[Mono-bugs] [Bug 634529] New: Mono runtime always allocates ~3MB of data for shared file info structs

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Wed Aug 25 16:34:37 EDT 2010



           Summary: Mono runtime always allocates ~3MB of data for shared
                    file info structs
    Classification: Mono
           Product: Mono: Runtime
           Version: SVN
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: io-layer
        AssignedTo: lupus at novell.com
        ReportedBy: mantas at unity3d.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US)
AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.126 Safari/533.4

The source, where the problem occurs:

175: #define _WAPI_FILESHARE_SIZE 102400
195: struct _WapiFileShare share_info[_WAPI_FILESHARE_SIZE];

This array (~3.0 MB) gets allocated almost every time on Android and iPhone
platforms when any of  handles are accessed and this code is unnecessary heap
hungry on mobile platforms.

Defining DISABLE_SHARED_HANDLES doesn't solve the case, because even in this
case memory gets allocated in :
_wapi_shm_attach (_wapi_shm_t type)                                             
        guint32 size;                                                           

        switch(type) {                                                          
        case WAPI_SHM_DATA:                                                     
                return g_malloc0 (sizeof(struct _WapiHandleSharedLayout));      

        case WAPI_SHM_FILESHARE:                                                
                return g_malloc0 (sizeof(struct _WapiFileShareLayout));         

                g_error ("Invalid type in _wapi_shm_attach ()");                
                return NULL;                                                    

Reproducible: Always

Steps to Reproduce:
1. Run mono application check native heap size
2. Reduce _WAPI_FILESHARE_SIZE to 1024 (instead of 102400)
3. Recompile mono & run app, native heap size is reduced by ~2.9 MB

Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.

More information about the mono-bugs mailing list