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* [gcc r14-8410] Enable -mlam=u57 by default when compiled with -fsanitize=hwaddress.
@ 2024-01-25 4:42 hongtao Liu
0 siblings, 0 replies; only message in thread
From: hongtao Liu @ 2024-01-25 4:42 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:73f0a1a70c22e4d117ece7ddfa53661bb74137d4
commit r14-8410-g73f0a1a70c22e4d117ece7ddfa53661bb74137d4
Author: liuhongt <hongtao.liu@intel.com>
Date: Tue Jan 23 14:21:58 2024 +0800
Enable -mlam=u57 by default when compiled with -fsanitize=hwaddress.
gcc/ChangeLog:
* config/i386/i386-options.cc (ix86_option_override_internal):
Enable -mlam=u57 by default when compiled with
-fsanitize=hwaddress.
Diff:
---
gcc/config/i386/i386-options.cc | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index b6f634e9a32..e66a58ed926 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -2189,6 +2189,15 @@ ix86_option_override_internal (bool main_args_p,
&& opts->x_ix86_abi != DEFAULT_ABI)
error ("%<-mabi=%s%> not supported with %<-fsanitize=thread%>", abi_name);
+ /* Hwasan is supported with lam_u57 only. */
+ if (opts->x_flag_sanitize & SANITIZE_HWADDRESS)
+ {
+ if (ix86_lam_type == lam_u48)
+ warning (0, "%<-mlam=u48%> is not compatible with Hardware-assisted "
+ "AddressSanitizer, override to %<-mlam=u57%>");
+ ix86_lam_type = lam_u57;
+ }
+
/* For targets using ms ABI enable ms-extensions, if not
explicit turned off. For non-ms ABI we turn off this
option. */
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