Hi Benedikt,

The exact command which triggered the failure would be useful, usually it
is just above the "# Fatal ..." comment.

Have you tried make arm.debug armfloatabi=hard armv7=true armfpu=vfp (in
other word is your platform hard fp?)



On 4 July 2013 12:06, Ben Noordhuis <[email protected]> wrote:

> On Thu, Jul 4, 2013 at 12:07 PM, Benedikt Naessens <[email protected]>
> wrote:
> > I have a hard time finding the core dump (for some reason, apport doesn't
> > copy the core dump to /var/crash and in case apport is disabled no core
> dump
> > is made at all).
> >
> > Anyway, I've built V8 with the arm.debug configuration (make arm.debug
> -j4
> > OUTDIR=./my-output-folder snapshot=off armv7=true armfloatabi=soft
> > armfpu=vfp) and get the following stack trace:
> > #
> > # Fatal error in ../src/cached-powers.cc, line 159
> > # CHECK(cached_power.binary_exponent <= max_exponent) failed
> > #
> > ==== C stack trace ===============================
> >  1: V8_Fatal
> >  2:
> > v8::internal::PowersOfTenCache::GetCachedPowerForBinaryExponentRange(int,
> > int, v8::internal::DiyFp*, int*)
> >  3: ??
> >  4: v8::internal::FastDtoa(double, v8::internal::FastDtoaMode, int,
> > v8::internal::Vector<char>, int*, int*)
> >  5: v8::internal::DoubleToAscii(double, v8::internal::DtoaMode, int,
> > v8::internal::Vector<char>, int*, int*, int*)
> >  6: v8::internal::DoubleToCString(double, v8::internal::Vector<char>)
> >  7: v8::internal::Heap::NumberToString(v8::internal::Object*, bool,
> > v8::internUnhandled prefetch abort: breakpoint debug exception (0x002) at
> > 0x0070ab2c
> > al::PretenureFlag)
> >  8: ??
> >  9: v8::internal::Runtime_NumberToStringSkipCache(int,
> > v8::internal::Object**, v8::internal::Isolate*)
> > ==== JS stack trace =========================================
> > Security context: 0x4060a271 <JS Object>#0#
> >     1: ToString [native runtime.js:563] (this=0x4060abf1 <JS
> > Object>#1#,a=0x2dc1a92d <Number: 10.89>)
> >     5: /* anonymous */ [(shell):1] (this=0x4060a311 <JS Global
> Object>#2#)
> > ==== Details ================================================
> > [1]: ToString [native runtime.js:563] (this=0x4060abf1 <JS
> > Object>#1#,a=0x2dc1a92d <Number: 10.89>) {
> >   // expression stack (top to bottom)
> >   [00] : 0x2dc1a92d <Number: 10.89>
> > --------- s o u r c e   c o d e ---------
> > function ToString(a){?if((typeof(a)==='string'))return
> > a;?if((typeof(a)==='number'))return
> > %_NumberToString(a);?if((typeof(a)==='boolean'))return
> >
> a?'true':'false';?if((typeof(a)==='undefined'))return'undefined';?return((a===null))?'null':%ToString(%DefaultString(a));?}
> > -----------------------------------------
> > }
> > [5]: /* anonymous */ [(shell):1] (this=0x4060a311 <JS Global Object>#2#)
> {
> >   // stack-allocated locals
> >   var .result = 0x40608091 <undefined>
> >   // expression stack (top to bottom)
> >   [03] : 0x4061f285 <JS Function print (SharedFunctionInfo
> 0x4061f225)>#3#
> >   [02] : 0x2dc1a92d <Number: 10.89>
> >   [01] : 0x4060a311 <JS Global Object>#2#
> > --------- s o u r c e   c o d e ---------
> > print(3.3*3.3);?
> > -----------------------------------------
> > }
> > ==== Key         ============================================
> >  #0# 0x4060a271: 0x4060a271 <JS Object>
> >  #1# 0x4060abf1: 0x4060abf1 <JS Object>
> >  #2# 0x4060a311: 0x4060a311 <JS Global Object>
> >  #3# 0x4061f285: 0x4061f285 <JS Function print (SharedFunctionInfo
> > 0x4061f225)>
> > =====================
> > Trace/breakpoint trap (core dumped)
> >
> > Is this enough info ?
>
> Ah, so it's failing on a CHECK.  You may want to file a bug report for
> that.
>
> You mentioned a floating point exception in your original post.  I
> thought you meant that d8 got killed with a SIGFPU or a SIGILL.
>
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