Remove unused support for SysV shared memory

src/trusted/service_runtime/mmap_unittest.cc

Index: src/trusted/service_runtime/mmap_unittest.cc
diff --git a/src/trusted/service_runtime/mmap_unittest.cc b/src/trusted/service_runtime/mmap_unittest.cc
index 10f10de878197f782b4278c38b5b02b68aff80bc..471076fb5e9c7ff0f5e54fc308063adfac807a9b 100644
--- a/src/trusted/service_runtime/mmap_unittest.cc
+++ b/src/trusted/service_runtime/mmap_unittest.cc
@@ -16,7 +16,6 @@
 #include "gtest/gtest.h"
 
 #include "native_client/src/include/portability_io.h"
-#include "native_client/src/trusted/desc/linux/nacl_desc_sysv_shm.h"
 #include "native_client/src/trusted/desc/nacl_desc_imc_shm.h"
 #include "native_client/src/trusted/desc/nacl_desc_io.h"
 #include "native_client/src/trusted/desc/nrd_all_modules.h"
@@ -398,51 +397,4 @@ TEST_F(MmapTest, TestProtectAnonymousMemory) {
   NaClAddrSpaceFree(&app);
 }
 
-// NaCl uses SysV shared memory only on Linux, because X Windows
-// depends on it.
-#if NACL_LINUX
-TEST_F(MmapTest, TestSysvShmMapping) {
-  struct NaClApp app;
-  ASSERT_EQ(NaClAppCtor(&app), 1);
-  ASSERT_EQ(NaClAllocAddrSpace(&app), LOAD_OK);
-
-  size_t shm_size = 0x12000;
-  size_t rounded_size = NaClRoundAllocPage(shm_size);
-  ASSERT_EQ(rounded_size, (size_t) 0x20000);
-
-  struct NaClDescSysvShm *shm_desc =
-      (struct NaClDescSysvShm *) malloc(sizeof(*shm_desc));
-  ASSERT_TRUE(NaClDescSysvShmCtor(shm_desc, shm_size));
-  struct NaClDesc *desc = &shm_desc->base;
-  int fd = NaClAppSetDescAvail(&app, desc);
-
-  uintptr_t mapping_addr = 0x200000;
-
-  // First, map something with PROT_READ, so that we can later check
-  // that this is correctly overwritten by PROT_READ|PROT_WRITE and
-  // PROT_NONE mappings.
-  uintptr_t result_addr = (uint32_t) NaClSysMmapIntern(
-      &app, (void *) mapping_addr, shm_size,
-      NACL_ABI_PROT_READ,
-      NACL_ABI_MAP_FIXED | NACL_ABI_MAP_PRIVATE | NACL_ABI_MAP_ANONYMOUS,
-      -1, 0);
-  ASSERT_EQ(result_addr, mapping_addr);
-
-  result_addr = (uint32_t) NaClSysMmapIntern(
-      &app, (void *) mapping_addr, shm_size,
-      NACL_ABI_PROT_READ | NACL_ABI_PROT_WRITE,
-      NACL_ABI_MAP_FIXED | NACL_ABI_MAP_SHARED, fd, 0);
-  ASSERT_EQ(result_addr, mapping_addr);
-  uintptr_t sysaddr = NaClUserToSys(&app, mapping_addr);
-  // We should see two mappings.  The first is the SysV shared memory
-  // segment.  The second is padding upto the 64k page size.
-  CheckMapping(sysaddr, shm_size, PROT_READ | PROT_WRITE, MAP_SHARED);
-  CheckMapping(sysaddr + shm_size, rounded_size - shm_size,
-               PROT_NONE, MAP_PRIVATE);
-
-  NaClDescUnref(desc);
-  NaClAddrSpaceFree(&app);
-}
-#endif
-
 #endif /* NACL_ARCH(NACL_BUILD_ARCH) != NACL_arm */