Due to issues with my program I compiled with SAFE_HEAP=1. The single
message "Assertion failed: undefined" appears in the stdout box. Looking
at the stack trace in the console window I can see that it comes from
attempting to load an unaligned i32 value. The offending code is in
WinCreate in esUtil.c (which I borrowed from the tests directory). It is
static Display *x_display = NULL;
WinCreate(ESContext *esContext, const char* title)
{
...
x_display = XOpenDisplay(NULL)
if (x_display == NULL)
{
return EGL_FALSE;
}
root = DefaultRootWindow(x_display); <=== this is the line where the
assert happens
Is anyone aware of an issue with the X emulation? The corresponding JS
code is
var $9=SAFE_HEAP_LOAD(8, "%struct XDisplay*", 0, 0);
var $10=$9;
var $11=(($10+132)|0);
var $12=SAFE_HEAP_LOAD($11, "i32", 0, 0); <=== this is the line where the
assert happens.
132 (line 4) is a multiple of 4 so the only way $11 could not be a
multiple of 4 is if the struct XDisplay is not itself 4-byte aligned
which looks like a possible compiler bug.
------------------------------------------------------------------
Before I noticed that a stack trace was printed in the console, I set a
breakpoint in assert to find out where the assertion was coming from
and reloaded the page. The breakpoint was hit several times in other
places and with other real messages before I got fed up, removed the
breakpoint and hit continue. That is when the above message finally
appeared. None of the other messages appeared in the console or stdout
box. The ones I observed and noted before I removed the breakpoint were
"Cannot fallback to non-typed array case: Code is too specialized"
"Typed arrays 2 must be run on a little-endian system" // I *am*
running on a little-endian system
An assert in staticAlloc with a message: assert(!staticSealed)
What do these mean, why was nothing printed in the stdout box or console
and why did they not abort execution?
I am using Firefox 27.0.1
Regards
-Mark
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