On Wed, Jan 10, 2024 at 12:47 AM H.J. Lu <hjl.to...@gmail.com> wrote: > > When -fsanitize=hwaddress is used, libhwasan will try to enable LAM_U57 > in the startup code. Update the target check to enable hwaddress tests > if LAM_U57 is enabled. Also compile hwaddress tests with -mlam=u57 on > x86-64 since hwasan requires LAM_U57 on x86-64. I've tested it on lam enabled SRF, and it passed all hwasan testcases except below
FAIL: c-c++-common/hwasan/alloca-outside-caught.c -O0 output pattern test FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -O1 scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -O2 scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -O3 -g scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -Os scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -O2 -flto -fno-use-linker-plugin -flto-partition=none scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/hwasan-poison-optimisation.c -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects scan-assembler-times bl s*__hwasan_tag_mismatch4 1 FAIL: c-c++-common/hwasan/vararray-outside-caught.c -O0 output pattern test Basically they're testcase issues, the testcases needs to be adjusted for x86/ I'll commit a separate patch for those after this commit is upstream. Also I've also tested the patch on lam unsupported platforms, all hwasan testcases shows unsupported. So the patch LGTM. > > * lib/hwasan-dg.exp (check_effective_target_hwaddress_exec): > Return 1 if Intel LAM_U57 is enabled. > (hwasan_init): Add -mlam=u57 on x86-64. > --- > gcc/testsuite/lib/hwasan-dg.exp | 25 ++++++++++++++++++++++--- > 1 file changed, 22 insertions(+), 3 deletions(-) > > diff --git a/gcc/testsuite/lib/hwasan-dg.exp b/gcc/testsuite/lib/hwasan-dg.exp > index e9c5ef6524d..76057502ee6 100644 > --- a/gcc/testsuite/lib/hwasan-dg.exp > +++ b/gcc/testsuite/lib/hwasan-dg.exp > @@ -44,11 +44,25 @@ proc check_effective_target_hwaddress_exec {} { > #ifdef __cplusplus > extern "C" { > #endif > + extern int arch_prctl (int, unsigned long int *); > extern int prctl(int, unsigned long, unsigned long, unsigned long, > unsigned long); > #ifdef __cplusplus > } > #endif > int main (void) { > + #ifdef __x86_64__ > + # ifdef __LP64__ > + # define ARCH_GET_UNTAG_MASK 0x4001 > + # define LAM_U57_MASK (0x3fULL << 57) > + unsigned long mask = 0; > + if (arch_prctl(ARCH_GET_UNTAG_MASK, &mask) != 0) > + return 1; > + if (mask != ~LAM_U57_MASK) > + return 1; > + return 0; > + # endif > + return 1; > + #else > #define PR_SET_TAGGED_ADDR_CTRL 55 > #define PR_GET_TAGGED_ADDR_CTRL 56 > #define PR_TAGGED_ADDR_ENABLE (1UL << 0) > @@ -58,6 +72,7 @@ proc check_effective_target_hwaddress_exec {} { > || !prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0)) > return 1; > return 0; > + #endif > } > }] { > return 0; > @@ -102,6 +117,10 @@ proc hwasan_init { args } { > > setenv HWASAN_OPTIONS "random_tags=0" > > + if [istarget x86_64-*-*] { > + set target_hwasan_flags "-mlam=u57" > + } > + > set link_flags "" > if ![is_remote host] { > if [info exists TOOL_OPTIONS] { > @@ -119,12 +138,12 @@ proc hwasan_init { args } { > if [info exists ALWAYS_CXXFLAGS] { > set hwasan_saved_ALWAYS_CXXFLAGS $ALWAYS_CXXFLAGS > set ALWAYS_CXXFLAGS [concat "{ldflags=$link_flags}" $ALWAYS_CXXFLAGS] > - set ALWAYS_CXXFLAGS [concat "{additional_flags=-fsanitize=hwaddress > --param hwasan-random-frame-tag=0 -g $include_flags}" $ALWAYS_CXXFLAGS] > + set ALWAYS_CXXFLAGS [concat "{additional_flags=-fsanitize=hwaddress > $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags}" > $ALWAYS_CXXFLAGS] > } else { > if [info exists TEST_ALWAYS_FLAGS] { > - set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress --param > hwasan-random-frame-tag=0 -g $include_flags $TEST_ALWAYS_FLAGS" > + set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress > $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags > $TEST_ALWAYS_FLAGS" > } else { > - set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress --param > hwasan-random-frame-tag=0 -g $include_flags" > + set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress > $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags" > } > } > } > -- > 2.43.0 > -- BR, Hongtao