[cairo] Crash in 1.8.6 win32 with PDF surface

Darren Gallagher dazzag at gmail.com
Mon Apr 27 02:21:35 PDT 2009


Hi,

Just tried adding in the call to cairo_surface_finish().   It still
crashes.  Code now as follows:

cairo_surface_t *surface;
    cairo_t *cr;

    surface = cairo_pdf_surface_create ("hellocairo.pdf" , 504, 648);
    cr = cairo_create (surface);
    cairo_set_source_rgb(cr, 0, 0, 0);
    cairo_select_font_face (cr, "serif", CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
    cairo_set_font_size (cr, 40.0);
    cairo_move_to(cr, 10.0, 50.0);
    cairo_show_text(cr, "Hello, Cairo!");
    //drawDashLine(cr);
    cairo_show_page(cr);
    cairo_surface_finish(surface);
    cairo_surface_destroy(surface);
    cairo_destroy(cr);

Stack trace:

     ntdll.dll!7c90120e()
     [Frames below may be incorrect and/or missing, no symbols loaded for
ntdll.dll]
     ntdll.dll!7c96e139()
     ntdll.dll!7c96e576()
     ntdll.dll!7c9622e8()
     kernel32.dll!7c85f9a7()
     msvcr80d.dll!_CrtIsValidHeapPointer(const void * pUserData=0x00955c48)
Line 2072    C++
     msvcr80d.dll!_free_dbg_nolock(void * pUserData=0x00955c48, int
nBlockUse=1)  Line 1279 + 0x9 bytes    C++
     msvcr80d.dll!_free_dbg(void * pUserData=0x00955c48, int nBlockUse=1)
Line 1220 + 0xd bytes    C++
     msvcr80d.dll!free(void * pUserData=0x00955c48)  Line 1178 + 0xb
bytes    C++
     libcairod.dll!_cairo_truetype_subset_fini(_cairo_truetype_subset *
subset=0x0012f4c0)  Line 1171 + 0xe bytes    C

libcairod.dll!_cairo_pdf_surface_emit_truetype_font_subset(_cairo_pdf_surface
* surface=0x00436fe0, _cairo_scaled_font_subset * font_subset=0x0012f75c)
Line 3451 + 0xc bytes    C

libcairod.dll!_cairo_pdf_surface_emit_unscaled_font_subset(_cairo_scaled_font_subset
* font_subset=0x0012f75c, void * closure=0x00436fe0)  Line 3722 + 0xd
bytes    C
     libcairod.dll!_cairo_sub_font_collect(void * entry=0x0043af78, void *
closure=0x0012f8a8)  Line 578 + 0x15 bytes    C

libcairod.dll!_cairo_scaled_font_subsets_foreach_internal(_cairo_scaled_font_subsets
* font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void
*)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0,
cairo_subsets_foreach_type_t type=CAIRO_SUBSETS_FOREACH_UNSCALED)  Line 889
+ 0xd bytes    C

libcairod.dll!_cairo_scaled_font_subsets_foreach_unscaled(_cairo_scaled_font_subsets
* font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *, void
*)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0)  Line 918 +
0x13 bytes    C
     libcairod.dll!_cairo_pdf_surface_emit_font_subsets(_cairo_pdf_surface *
surface=0x00436fe0)  Line 3774 + 0x18 bytes    C
     libcairod.dll!_cairo_pdf_surface_finish(void *
abstract_surface=0x00436fe0)  Line 1195 + 0x9 bytes    C
     libcairod.dll!cairo_surface_finish(_cairo_surface *
surface=0x00436fe0)  Line 530 + 0x10 bytes    C
     libcairod.dll!_cairo_paginated_surface_finish(void *
abstract_surface=0x00433998)  Line 172 + 0xf bytes    C
     libcairod.dll!cairo_surface_finish(_cairo_surface *
surface=0x00433998)  Line 530 + 0x10 bytes    C
>    hellocairo.exe!main(int argc=2, char * * argv=0x00436f58)  Line 48 +
0xc bytes    C
     hellocairo.exe!__tmainCRTStartup()  Line 597 + 0x19 bytes    C
     hellocairo.exe!mainCRTStartup()  Line 414    C
     kernel32.dll!7c817077()

Thanks

2009/4/24 Behdad Esfahbod <behdad at behdad.org>

> On 04/24/2009 11:59 AM, Gerdus van Zyl wrote:
>
>> Try reversing the lines:
>>     cairo_surface_destroy(surface);
>>     cairo_destroy(cr);
>>
>> destroying the surface before the context looks suspect. and when
>> working with PDF you might want a cairo_surface_finish before
>> destroying.
>>
>
> The context has a reference to the surface.  And _finish should be called
> automatically *if* the last reference to the surface is dropped.  So,
> calling it would be a good test to see if that's the problem.
>
> behdad
>
>
>  On Fri, Apr 24, 2009 at 4:17 PM, Darren Gallagher<dazzag at gmail.com>
>>  wrote:
>>
>>> Using 1.8.6 on windows (with pixman 0.15.2).  Built using instructions
>>> here:
>>>
>>> http://www.williamcyap.com/software/cairo-lib/compiling-cairo-for-windows.xhtml
>>>
>>> produces a crash witin cairo_destroy() somewhere.
>>>
>>> The code is as follows:
>>>
>>> #include<cairo.h>
>>> #include<cairo-pdf.h>
>>>
>>> int main (int argc, char *argv[])
>>> {
>>>     cairo_surface_t *surface;
>>>     cairo_t *cr;
>>>
>>>     surface = cairo_pdf_surface_create ("hellocairo.pdf" , 504, 648);
>>>     cr = cairo_create (surface);
>>>     cairo_set_source_rgb(cr, 0, 0, 0);
>>>     cairo_select_font_face (cr, "serif", CAIRO_FONT_SLANT_NORMAL,
>>> CAIRO_FONT_WEIGHT_NORMAL);
>>>     cairo_set_font_size (cr, 40.0);
>>>     cairo_move_to(cr, 10.0, 50.0);
>>>     cairo_show_text(cr, "Hello, Cairo!");
>>>     cairo_show_page(cr);
>>>     cairo_surface_destroy(surface);
>>>     cairo_destroy(cr);
>>>
>>>     return 0;
>>> }
>>>
>>> the stack is as follows:
>>>
>>>      ntdll.dll!7c90120e()
>>>      [Frames below may be incorrect and/or missing, no symbols loaded for
>>> ntdll.dll]
>>>      ntdll.dll!7c96c201()
>>>      ntdll.dll!7c96c63e()
>>>      ntdll.dll!7c9603b0()
>>>      kernel32.dll!7c85f8d7()
>>>      msvcr80d.dll!_CrtIsValidHeapPointer(const void *
>>> pUserData=0x00955c50)
>>> Line 2072    C++
>>>      msvcr80d.dll!_free_dbg_nolock(void * pUserData=0x00955c50, int
>>> nBlockUse=1)  Line 1279 + 0x9 bytes    C++
>>>      msvcr80d.dll!_free_dbg(void * pUserData=0x00955c50, int nBlockUse=1)
>>> Line 1220 + 0xd bytes    C++
>>>      msvcr80d.dll!free(void * pUserData=0x00955c50)  Line 1178 + 0xb
>>> bytes    C++
>>>      libcairod.dll!_cairo_truetype_subset_fini(_cairo_truetype_subset *
>>> subset=0x0012f22c)  Line 1171 + 0xe bytes    C
>>>
>>>
>>> libcairod.dll!_cairo_pdf_surface_emit_truetype_font_subset(_cairo_pdf_surface
>>> * surface=0x00436fe0, _cairo_scaled_font_subset * font_subset=0x0012f4c8)
>>> Line 3451 + 0xc bytes    C
>>>
>>>
>>> libcairod.dll!_cairo_pdf_surface_emit_unscaled_font_subset(_cairo_scaled_font_subset
>>> * font_subset=0x0012f4c8, void * closure=0x00436fe0)  Line 3722 + 0xd
>>> bytes    C
>>>      libcairod.dll!_cairo_sub_font_collect(void * entry=0x0043af78, void
>>> *
>>> closure=0x0012f614)  Line 578 + 0x15 bytes    C
>>>
>>>
>>> libcairod.dll!_cairo_scaled_font_subsets_foreach_internal(_cairo_scaled_font_subsets
>>> * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *,
>>> void
>>> *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0,
>>> cairo_subsets_foreach_type_t type=CAIRO_SUBSETS_FOREACH_UNSCALED)  Line
>>> 889
>>> + 0xd bytes    C
>>>
>>>
>>> libcairod.dll!_cairo_scaled_font_subsets_foreach_unscaled(_cairo_scaled_font_subsets
>>> * font_subsets=0x004386b8, _cairo_status (_cairo_scaled_font_subset *,
>>> void
>>> *)* font_subset_callback=0x100b67a0, void * closure=0x00436fe0)  Line 918
>>> +
>>> 0x13 bytes    C
>>>
>>>  libcairod.dll!_cairo_pdf_surface_emit_font_subsets(_cairo_pdf_surface *
>>> surface=0x00436fe0)  Line 3774 + 0x18 bytes    C
>>>      libcairod.dll!_cairo_pdf_surface_finish(void *
>>> abstract_surface=0x00436fe0)  Line 1195 + 0x9 bytes    C
>>>      libcairod.dll!cairo_surface_finish(_cairo_surface *
>>> surface=0x00436fe0)  Line 530 + 0x10 bytes    C
>>>      libcairod.dll!_cairo_paginated_surface_finish(void *
>>> abstract_surface=0x00433998)  Line 172 + 0xf bytes    C
>>>      libcairod.dll!cairo_surface_finish(_cairo_surface *
>>> surface=0x00433998)  Line 530 + 0x10 bytes    C
>>>      libcairod.dll!cairo_surface_destroy(_cairo_surface *
>>> surface=0x00433998)  Line 435 + 0x9 bytes    C
>>>      libcairod.dll!_cairo_gstate_fini(_cairo_gstate * gstate=0x00438a30)
>>> Line 205 + 0xf bytes    C
>>>      libcairod.dll!cairo_destroy(_cairo * cr=0x00438a10)  Line 228 + 0xc
>>> bytes    C
>>>
>>>>     hellocairo.exe!main(int argc=2, char * * argv=0x00436f58)  Line 49 +
>>>> 0xc bytes    C
>>>>
>>>      hellocairo.exe!__tmainCRTStartup()  Line 597 + 0x19 bytes    C
>>>      hellocairo.exe!mainCRTStartup()  Line 414    C
>>>      kernel32.dll!7c817067()
>>>
>>> Any help appreciated.
>>>
>>> Thanks
>>>
>>> Daz
>>>
>>>
>>> _______________________________________________
>>> cairo mailing list
>>> cairo at cairographics.org
>>> http://lists.cairographics.org/mailman/listinfo/cairo
>>>
>>>  _______________________________________________
>> cairo mailing list
>> cairo at cairographics.org
>> http://lists.cairographics.org/mailman/listinfo/cairo
>>
>>
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