Re: Some observations building gnuplot for win by gcc-4.9.2 (MinGW64)

[Tatsuro M. <tma...@ya...>]

----- Original Message -----
>From: Ethan A Merritt 
>To: gnuplot-beta@ Tatsuro MATSUOKA 
>Date: 2015/3/4, Wed 05:29
>Subject: Re: Some observations building gnuplot for win by gcc-4.9.2 (MinGW64)
> 
>
> 
>On Tuesday, 03 March, 2015 16:16:01 Tatsuro MATSUOKA wrote:
>> Hello
>> 
>> I have tried to update gcc for windows build of gnuplot from ver. 4.9.0 to 4.9.2.
>> Some observations happened for both 64 bit and 32 bit build.
>> 
>> 
>> Complier gcc-4.9.2-2 from MinGW-64 project
>> 64 bit : exception:seh, thread:win32 
>> 32 bit : exception:dwarf2, thread:win32 
>> 
>> Good point
>> 
>>  I can built gd-2.1.1 flawlessly for both 64 bit and 32 bit platform.
>> 
>> 
>> Troubles ?
>> **********
>> 64 bit
>> **********
>[snip]
> 
>> 32 bit
>> ******
>> gnuplot crashes by segmentation fault when one use cairo based terminals.
>> 
>> Segmentation fault : g_utf8_validate gutf8.c:1634 on MinGW-64 32 bit gcc-4.9.2
>> 
>> I have met a  Segmentation fault at using gnuplot-5.1 built by myself on windows.
>> The Segmentation fault seems to be related with the cairo based terminals.
>> (The cairo based terminals use libglib.)
>> 
>> Compiler gcc-4.9.2 (MinGW-w64 32bit. dwarf, win32 thread).
>> Glib version : 2.42.1. Build from source.
>> 
>> gdb message:
>> 
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x6862318f in g_utf8_validate (str=0x2888a68 "-1", max_len=-1, end=0xffffffff)
>>     at ../../glib-2.42.1/glib/gutf8.c:1634
>> 1634        *end = p;
>> 
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x6862318f in g_utf8_validate (str=0xb28a68 "-1", max_len=-1, end=0xffffffff)
>>     at ../../glib-2.42.1/glib/gutf8.c:1634
>> 1634        *end = p;
>> 
>> 
>> Perhaps this is a bug of glib (2.42.1 and 2.33.14).
>> 
>> I have filed the issue to  the bug tracker of Gnome.
>>  
>> https://bugzilla.gnome.org/show_bug.cgi?id=745485
>> 
>> At this moment, I abandon the complier update. However, is the trouble 2 for 64 bit case not a issue of gnuplot code?
> 
>That is possible.
>Can you provide a more complete trace of the segfault that
>shows where in the gnuplot code this failure happened?
> 
>Ethan
> 


Thank you for your response:

I copy the back trace.

For wxt terminal,
(gdb) bt
#0  0x6862318f in g_utf8_validate (str=0x2a97fc8 "-1", max_len=-1,
    end=0xffffffff) at ../../glib-2.42.1/glib/gutf8.c:1634
#1  0x00529d21 in gp_cairo_convert (plot=0x2a0e0f0, string=0x2a97fc8 "-1")
    at ../../src/wxterminal/gp_cairo.c:737
#2  0x0052b6bc in gp_cairo_enhanced_flush (plot=0x2a0e0f0)
    at ../../src/wxterminal/gp_cairo.c:1311
#3  0x00525eb9 in wxtPanel::wxt_cairo_exec_command (this=0x2a0df40,
    command=...) at ../../src/wxterminal/wxt_gui.cpp:2964
#4  0x005257a9 in wxtPanel::wxt_cairo_refresh (this=0x2a0df40)
    at ../../src/wxterminal/wxt_gui.cpp:2850
#5  0x00523e67 in wxt_text () at ../../src/wxterminal/wxt_gui.cpp:2047
#6  0x0045d368 in wxt_text_wrapper () at ../../term/wxt.trm:460
#7  0x0040e560 in term_end_plot () at ../../src/term.c:544
#8  0x004f2f8f in do_plot (plots=0x29f8520, pcount=1)
    at ../../src/graphics.c:912
#9  0x004c324e in eval_plots () at ../../src/plot2d.c:3333
#10 0x004b4ac5 in plotrequest () at ../../src/plot2d.c:271
#11 0x004acb3d in plot_command () at ../../src/command.c:1535
#12 0x004aacb8 in command () at ../../src/command.c:621
#13 0x004aa58d in do_line () at ../../src/command.c:418
#14 0x004aa2cd in com_line () at ../../src/command.c:322
#15 0x004b1518 in gnu_main (argc=0, argv=0x29e5818) at ../../src/plot.c:660
#16 0x0053545b in WinMain@16 (hInstance=0x400000, hPrevInstance=0x0,
    lpszCmdLine=0xa959c9 "", nCmdShow=10) at ../../src/win/winmain.c:593
#17 0x0057a31d in main ()


For pngcairo terminal
(gdb) bt
#0  0x6862318f in g_utf8_validate (str=0x28f596 "-1", max_len=-1,
    end=0xffffffff) at ../../glib-2.42.1/glib/gutf8.c:1634
#1  0x00529d21 in gp_cairo_convert (plot=0x6088c0 <plot>,
    string=0x28f596 "-1") at ../../src/wxterminal/gp_cairo.c:737
#2  0x00529fbd in gp_cairo_draw_text (plot=0x6088c0 <plot>, x1=1100, y1=8842,
    string=0x28f596 "-1", width=0x0, height=0x0)
    at ../../src/wxterminal/gp_cairo.c:850
#3  0x0045f1ab in cairotrm_put_text (x=1100, y=758, string=0x28f596 "-1")
    at ../../term/cairo.trm:989
#4  0x0040e9fc in write_multiline (x=1100, y=758, text=0x28f596 "-1",
    hor=RIGHT, vert=JUST_CENTRE, angle=0, font=0x0) at ../../src/term.c:781
#5  0x004fd5d5 in ytick2d_callback (axis=FIRST_Y_AXIS, place=-1,
    text=0x28f596 "-1", ticlevel=0, grid=..., userlabels=0x0)
    at ../../src/graphics.c:3446
#6  0x0047fb09 in gen_tics (axis=FIRST_Y_AXIS,
    callback=0x4fcff4 <ytick2d_callback>) at ../../src/axis.c:1274
#7  0x00480603 in axis_output_tics (axis=FIRST_Y_AXIS,
    ticlabel_position=0x60bbac <ytic_x>, zeroaxis_basis=FIRST_X_AXIS,
    callback=0x4fcff4 <ytick2d_callback>) at ../../src/axis.c:1484
#8  0x004f11c4 in place_grid () at ../../src/graphics.c:217
#9  0x004f21a1 in do_plot (plots=0xde86f0, pcount=1)
    at ../../src/graphics.c:551
#10 0x004c324e in eval_plots () at ../../src/plot2d.c:3333
#11 0x004b4ac5 in plotrequest () at ../../src/plot2d.c:271
#12 0x004acb3d in plot_command () at ../../src/command.c:1535
#13 0x004aacb8 in command () at ../../src/command.c:621
#14 0x004aa58d in do_line () at ../../src/command.c:418
#15 0x004aa2cd in com_line () at ../../src/command.c:322
#16 0x004b1518 in gnu_main (argc=0, argv=0xdd5818) at ../../src/plot.c:660
#17 0x0053545b in WinMain@16 (hInstance=0x400000, hPrevInstance=0x0,
    lpszCmdLine=0x8a59c9 "", nCmdShow=10) at ../../src/win/winmain.c:593
#18 0x0057a31d in main ()
(gdb)