GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/allocator/allocator_shim.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/allocator/allocator_shim.h"
 
 #include <errno.h>
 
 #include <new>
 
@@ skipping 274 matching lines @@
 }
 
 ALWAYS_INLINE void ShimFreeDefiniteSize(void* ptr, size_t size, void* context) {
   const allocator::AllocatorDispatch* const chain_head = GetChainHead();
   return chain_head->free_definite_size_function(chain_head, ptr, size,
                                                  context);
 }
 
 }  // extern "C"
 
-#if !defined(OS_WIN) && !defined(OS_MACOSX)
+#if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(OS_AIX)
 // Cpp symbols (new / delete) should always be routed through the shim layer
 // except on Windows and macOS where the malloc intercept is deep enough that it
 // also catches the cpp calls.
+// This currently can't be done on AIX based on how
+// allocator_shim_default_dispatch_to_glibc.cc is set up.
 #include "base/allocator/allocator_shim_override_cpp_symbols.h"
 #endif
 
 #if defined(OS_ANDROID)
 // Android does not support symbol interposition. The way malloc symbols are
 // intercepted on Android is by using link-time -wrap flags.
 #include "base/allocator/allocator_shim_override_linker_wrapped_symbols.h"
 #elif defined(OS_WIN)
 // On Windows we use plain link-time overriding of the CRT symbols.
 #include "base/allocator/allocator_shim_override_ucrt_symbols_win.h"
@@ skipping 32 matching lines @@
 // Cross-checks.
 
 #if defined(MEMORY_TOOL_REPLACES_ALLOCATOR)
 #error The allocator shim should not be compiled when building for memory tools.
 #endif
 
 #if (defined(__GNUC__) && defined(__EXCEPTIONS)) || \
     (defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS)
 #error This code cannot be used when exceptions are turned on.
 #endif