[haiku-bugs] Re: [Haiku] #6417: __printf_fphex crashes in haiku
- From: "zooey" <trac@xxxxxxxxxxxx>
- Date: Mon, 02 Aug 2010 21:11:24 -0000
#6417: __printf_fphex crashes in haiku
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Reporter: MrSunshine | Owner: zooey
Type: bug | Status: closed
Priority: normal | Milestone: R1
Component: System/libroot.so | Version: R1/Development
Resolution: invalid | Keywords:
Blocked By: | Has a Patch: 0
Platform: All | Blocking:
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Comment (by zooey):
Replying to [comment:4 bonefish]:
> The first format specification is `%x`, which expects a signed or
unsigned int, but the respective argument is `0.2f`, which is a float. The
float gets converted to double when passed via varargs, so this has indeed
a good chance to crash on any system where `sizeof(int) !=
sizeof(double)`, since part of the double argument will be interpreted as
a string pointer.
I told him that in IRC, yesterday - the only reason I kept this open is
that he mentioned the crash would be in !__printf_fphex(), which indicated
a problem during the formatting of the hex number. Since that should be
the last thing to actually work fine, it got me curious. But I have been
unable to reproduce crashes in !__printf_fphex(), it's either vfprintf()
or strlen() crashing, both of which would be explainable.
So there's really nothing special to learn from this.
--
Ticket URL: <http://dev.haiku-os.org/ticket/6417#comment:5>
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