[Bug compile/23672] New: compile command SEGVs computing target triplet pattern on non-Linux targets

[sandra at codesourcery dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23672

Bug ID: 23672
Summary: compile command SEGVs computing target triplet pattern
on non-Linux targets
Product: gdb
Version: HEAD
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: compile
Assignee: unassigned at sourceware dot org
Reporter: sandra at codesourcery dot com
Target Milestone: ---

The compile_to_object function in compile/compile.c has some logic to compute a
target triplet regexp from the gdbarch. This is causing a SEGV on non-Linux
targets because osabi_triplet_regexp returns NULL for every other flavor of
osabi -- see the gdb_osabi_names[] definition in osabi.c. The NULL pointer is
passed to the + string operator, which turns into the append method, which
tries to call strlen on the NULL pointer.

Even if an empty string were used instead of NULL, the resulting regexp would
be invalid. Probably this should just default to the target triplet GDB was
configured for?