Hi all, I have an occasional crash in the following code:

jit_attr_setfloat_array( m_p_render, gensym("erase_color"), 4, draw_bg ? COL_BLACK : bg );

jit_object_method( m_p_render, gensym( "erase" ) );

jit_object_method_typed( m_p_text, gensym( "text"), 1, &a, NULL );

jit_object_method( m_p_render, gensym( "drawclients" ) );

The erase call works fine so the m_p_render object is good at that point. The crash is a SIGSEGV.

Just wondering what can cause the 'drawclients' to crash so I can try and figure out what it is - as said, it's an occasional crash, though can't seem to tie any particular circumstance to it.

        jit_attr_setfloat_array( m_p_render, gensym("erase_color"), 4, draw_bg ? COL_BLACK : bg );
        jit_object_method( m_p_render, gensym( "erase" ) );

        jit_atom_setsym( &a, gensym( p_str ) );
        jit_object_method_typed( m_p_text, gensym( "text"), 1, &a, NULL );

        jit_object_method( m_p_render, gensym( "drawclients" ) );     

sporadic-crash

Hard to know without more info (crash log, example patch, full source, etc.)

I'll try and get a crash log for it. Been running in the debugger to try and get a handle on it so will let it happen outside... cheers

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread

0 libsystem_kernel.dylib     0x00007fff994c5f06 __pthread_kill + 10

1 libsystem_pthread.dylib     0x00007fff9c91c4ec pthread_kill + 90

2 libsystem_c.dylib     0x00007fff8ede16df abort + 129

3 libsystem_malloc.dylib     0x00007fff8c414396 szone_error + 626

4 libsystem_malloc.dylib     0x00007fff8c409da6 small_malloc_from_free_list + 258

5 libsystem_malloc.dylib     0x00007fff8c406b64 szone_malloc_should_clear + 1411

6 libsystem_malloc.dylib     0x00007fff8c4065a1 malloc_zone_malloc + 71

7 libsystem_malloc.dylib     0x00007fff8c4050cc malloc + 42

8 libc++.1.dylib     0x00007fff9fc2d7de operator new(unsigned long) + 30

9 jit.gl.text     0x000000013a7890c5 FTVector::expand(unsigned long) + 83

10 jit.gl.text     0x000000013a789009 FTVector::push_back(FTGlyph* const&) + 33

11 jit.gl.text     0x000000013a788c75 FTGlyphContainer::FTGlyphContainer(FTFace*) + 97

12 jit.gl.text     0x000000013a7826ad FTFontImpl::FTFontImpl(FTFont*, char const*) + 167

13 jit.gl.text     0x000000013a784ee2 FTTextureFont::FTTextureFont(char const*) + 54

14 jit.gl.text     0x000000013a783acc ftglCreateTextureFont + 34

15 jit.gl.text     0x000000013a77d6ae jit_gl_text_newftglfont + 93

16 jit.gl.text     0x000000013a77ce7f jit_gl_text_draw + 57

17 com.cycling74.MaxPlugLib     0x0000000128699354 object_method_imp + 352

18 com.cycling74.JitterAPI     0x0000000137515105 jit_ob3d_drawimmediate + 313

19 com.cycling74.MaxPlugLib     0x0000000128699354 object_method_imp + 352

20 com.cycling74.JitterAPI     0x0000000137611d3e draw_client_callback + 525

21 com.cycling74.MaxPlugLib     0x0000000128607803 linklist_funall_imp + 141

22 com.cycling74.MaxAPI     0x00000001292c2954 linklist_funall + 52

23 com.cycling74.JitterAPI     0x0000000137611a00 ob3d_client_list_iterate_safe + 36

24 com.cycling74.JitterAPI     0x000000013761091d do_draw_clients + 1120

25 com.cycling74.JitterAPI     0x000000013760e9c9 jit_gl_scenegraph_draw + 159

26 com.cycling74.MaxPlugLib     0x0000000128699354 object_method_imp + 352

27 jit.gl.render     0x00000001378221d6 jit_gl_render_draw + 117

28 jit.gl.render     0x0000000137821247 jit_gl_render_drawclients + 89

29 com.cycling74.MaxPlugLib     0x0000000128699354 object_method_imp + 352

30 com.sigabort.lmh-p2d     0x00000001382602f2 Text_Matrix::draw_text(int, int, char const*, bool, bool) + 4562 (Text_Matrix.cpp:823)

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff994c5f06 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff9c91c4ec pthread_kill + 90
2   libsystem_c.dylib             	0x00007fff8ede16df abort + 129
3   libsystem_malloc.dylib        	0x00007fff8c414396 szone_error + 626
4   libsystem_malloc.dylib        	0x00007fff8c409da6 small_malloc_from_free_list + 258
5   libsystem_malloc.dylib        	0x00007fff8c406b64 szone_malloc_should_clear + 1411
6   libsystem_malloc.dylib        	0x00007fff8c4065a1 malloc_zone_malloc + 71
7   libsystem_malloc.dylib        	0x00007fff8c4050cc malloc + 42
8   libc++.1.dylib                	0x00007fff9fc2d7de operator new(unsigned long) + 30
9   jit.gl.text                   	0x000000013a7890c5 FTVector::expand(unsigned long) + 83
10  jit.gl.text                   	0x000000013a789009 FTVector::push_back(FTGlyph* const&) + 33
11  jit.gl.text                   	0x000000013a788c75 FTGlyphContainer::FTGlyphContainer(FTFace*) + 97
12  jit.gl.text                   	0x000000013a7826ad FTFontImpl::FTFontImpl(FTFont*, char const*) + 167
13  jit.gl.text                   	0x000000013a784ee2 FTTextureFont::FTTextureFont(char const*) + 54
14  jit.gl.text                   	0x000000013a783acc ftglCreateTextureFont + 34
15  jit.gl.text                   	0x000000013a77d6ae jit_gl_text_newftglfont + 93
16  jit.gl.text                   	0x000000013a77ce7f jit_gl_text_draw + 57
17  com.cycling74.MaxPlugLib      	0x0000000128699354 object_method_imp + 352
18  com.cycling74.JitterAPI       	0x0000000137515105 jit_ob3d_drawimmediate + 313
19  com.cycling74.MaxPlugLib      	0x0000000128699354 object_method_imp + 352
20  com.cycling74.JitterAPI       	0x0000000137611d3e draw_client_callback + 525
21  com.cycling74.MaxPlugLib      	0x0000000128607803 linklist_funall_imp + 141
22  com.cycling74.MaxAPI          	0x00000001292c2954 linklist_funall + 52
23  com.cycling74.JitterAPI       	0x0000000137611a00 ob3d_client_list_iterate_safe + 36
24  com.cycling74.JitterAPI       	0x000000013761091d do_draw_clients + 1120
25  com.cycling74.JitterAPI       	0x000000013760e9c9 jit_gl_scenegraph_draw + 159
26  com.cycling74.MaxPlugLib      	0x0000000128699354 object_method_imp + 352
27  jit.gl.render                 	0x00000001378221d6 jit_gl_render_draw + 117
28  jit.gl.render                 	0x0000000137821247 jit_gl_render_drawclients + 89
29  com.cycling74.MaxPlugLib      	0x0000000128699354 object_method_imp + 352
30  com.sigabort.lmh-p2d          	0x00000001382602f2 Text_Matrix::draw_text(int, int, char const*, bool, bool) + 4562 (Text_Matrix.cpp:823)


jit_object_method( m_p_matrix, _jit_sym_setinfo, &info );

jit_object_method( m_p_matrix, _jit_sym_getdata, &m_p_rendered_text_buf );

jit_attr_setsym( m_p_render, m_p_drawto_sym, m_p_text_matrix_name );

to change the dimension of a render but wasn't reregistering the name so I think I was accessing the old deleted object:

jit_object_register( m_p_matrix, m_p_text_matrix_name );

This seems to work without any sporadic crashes - so far....

        jit_object_method( m_p_matrix, _jit_sym_setinfo, &info );
        jit_object_method( m_p_matrix, _jit_sym_getdata, &m_p_rendered_text_buf );
        jit_attr_setsym( m_p_render, m_p_drawto_sym, m_p_text_matrix_name );

        jit_object_unregister( m_p_matrix );
        jit_object_method( m_p_matrix, _jit_sym_setinfo, &info );
        jit_object_method( m_p_matrix, _jit_sym_getdata, &m_p_rendered_text_buf );
        jit_object_register( m_p_matrix, m_p_text_matrix_name );
        jit_attr_setsym( m_p_render, m_p_drawto_sym, m_p_text_matrix_name );

This seems to work without any sporadic crashes - so far....


Sporadic crash