[PATCH] D46465: [asan] Port asan_malloc_linux.cc to RTEMS

[Walter Lee via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL331649: [asan] Port asan_malloc_linux.cc to RTEMS (authored by waltl, committed by ).
Herald added a subscriber: delcypher.

Changed prior to commit:
  https://reviews.llvm.org/D46465?vs=145282&id=145490#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D46465

Files:
  compiler-rt/trunk/lib/asan/asan_malloc_linux.cc


Index: compiler-rt/trunk/lib/asan/asan_malloc_linux.cc
===================================================================
--- compiler-rt/trunk/lib/asan/asan_malloc_linux.cc
+++ compiler-rt/trunk/lib/asan/asan_malloc_linux.cc
@@ -16,7 +16,7 @@
 
 #include "sanitizer_common/sanitizer_platform.h"
 #if SANITIZER_FREEBSD || SANITIZER_FUCHSIA || SANITIZER_LINUX || \
-    SANITIZER_NETBSD || SANITIZER_SOLARIS
+    SANITIZER_NETBSD || SANITIZER_RTEMS || SANITIZER_SOLARIS
 
 #include "sanitizer_common/sanitizer_tls_get_addr.h"
 #include "asan_allocator.h"
@@ -28,7 +28,7 @@
 using namespace __asan;  // NOLINT
 
 static uptr allocated_for_dlsym;
-static const uptr kDlsymAllocPoolSize = 1024;
+static const uptr kDlsymAllocPoolSize = SANITIZER_RTEMS ? 4096 : 1024;
 static uptr alloc_memory_for_dlsym[kDlsymAllocPoolSize];
 
 static INLINE bool IsInDlsymAllocPool(const void *ptr) {
@@ -44,16 +44,26 @@
   return mem;
 }
 
+// On RTEMS, we use the local pool to handle memory allocation before
+// the ASan run-time has been initialized.
+static INLINE bool EarlyMalloc() {
+  return SANITIZER_RTEMS && (!asan_inited || asan_init_is_running);
+}
+
 static INLINE bool MaybeInDlsym() {
   // Fuchsia doesn't use dlsym-based interceptors.
   return !SANITIZER_FUCHSIA && asan_init_is_running;
 }
 
+static INLINE bool UseLocalPool() {
+  return EarlyMalloc() || MaybeInDlsym();
+}
+
 static void *ReallocFromLocalPool(void *ptr, uptr size) {
   const uptr offset = (uptr)ptr - (uptr)alloc_memory_for_dlsym;
   const uptr copy_size = Min(size, kDlsymAllocPoolSize - offset);
   void *new_ptr;
-  if (UNLIKELY(MaybeInDlsym())) {
+  if (UNLIKELY(UseLocalPool())) {
     new_ptr = AllocateFromLocalPool(size);
   } else {
     ENSURE_ASAN_INITED();
@@ -81,16 +91,16 @@
 #endif // SANITIZER_INTERCEPT_CFREE
 
 INTERCEPTOR(void*, malloc, uptr size) {
-  if (UNLIKELY(MaybeInDlsym()))
+  if (UNLIKELY(UseLocalPool()))
     // Hack: dlsym calls malloc before REAL(malloc) is retrieved from dlsym.
     return AllocateFromLocalPool(size);
   ENSURE_ASAN_INITED();
   GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
 INTERCEPTOR(void*, calloc, uptr nmemb, uptr size) {
-  if (UNLIKELY(MaybeInDlsym()))
+  if (UNLIKELY(UseLocalPool()))
     // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
     return AllocateFromLocalPool(nmemb * size);
   ENSURE_ASAN_INITED();
@@ -101,7 +111,7 @@
 INTERCEPTOR(void*, realloc, void *ptr, uptr size) {
   if (UNLIKELY(IsInDlsymAllocPool(ptr)))
     return ReallocFromLocalPool(ptr, size);
-  if (UNLIKELY(MaybeInDlsym()))
+  if (UNLIKELY(UseLocalPool()))
     return AllocateFromLocalPool(size);
   ENSURE_ASAN_INITED();
   GET_STACK_TRACE_MALLOC;


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D46465.145490.patch
Type: text/x-patch
Size: 2711 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20180507/a0dafc01/attachment.bin>