https://sourceware.org/bugzilla/show_bug.cgi?id=25244
Bug ID: 25244
Summary: --print-memory-usage, division by zero if MEMORY
length is zero
Product: binutils
Version: 2.34 (HEAD)
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: pexu at sourceware dot mail.kapsi.fi
Target Milestone: ---
Hi.
lang_print_memory_usage() at ld/ldlang.c calculates and displays the memory
region usage as follows:
9282 percent = used_length * 100.0 / r->length;
9284 printf (" %6.2f%%\n", percent);
If the memory region length is zero (denoted by r->length), this will cause
division by zero. Likely no other harm is done, except not all printf
implementations adhere to e.g. IEEE 1003.1 (POSIX specifications), causing some
implementation specific format to be shown when a NaN is passed (or -NaN, given
that the floating point implementation behaves as such).
E.g. MinGW targets (as they use MS Visual C library) display `[-]1.#J'
(`[-]1#IND' truncated to %6.2f). This might cause issues if a tool that uses
the output data does not except this kind of behaviour (wouldn't call this
undefined by any means).
--
You are receiving this mail because:
You are on the CC list for the bug.
