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Be conservative in all pointer derefrences by default.

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Since most people can't completely control their compile or runtime
environment, it becomes hard to ensure that unwind data is perfect.
This commit is contained in:
Lassi Tuura 2010-04-24 19:24:49 -07:00 committed by Arun Sharma
parent d4fbc8326a
commit 045c55b2a2
2 changed files with 10 additions and 0 deletions
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6
configure.in
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@ -169,6 +169,12 @@ if test x$enable_block_signals = xyes; then
AC_DEFINE([CONFIG_BLOCK_SIGNALS], [], [Block signals before mutex operations])
fi
AC_ARG_ENABLE(conservative_checks,
[ --enable-conservative-checks Validate all memory addresses before use],
[enable_conservative_checks=$enableval], [enable_conservative_checks=yes])
if test x$enable_conservative_checks = xyes; then
CPPFLAGS="${CPPFLAGS} -DCONSERVATIVE_CHECKS"
fi
LIBUNWIND___THREAD

4
src/x86_64/Ginit_local.c
View file

@ -51,7 +51,11 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
c->dwarf.as = unw_local_addr_space;
c->dwarf.as_arg = c;
c->uc = uc;
#if CONSERVATIVE_CHECKS
c->validate = 1;
#else
c->validate = 0;
#endif
return common_init (c, 1);
}