Add NetBSD improvements in sanitizers

Summary:
Changes:

 * Add initial msan stub support.
 * Handle NetBSD specific pthread_setname_np(3).
 * NetBSD supports __attribute__((tls_model("initial-exec"))),
   define it in SANITIZER_TLS_INITIAL_EXEC_ATTRIBUTE.
 * Add ReExec() specific bits for NetBSD.
 * Simplify code and add syscall64 and syscall_ptr for !NetBSD.
 * Correct bunch of syscall wrappers for NetBSD.
 * Disable test/tsan/map32bit on NetBSD as not applicable.
 * Port test/tsan/strerror_r to a POSIX-compliant OSes.
 * Disable __libc_stack_end on NetBSD.
 * Disable ReadNullSepFileToArray() on NetBSD.
 * Define struct_ElfW_Phdr_sz, detected missing symbol by msan.
 * Change type of __sanitizer_FILE from void to char. This helps
   to reuse this type as an array. Long term it will be properly
   implemented along with SANITIZER_HAS_STRUCT_FILE setting to 1.
 * Add initial NetBSD support in lib/tsan/go/buildgo.sh.
 * Correct referencing stdout and stderr in tsan_interceptors.cc
   on NetBSD.
 * Document NetBSD x86_64 specific virtual memory layout in
   tsan_platform.h.
 * Port tests/rtl/tsan_test_util_posix.cc to NetBSD.
 * Enable NetBSD tests in test/msan/lit.cfg.
 * Enable NetBSD tests in test/tsan/lit.cfg.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, eugenis, kcc, dvyukov

Reviewed By: dvyukov

Subscribers: #sanitizers, llvm-commits, kubamracek

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D39124

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@316591 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/sanitizer_common/sanitizer_common_interceptors.inc b/lib/sanitizer_common/sanitizer_common_interceptors.inc
index 21a405ae4..321126c10 100644
--- a/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -4405,7 +4405,7 @@ INTERCEPTOR(char *, tempnam, char *dir, char *pfx) {
 #define INIT_TEMPNAM
 #endif
 
-#if SANITIZER_INTERCEPT_PTHREAD_SETNAME_NP
+#if SANITIZER_INTERCEPT_PTHREAD_SETNAME_NP && !SANITIZER_NETBSD
 INTERCEPTOR(int, pthread_setname_np, uptr thread, const char *name) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, pthread_setname_np, thread, name);
@@ -4414,6 +4414,17 @@ INTERCEPTOR(int, pthread_setname_np, uptr thread, const char *name) {
   return REAL(pthread_setname_np)(thread, name);
 }
 #define INIT_PTHREAD_SETNAME_NP COMMON_INTERCEPT_FUNCTION(pthread_setname_np);
+#elif SANITIZER_INTERCEPT_PTHREAD_SETNAME_NP && SANITIZER_NETBSD
+INTERCEPTOR(int, pthread_setname_np, uptr thread, const char *name, void *arg) {
+  void *ctx;
+  char newname[32]; // PTHREAD_MAX_NAMELEN_NP=32
+  COMMON_INTERCEPTOR_ENTER(ctx, pthread_setname_np, thread, name, arg);
+  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
+  internal_snprintf(newname, sizeof(newname), name, arg);
+  COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, newname);
+  return REAL(pthread_setname_np)(thread, name, arg);
+}
+#define INIT_PTHREAD_SETNAME_NP COMMON_INTERCEPT_FUNCTION(pthread_setname_np);
 #else
 #define INIT_PTHREAD_SETNAME_NP
 #endif