diff options
| -rw-r--r-- | gcc/asan.h | 7 | ||||
| -rw-r--r-- | gcc/builtins.cc | 3 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/hwasan/builtin-special-handling.c | 18 |
3 files changed, 17 insertions, 11 deletions
@@ -185,8 +185,13 @@ extern hash_set<tree> *asan_handled_variables; inline bool asan_intercepted_p (enum built_in_function fcode) { + /* This list should be kept up-to-date with upstream's version at + compiler-rt/lib/hwasan/hwasan_platform_interceptors.h. */ if (hwasan_sanitize_p ()) - return false; + return fcode == BUILT_IN_MEMCMP + || fcode == BUILT_IN_MEMCPY + || fcode == BUILT_IN_MEMMOVE + || fcode == BUILT_IN_MEMSET; return fcode == BUILT_IN_INDEX || fcode == BUILT_IN_MEMCHR diff --git a/gcc/builtins.cc b/gcc/builtins.cc index 1d54ea0..4c04ae0 100644 --- a/gcc/builtins.cc +++ b/gcc/builtins.cc @@ -7791,7 +7791,8 @@ expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode, default: break; } - if (sanitize_flags_p (SANITIZE_ADDRESS) && asan_intercepted_p (fcode)) + if (sanitize_flags_p (SANITIZE_ADDRESS | SANITIZE_HWADDRESS) + && asan_intercepted_p (fcode)) return expand_call (exp, target, ignore); /* When not optimizing, generate calls to library functions for a certain diff --git a/gcc/testsuite/c-c++-common/hwasan/builtin-special-handling.c b/gcc/testsuite/c-c++-common/hwasan/builtin-special-handling.c index a7a6d91..f975baa 100644 --- a/gcc/testsuite/c-c++-common/hwasan/builtin-special-handling.c +++ b/gcc/testsuite/c-c++-common/hwasan/builtin-special-handling.c @@ -8,24 +8,24 @@ /* { dg-skip-if "" { *-*-* } { "-flto" } { "-flto-partition=none" } } */ typedef __SIZE_TYPE__ size_t; -/* Functions to observe that HWASAN instruments memory builtins in the expected - manner. */ +/* HWASAN used to instrument calls to memset, memcpy, and memmove. It no + longer does this. Many other string and memory builtins are intercepted by + the runtime (and hence the codegen need not do anything). */ void * __attribute__((noinline)) memset_builtin (void *dest, int value, size_t len) { return __builtin_memset (dest, value, len); } -/* HWASAN avoids strlen because it doesn't know the size of the memory access - until *after* the function call. */ size_t __attribute__ ((noinline)) strlen_builtin (char *element) { return __builtin_strlen (element); } -/* First test ensures that the HWASAN_CHECK was emitted before the - memset. Second test ensures there was only HWASAN_CHECK (which demonstrates - that strlen was not instrumented). */ -/* { dg-final { scan-tree-dump-times "HWASAN_CHECK.*memset" 1 "asan1" } } */ -/* { dg-final { scan-tree-dump-times "HWASAN_CHECK" 1 "asan1" } } */ +/* First check here ensures there is no inline instrumentation generated for + these builtins. Second checks that we end up calling memset (i.e. that it's + not optimised into an inline operation, which would happen without the + instrumentation). */ +/* { dg-final { scan-tree-dump-not "HWASAN_CHECK" "asan1" } } */ +/* { dg-final { scan-assembler-times "\tmemset\\M" 1 } } */ |