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IDProjectCategoryView StatusDate SubmittedLast Update
0030757Open CASCADE[OCCT] OCCT:Modeling Algorithmspublic2019-05-30 10:462019-06-05 09:19
Reporterszy 
Assigned Tomsv 
PrioritynormalSeverityminor 
StatusnewResolutionopen 
PlatformWindowsOSVC++ 2015OS Version64 bit
Product Version[OCCT] 7.3.0 
Target Version[OCCT] 7.4.0*Fixed in Version 
Summary0030757: Memory leaks using Open CasCade
DescriptionThe customer complaint is below:
"We have found that there are memory leaks in OpenCascade.
It seems that most of the leaks are related the use of TBB (IntelĀ® Threading Building Blocks), which is an optional component.
We tried out that not using TBB solves the related memory leak problems, and the speed of execution was just slightly affected."

Configuration used: Windows 10 & VStudio 2015 & 64 bit.

The delivered sample gives the next output:

"Detected memory leaks!
Dumping objects ->
{13589} normal block at 0x000001D51BA746A0, 520 bytes long.
 Data: < p > 04 00 00 00 00 00 00 00 70 7F 89 1D D5 01 00 00
{13588} normal block at 0x000001D51BA2F910, 520 bytes long.
 Data: < > 04 00 00 00 00 00 00 00 B0 7F 89 1D D5 01 00 00
{13587} normal block at 0x000001D51BA29740, 520 bytes long.
 Data: < > 04 00 00 00 00 00 00 00 F0 7F 89 1D D5 01 00 00
{173} normal block at 0x000001D51BA19550, 16 bytes long.
 Data: < * > A8 F3 2A FC FD 7F 00 00 01 CD CD CD CD CD CD CD
Object dump complete.
The program '[21000] LeakageExample.exe' has exited with code 0 (0x0).
"
The archive LeakageExampleV4.zip(~ 90 MB) is available at \\SZY\SHARE\BIMO folder.
Steps To Reproduce1.Explode archive
2.Open "LeakageExample.sln" with VStudio 2015
3.Build it
4.Start application: menu "Debug/Start Debugging"

Output reports:
"Detected memory leaks!"
TagsNo tags attached.
Test case number
Attached Files

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-  Notes
(0084839)
kgv (developer)
2019-06-05 09:19
edited on: 2019-06-05 09:19

Sergey, could you please comment if customer's application actually suffers from severe memory leaks (e.g. leading to continuous grow of memory usage of noticeable amounts),
or just observed some memory flows detected by runtime memory analyzer?


- Issue History
Date Modified Username Field Change
2019-05-30 10:46 szy New Issue
2019-05-30 10:46 szy Assigned To => msv
2019-05-31 10:09 msv Description Updated View Revisions
2019-06-05 09:19 kgv Note Added: 0084839
2019-06-05 09:19 kgv Note Edited: 0084839 View Revisions


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