Subj : problems with error reporting
To : netscape.public.mozilla.jseng
From : Silviu Trasca
Date : Wed Jun 22 2005 02:08 am
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Hi,
I'm embedding SpiderMonkey in my app and have problems (invalid memory
reads) with error reporting for lines of code greater than 256
characters. I'm using an error handler similar with the one in js/js.c
.. I was able to reproduce the problem with "js" shell only (see the
valgrind output bellow). SpiderMonkey is compiled in thread safe mode,
on FC3.
Thanks,
Silviu
[silviu@home-tx0275arsq js]$ valgrind --tool=memcheck ./js
==10403== Memcheck, a memory error detector for x86-linux.
==10403== Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward et al.
==10403== Using valgrind-2.2.0, a program supervision framework for
x86-linux.
==10403== Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward et al.
==10403== For more details, rerun with: -v
==10403==
js>MM_preloadImages('/images/nav_catalog_f2.gif','/images/nav_new_f2.gif','/images/nav_acad_f2.gif','/images/nav_about_f2.gif','/images/top_contact_on.gif,'/images/top_booksellers_on.gif,'/images/top_map_on.gif,'/images/top_cart_on.gif,'/images/top_home_on.gif);
1: SyntaxError: unterminated string literal:
1: if);
1: ......==10403== Invalid read of size 1
==10403== at 0x804A880: my_ErrorReporter (in /home/silviu/projects/js/js)
==10403== by 0x8077AC4: js_ReportUncaughtException (in
/home/silviu/projects/js/js)
==10403== by 0x804E563: JS_CompileScript (in /home/silviu/projects/js/js)
==10403== by 0x8049407: Process (in /home/silviu/projects/js/js)
==10403== Address 0x1B969986 is 0 bytes after a block of size 6 alloc'd
==10403== at 0x1B902A90: malloc (vg_replace_malloc.c:131)
==10403== by 0x80B9F90: js_GetStringBytes (in /home/silviu/projects/js/js)
==10403== by 0x804F45D: JS_GetStringBytes (in /home/silviu/projects/js/js)
==10403== by 0x80ABEB4: js_ReportCompileErrorNumber (in
/home/silviu/projects/js/js)
....................................................................................................................................................................................................................................^
js>
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Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Hi,
I'm embedding SpiderMonkey in my app and have problems (invalid memory
reads) with error reporting for lines of code greater than 256
characters. I'm using an error handler similar with the one in js/js.c
.. I was able to reproduce the problem with "js" shell only (see the
valgrind output bellow). SpiderMonkey is compiled in thread safe mode,
on FC3.
Thanks,
Silviu
[silviu@home-tx0275arsq js]$ valgrind --tool=memcheck ./js
==10403== Memcheck, a memory error detector for x86-linux.
==10403== Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward et
al.
==10403== Using valgrind-2.2.0, a program supervision framework for
x86-linux.
==10403== Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward et
al.
==10403== For more details, rerun with: -v
==10403==
js>MM_preloadImages('/images/nav_catalog_f2.gif','/images/nav_new_f2.gif','/images/nav_acad_f2.gif','/images/nav_about_f2.gif','/images/top_contact_on.gif,'/images/top_booksellers_on.gif,'/images/top_map_on.gif,'/images/top_cart_on.gif,'/images/top_home_on.gif);
1: SyntaxError: unterminated string literal:
1: if);
1: ......==10403== Invalid read of size 1
==10403== at 0x804A880: my_ErrorReporter (in
/home/silviu/projects/js/js)
==10403== by 0x8077AC4: js_ReportUncaughtException (in
/home/silviu/projects/js/js)
==10403== by 0x804E563: JS_CompileScript (in
/home/silviu/projects/js/js)
==10403== by 0x8049407: Process (in /home/silviu/projects/js/js)
==10403== Address 0x1B969986 is 0 bytes after a block of size 6 alloc'd
==10403== at 0x1B902A90: malloc (vg_replace_malloc.c:131)
==10403== by 0x80B9F90: js_GetStringBytes (in
/home/silviu/projects/js/js)
==10403== by 0x804F45D: JS_GetStringBytes (in
/home/silviu/projects/js/js)
==10403== by 0x80ABEB4: js_ReportCompileErrorNumber (in
/home/silviu/projects/js/js)
....................................................................................................................................................................................................................................^
js>
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