Remove unused support for SysV shared memory

src/trusted/platform_qualify/linux/sysv_shm_and_mmap.c

-/*
- * Copyright (c) 2011 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * This test verifies that SysV shared memory, created via shmget and
- * mapped via shmat, can be mmap'd over in parts.
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <sys/mman.h>
-
-#include "native_client/src/trusted/platform_qualify/linux/sysv_shm_and_mmap.h"
-
-#define SYSVSHM_SIZE  65536
-#define MMAP_OFFSET   4096
-#define MMAP_SIZE     4096
-
-#ifdef DEBUG_SHM_AND_MMAP
-# define DPRINTF(arglist) do { printf arglist; } while (0)
-#else
-# define DPRINTF(arglist) do { ; } while (0)
-#endif
-
-static void FillWithPattern(void   *memory,
-                            size_t size,
-                            int    counter) {
-  unsigned char *mem_ptr = (unsigned char *) memory;
-  size_t        ix;
-
-  for (ix = 0; ix < size; ++ix) {
-    mem_ptr[ix] = counter;
-    ++counter;
-    counter &= 0xff;
-  }
-}
-
-static int VerifyPattern(void   *memory,
-                         size_t size,
-                         int    counter) {
-  unsigned char *mem_ptr = (unsigned char *) memory;
-  size_t        ix;
-
-  for (ix = 0; ix < size; ++ix) {
-    if (mem_ptr[ix] != counter) {
-      fprintf(stderr,
-              "Memory at %p is wrong: expected %d, got %d\n",
-              mem_ptr + ix,
-              counter,
-              mem_ptr[ix]);
-      return 0;
-    }
-    ++counter;
-    counter &= 0xff;
-  }
-  return 1;
-}
-
-
-/*
- * Verify the allocated shared memory ID.
- */
-int NaClPlatformQualifySysVShmId(int shm_id) {
-  void            *shm_addr;
-  void            *shm_addr2;
-  void            *mmap_addr;
-  struct shmid_ds shm_ds;
-
-  shm_addr = shmat(shm_id, (const void *) NULL, 0);
-  DPRINTF(("shmat -> %p\n", shm_addr));
-  if (NULL == shm_addr) {
-    perror("platform_qualify: sysv_shm_and_mmap: shmat");
-    return 2;
-  }
-
-  FillWithPattern(shm_addr, SYSVSHM_SIZE, 0);
-
-  if (-1 == shmctl(shm_id, IPC_STAT, &shm_ds)) {
-    perror("platform_qualify: sysv_shm_and_mmap: no shmctl IPC_STAT\n");
-    return 3;
-  }
-  if (1 != shm_ds.shm_nattch) {
-    fprintf(stderr,
-            "platform_qualify: sysv_shm_and_mmap: shm_nattch (%lu) != 1\n",
-            (unsigned long) shm_ds.shm_nattch);
-    return 4;
-  }
-
-  mmap_addr = (void *) ((uintptr_t) shm_addr + MMAP_OFFSET);
-  DPRINTF(("mmap addr %p\n", mmap_addr));
-  if (MAP_FAILED == mmap(mmap_addr,
-                         MMAP_SIZE,
-                         PROT_READ | PROT_WRITE,
-                         MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
-                         -1,
-                         0)) {
-    perror("platform_qualify: sysv_shm_and_mmap: mmap");
-    return 5;
-  }
-  DPRINTF(("mmap succeeded\n"));
-  /*
-   * Splitting an shmat mapping will increase the shm_nattch count by 1.
-   */
-
-  if (-1 == shmctl(shm_id, IPC_STAT, &shm_ds)) {
-    perror("platform_qualify: sysv_shm_and_mmap: no shmctl IPC_STAT\n");
-    return 6;
-  }
-  if (2 != shm_ds.shm_nattch) {
-    fprintf(stderr,
-            "platform_qualify: sysv_shm_and_mmap: shm_nattch (%lu) != 2\n",
-           (unsigned long) shm_ds.shm_nattch);
-    return 7;
-  }
-
-  FillWithPattern(mmap_addr, MMAP_SIZE, 1);
-
-  shm_addr2 = shmat(shm_id, (const void *) NULL, 0);
-  DPRINTF(("shmat -> %p\n", shm_addr2));
-  if (NULL == shm_addr2) {
-    perror("platform_qualify: sysv_shm_and_mmap: shmat 2nd time\n");
-    return 8;
-  }
-
-  if (-1 == shmctl(shm_id, IPC_STAT, &shm_ds)) {
-    perror("platform_qualify: sysv_shm_and_mmap: no shmctl IPC_STAT\n");
-    return 9;
-  }
-  if (3 != shm_ds.shm_nattch) {
-    fprintf(stderr,
-            "platform_qualify: sysv_shm_and_mmap: shm_nattch (%lu) != 3\n",
-           (unsigned long) shm_ds.shm_nattch);
-    return 10;
-  }
-
-  if (!VerifyPattern(shm_addr2, SYSVSHM_SIZE, 0)) {
-    fprintf(stderr,
-            "platform_qualify: writing to mmap memory overwrote"
-            " sysv shm memory?!?\n");
-    return 11;
-  }
-  FillWithPattern(shm_addr2, SYSVSHM_SIZE, 0);
-  if (!VerifyPattern(mmap_addr, MMAP_SIZE, 1)) {
-    fprintf(stderr,
-            "platform_qualify: writng to shm memory"
-            " overwrite mmap memory?!?\n");
-    return 12;
-  }
-  if (MAP_FAILED == mmap(shm_addr,
-                         SYSVSHM_SIZE,
-                         PROT_READ | PROT_WRITE,
-                         MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
-                         -1,
-                         0)) {
-    perror("platform_qualify: sysv_shm_and_mmap: mmap over all"
-           " shm_addr failed\n");
-    return 13;
-  }
-
-  if (-1 == shmctl(shm_id, IPC_STAT, &shm_ds)) {
-    perror("platform_qualify: sysv_shm_and_mmap: no shmctl IPC_STAT\n");
-    return 14;
-  }
-  if (1 != shm_ds.shm_nattch) {
-    fprintf(stderr,
-            "platform_qualify: sysv_shm_and_mmap: shm_nattch (%lu) != 1\n",
-           (unsigned long) shm_ds.shm_nattch);
-    return 15;
-  }
-
-  if (MAP_FAILED == mmap(shm_addr2,
-                         SYSVSHM_SIZE,
-                         PROT_READ | PROT_WRITE,
-                         MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
-                         -1,
-                         0)) {
-    perror("platform_qualify: sysv_shm_and_mmap: mmap over all"
-           " shm_addr2 failed\n");
-    return 16;
-  }
-  if (-1 == shmctl(shm_id, IPC_STAT, &shm_ds)) {
-    perror("platform_qualify: sysv_shm_and_mmap: no shmctl IPC_STAT\n");
-    return 17;
-  }
-  if (0 != shm_ds.shm_nattch) {
-    fprintf(stderr,
-            "platform_qualify: sysv_shm_and_mmap: over-mmap'd shm does not"
-            " reduce shm_nattch (%lu)\n",
-            (unsigned long) shm_ds.shm_nattch);
-    return 18;
-  }
-
-  return 0;
- }
-
-/*
- * If this code is interrupted or for some reason segvs, then the
- * shared memory is leaked.  In that case, use "ipcs -m" to look for
- * segments with key of 0 and bytes of 65536, and then use "ipcrm -m
- * shmid" for the corresponding shmid number to garbage collect the
- * shared memory segment.
- */
-
-
-/*
- * To build as a standalone, build with -DSysVShmAndMmapHasProblems=main.
- */
-int NaClPlatformQualifySysVShmAndMmapHasProblems(void) {
-  int err_code = 0;
-  int shm_id = -1;
-
-  shm_id = shmget(IPC_PRIVATE,
-                  SYSVSHM_SIZE,
-                  IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);
-  DPRINTF(("shmget -> %d\n", shm_id));
-
-  if (-1 == shm_id) {
-    perror("platform_qualify: sysv_shm_and_mmap: shmget");
-    return 1;
-  }
-
-  err_code = NaClPlatformQualifySysVShmId(shm_id);
-
-  if (-1 == shmctl(shm_id, IPC_RMID, NULL)) {
-    perror("platform_qualify: sysv_shm_and_mmap: shmctl IPC_RMID failed\n");
-
-    /*
-     * Set the err code to a release failure only if we do not already have
-     * a more interesting failure to report.
-     */
-    if (!err_code) err_code = 19;
-  }
-
-  return err_code;
-}