x4C2668A: malloc (vg_replace_malloc.c:236)
>> ==4427== by 0x4058CE: sort(unsigned int**, unsigned int, unsigned
>> int) (facedetect.cpp:287)
>> ==4427== by 0x407EA9: findScrambledArea(cv::Mat&) (facedetect.cpp:536)
>> ==4427== by 0x40AFFD: runOperation(Mode, CryptoKey const&,
>> DetectorParams&, std::string, std::string, std::string, bool)
>> (facedetect.cpp:625)
>> ==4427== by 0x40BCD8: main (facedetect.cpp:700)
>>
>>
>> My code at that position looks like this:
>>
>> 284 static uint* sort(uint** matrix, uint width, uint height) {
>> 285 uint* data = (uint*) malloc(width * height * sizeof(uint));
>> 286 uint i,j=0;
>> 287 for(i=0; i<height; i++) {
>> 288 for(j=0; j<width; j++) {
>> 289 data[j + i*height] = matrix[i][j];
>> 290 }
>> 291 }
>> ...
>>
>> I don't see why I'm using an invalid write of size 4. I'm retrieving an
>> uint and I'm writing an uint.
>
> The write it is complaining about is at line 293 and you haven't shown
> us that line ;-)
>
> What it is saying is that you are writing beyond the end of the array.
>
> Tom
>
Ups, sorry... I refactored the code and ran it again, but I didn't post
the correct log msg.
The log really points to line 289:
==4446== Invalid write of size 4
==4446== at 0x4058DF: sort(unsigned int**, unsigned int, unsigned
int) (facedetect.cpp:289)
==4446== by 0x407E39: findScrambledArea(cv::Mat&) (facedetect.cpp:531)
==4446== by 0x40AFFD: runOperation(Mode, CryptoKey const&,
DetectorParams&, std::string, std::string, std::string, bool)
(facedetect.cpp:620)
==4446== by 0x40BCD8: main (facedetect.cpp:695)
==4446== Address 0x11154010 is 0 bytes after a block of size 2,080 alloc'd
==4446== at 0x4C2668A: malloc (vg_replace_malloc.c:236)
==4446== by 0x40589D: sort(unsigned int**, unsigned int, unsigned
int) (facedetect.cpp:285)
==4446== by 0x407E39: findScrambledArea(cv::Mat&) (facedetect.cpp:531)
==4446== by 0x40AFFD: runOperation(Mode, CryptoKey const&,
DetectorParams&, std::string, std::string, std::string, bool)
(facedetect.cpp:620)
==4446== by 0x40BCD8: main (facedetect.cpp:695)
==4446==
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