commit 7b0af7ad82fcf88e800d1a553d81fda29dc064bd
author Elliott Hughes <enh@google.com> Fri Sep 15 16:09:22 2017 -0700
committer Elliott Hughes <enh@google.com> Fri Sep 15 16:18:49 2017 -0700
tree 4cf982c55c48b49864bcb4f986c7400d640930e0
parent 3b64f8ecb3db49574cc5b7c6030be98c159be4d4

Always log errno when aborting.

(Where errno is relevant.)

Also consistently use -1 as the fd for anonymous mmaps. (It doesn't matter,
but it's more common, and potentially more intention-revealing.)

Bug: http://b/65608572
Test: ran tests
Change-Id: Ie9a207632d8242f42086ba3ca862519014c3c102

linker/linker_block_allocator.cpp

diff --git a/linker/linker_block_allocator.cpp b/linker/linker_block_allocator.cpp
index 605e185..abb1ebd 100644
--- a/linker/linker_block_allocator.cpp
+++ b/linker/linker_block_allocator.cpp
@@ -117,7 +117,7 @@
                 "Invalid sizeof(LinkerBlockAllocatorPage)");
 
   LinkerBlockAllocatorPage* page = reinterpret_cast<LinkerBlockAllocatorPage*>(
-      mmap(nullptr, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0));
+      mmap(nullptr, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0));
 
   if (page == MAP_FAILED) {
     abort(); // oom