1 files changed, 132 insertions, 0 deletions
diff --git a/tools/profiler/core/shared-libraries-macos.cc b/tools/profiler/core/shared-libraries-macos.cc
new file mode 100644
index 000000000..e218d2280
--- /dev/null
+++ b/tools/profiler/core/shared-libraries-macos.cc
@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <AvailabilityMacros.h>
+#include <mach-o/loader.h>
+#include <mach-o/dyld_images.h>
+#include <mach/task_info.h>
+#include <mach/task.h>
+#include <mach/mach_init.h>
+#include <mach/mach_traps.h>
+#include <string.h>
+#include <stdlib.h>
+#include <vector>
+#include <sstream>
+
+#include "shared-libraries.h"
+
+#ifndef MAC_OS_X_VERSION_10_6
+#define MAC_OS_X_VERSION_10_6 1060
+#endif
+
+#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
+// borrowed from Breakpad
+// Fallback declarations for TASK_DYLD_INFO and friends, introduced in
+// <mach/task_info.h> in the Mac OS X 10.6 SDK.
+#define TASK_DYLD_INFO 17
+struct task_dyld_info {
+    mach_vm_address_t all_image_info_addr;
+    mach_vm_size_t all_image_info_size;
+  };
+typedef struct task_dyld_info task_dyld_info_data_t;
+typedef struct task_dyld_info *task_dyld_info_t;
+#define TASK_DYLD_INFO_COUNT (sizeof(task_dyld_info_data_t) / sizeof(natural_t))
+
+#endif
+
+// Architecture specific abstraction.
+#ifdef __i386__
+typedef mach_header platform_mach_header;
+typedef segment_command mach_segment_command_type;
+#define MACHO_MAGIC_NUMBER MH_MAGIC
+#define CMD_SEGMENT LC_SEGMENT
+#define seg_size uint32_t
+#else
+typedef mach_header_64 platform_mach_header;
+typedef segment_command_64 mach_segment_command_type;
+#define MACHO_MAGIC_NUMBER MH_MAGIC_64
+#define CMD_SEGMENT LC_SEGMENT_64
+#define seg_size uint64_t
+#endif
+
+static
+void addSharedLibrary(const platform_mach_header* header, char *name, SharedLibraryInfo &info) {
+  const struct load_command *cmd =
+    reinterpret_cast<const struct load_command *>(header + 1);
+
+  seg_size size = 0;
+  unsigned long long start = reinterpret_cast<unsigned long long>(header);
+  // Find the cmd segment in the macho image. It will contain the offset we care about.
+  const uint8_t *uuid_bytes = nullptr;
+  for (unsigned int i = 0;
+       cmd && (i < header->ncmds) && (uuid_bytes == nullptr || size == 0);
+       ++i) {
+    if (cmd->cmd == CMD_SEGMENT) {
+      const mach_segment_command_type *seg =
+        reinterpret_cast<const mach_segment_command_type *>(cmd);
+
+      if (!strcmp(seg->segname, "__TEXT")) {
+        size = seg->vmsize;
+      }
+    } else if (cmd->cmd == LC_UUID) {
+      const uuid_command *ucmd = reinterpret_cast<const uuid_command *>(cmd);
+      uuid_bytes = ucmd->uuid;
+    }
+
+    cmd = reinterpret_cast<const struct load_command *>
+      (reinterpret_cast<const char *>(cmd) + cmd->cmdsize);
+  }
+
+  std::stringstream uuid;
+  uuid << std::hex << std::uppercase;
+  if (uuid_bytes != nullptr) {
+    for (int i = 0; i < 16; ++i) {
+      uuid << ((uuid_bytes[i] & 0xf0) >> 4);
+      uuid << (uuid_bytes[i] & 0xf);
+    }
+    uuid << '0';
+  }
+
+  info.AddSharedLibrary(SharedLibrary(start, start + size, 0, uuid.str(),
+                                      name));
+}
+
+// Use dyld to inspect the macho image information. We can build the SharedLibraryEntry structure
+// giving us roughtly the same info as /proc/PID/maps in Linux.
+SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf()
+{
+  SharedLibraryInfo sharedLibraryInfo;
+
+  task_dyld_info_data_t task_dyld_info;
+  mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
+  if (task_info(mach_task_self (), TASK_DYLD_INFO, (task_info_t)&task_dyld_info,
+                &count) != KERN_SUCCESS) {
+    return sharedLibraryInfo;
+  }
+
+  struct dyld_all_image_infos* aii = (struct dyld_all_image_infos*)task_dyld_info.all_image_info_addr;
+  size_t infoCount = aii->infoArrayCount;
+
+  // Iterate through all dyld images (loaded libraries) to get their names
+  // and offests.
+  for (size_t i = 0; i < infoCount; ++i) {
+    const dyld_image_info *info = &aii->infoArray[i];
+
+    // If the magic number doesn't match then go no further
+    // since we're not pointing to where we think we are.
+    if (info->imageLoadAddress->magic != MACHO_MAGIC_NUMBER) {
+      continue;
+    }
+
+    const platform_mach_header* header =
+      reinterpret_cast<const platform_mach_header*>(info->imageLoadAddress);
+
+    // Add the entry for this image.
+    addSharedLibrary(header, (char*)info->imageFilePath, sharedLibraryInfo);
+
+  }
+  return sharedLibraryInfo;
+}
+