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| author | Lassi Tuura <lat@cern.ch> | 2010-04-24 19:24:49 -0700 |
|---|---|---|
| committer | Arun Sharma <arun@sharma-home.net> | 2010-04-24 19:24:49 -0700 |
| commit | 045c55b2a296988c16a4c1b90f3d8b7e8b78752b (patch) | |
| tree | 7d2be91450ead7e845f04d6b03788a054654879e | |
| parent | d4fbc8326a91d246af29ff17131a12ed7ae87140 (diff) | |
| download | libunwind-045c55b2a296988c16a4c1b90f3d8b7e8b78752b.tar.gz | |
Be conservative in all pointer derefrences by default.
Since most people can't completely control their compile or runtime
environment, it becomes hard to ensure that unwind data is perfect.
| -rw-r--r-- | configure.in | 6 | ||||
| -rw-r--r-- | src/x86_64/Ginit_local.c | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/configure.in b/configure.in index fcc88137..e42445b2 100644 --- a/configure.in +++ b/configure.in @@ -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 diff --git a/src/x86_64/Ginit_local.c b/src/x86_64/Ginit_local.c index 70bef3e1..18b3d989 100644 --- a/src/x86_64/Ginit_local.c +++ b/src/x86_64/Ginit_local.c @@ -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); } |