diff options
| author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2012-01-03 19:09:56 +0100 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2012-01-13 12:22:59 +0100 |
| commit | 4c9b7f3c21ff21c199e54bfad2fdf3445fa4573d (patch) | |
| tree | 30d8a2f101cc1aa6e9b35273635fa9b3a6f2e1cf /libm/e_scalb.c | |
| parent | a7123b4744112deecb7aef771f224b680b4a02c0 (diff) | |
libc: allow to backtrace out of abort call
Build raise and abort function with dwarf2 info by using
-fasynchronous-unwind-tables to make backtrace() working across a
call to abort.
A scenario where it could be useful is within a signal handler that
wants to dump a backtrace when catching some signal (i.e SIGABRT).
Without having abort & raise built with DWARF2 information, it is not
possible for the libgcc stack unwinder to walk through the call stack
out of the abort/raise function.
Impacts in terms of size are really limited
Current
text data bss dec hex filename
164 0 0 164 a4 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.os
164 0 0 164 a4 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.oS
220 24 4 248 f8 ./libc/stdlib/abort.os
With (-fasynchronous-unwind-tables)
text data bss dec hex filename
216 0 0 216 d8 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.os
216 0 0 216 d8 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.oS
280 24 4 308 134 ./libc/stdlib/abort.os
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Acked-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libm/e_scalb.c')
0 files changed, 0 insertions, 0 deletions