Relanding "Multiprocess test client: Android child process launcher rework."

base/debug/proc_maps_linux_unittest.cc

 // Copyright (c) 2013 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 <stddef.h>
 #include <stdint.h>
 
 #include "base/debug/proc_maps_linux.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
@@ skipping 209 matching lines @@
     // if the program was currently executing on a different stack.
     //
     // Starting in 3.4, the kernel will print out the vma containing the current
     // stack pointer as [stack:TID] as long as that vma does not lie within
     // mm->start_stack.
     //
     // Because this has gotten too complicated and brittle of a test, completely
     // ignore checking for the stack and address when running under Valgrind.
     // See http://crbug.com/431702 for more details.
     if (!RunningOnValgrind() && regions[i].path == "[stack]") {
+// On Android the test is run on a background thread, since [stack] is for
+// the main thread, we cannot test this.
+#if !defined(OS_ANDROID)
       EXPECT_GE(address, regions[i].start);
       EXPECT_LT(address, regions[i].end);
+#endif
       EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::READ);
       EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::WRITE);
       EXPECT_FALSE(regions[i].permissions & MappedMemoryRegion::EXECUTE);
       EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::PRIVATE);
       EXPECT_FALSE(found_stack) << "Found duplicate stacks";
       found_stack = true;
     }
 
     if (address >= regions[i].start && address < regions[i].end) {
       EXPECT_FALSE(found_address) << "Found same address in multiple regions";
@@ skipping 92 matching lines @@
   EXPECT_EQ(5ULL, regions.size());
   EXPECT_EQ("/bin/cat", regions[0].path);
   EXPECT_EQ("/lib/x86_64-linux-gnu/libc-2.15.so", regions[1].path);
   EXPECT_EQ("/lib/x86_64-linux-gnu/ld-2.15.so", regions[2].path);
   EXPECT_EQ("\"vd so\"", regions[3].path);
   EXPECT_EQ("[vsys call]", regions[4].path);
 }
 
 }  // namespace debug
 }  // namespace base