[PATCH] D33784: Bug 33206 - Sanitizer CHECK failed: ((allocated_for_dlsym)) < ((kDlsymAllocPoolSize)) (1036, 1024)) with preload

[Denis Khalikov via Phabricator via llvm-commits]

denis13 updated this revision to Diff 101539.
denis13 added a comment.

Updated realloc interceptor to trigger initialization of asan interceptors if ptr in the local pool.


https://reviews.llvm.org/D33784

Files:
  lib/asan/asan_malloc_linux.cc


Index: lib/asan/asan_malloc_linux.cc
===================================================================
--- lib/asan/asan_malloc_linux.cc
+++ lib/asan/asan_malloc_linux.cc
@@ -60,17 +60,21 @@
 #endif // SANITIZER_INTERCEPT_CFREE
 
 INTERCEPTOR(void*, malloc, uptr size) {
-  if (UNLIKELY(!asan_inited))
-    // Hack: dlsym calls malloc before REAL(malloc) is retrieved from dlsym.
+  if (UNLIKELY(asan_init_is_running))
+    // Hack: dlsym calls malloc before REAL(malloc) is retrieved from dlsym
     return AllocateFromLocalPool(size);
+  if (UNLIKELY(!asan_inited))
+    AsanInitFromRtl();
   GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
 INTERCEPTOR(void*, calloc, uptr nmemb, uptr size) {
-  if (UNLIKELY(!asan_inited))
+  if (UNLIKELY(asan_init_is_running))
     // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
     return AllocateFromLocalPool(nmemb * size);
+  if (UNLIKELY(!asan_inited))
+    AsanInitFromRtl();
   GET_STACK_TRACE_MALLOC;
   return asan_calloc(nmemb, size, &stack);
 }
@@ -78,18 +82,21 @@
 INTERCEPTOR(void*, realloc, void *ptr, uptr size) {
   GET_STACK_TRACE_MALLOC;
   if (UNLIKELY(IsInDlsymAllocPool(ptr))) {
-    uptr offset = (uptr)ptr - (uptr)alloc_memory_for_dlsym;
-    uptr copy_size = Min(size, kDlsymAllocPoolSize - offset);
+    const uptr offset = (uptr)ptr - (uptr)alloc_memory_for_dlsym;
+    const uptr copy_size = Min(size, kDlsymAllocPoolSize - offset);
     void *new_ptr;
-    if (UNLIKELY(!asan_inited)) {
+    if (UNLIKELY(asan_init_is_running)) {
       new_ptr = AllocateFromLocalPool(size);
     } else {
-      copy_size = size;
-      new_ptr = asan_malloc(copy_size, &stack);
+      if (UNLIKELY(!asan_inited))
+        AsanInitFromRtl();
+      new_ptr = asan_malloc(size, &stack);
     }
     internal_memcpy(new_ptr, ptr, copy_size);
     return new_ptr;
   }
+  if (UNLIKELY(!asan_inited))
+    AsanInitFromRtl();
   return asan_realloc(ptr, size, &stack);
 }
 


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