Implement shared libraries logging on Mac OS X, added required support in Tick Processor.

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 880931e048b3a9a8a417b6441fbadea6995d75cc..5e444b6ce465f526a080366faf64ef257fe02fde 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -32,6 +32,8 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <mach/mach_init.h>
+#include <mach-o/dyld.h>
+#include <mach-o/getsect.h>
 
 #include <AvailabilityMacros.h>
 
@@ -205,7 +207,18 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 
 
 void OS::LogSharedLibraryAddresses() {
-  // TODO(1233579): Implement.
+  unsigned int images_count = _dyld_image_count();
+  for (unsigned int i = 0; i < images_count; ++i) {
+    const mach_header *header = _dyld_get_image_header(i);

[iposva, 2009/07/13 20:18:21]

The correct style is "mach_header* header".

[Mikhail Naganov, 2009/07/14 05:00:42]

Done.

+    if (header == NULL) continue;
+    unsigned int size;
+    char *code_ptr;

[iposva, 2009/07/13 20:18:21]

The correct style is "char* code_ptr".

I also assume that you did not assign at the declaration because that would have
run over the line length?

[Mikhail Naganov, 2009/07/14 05:00:42]

No, it's just a lack of attention. Fixed, thanks!

+    code_ptr = getsectdatafromheader(header, SEG_TEXT, SECT_TEXT, &size);
+    if (code_ptr == NULL) continue;
+    const uintptr_t slide = _dyld_get_image_vmaddr_slide(i);
+    const uintptr_t start = reinterpret_cast<uintptr_t>(code_ptr) + slide;
+    LOG(SharedLibraryEvent(_dyld_get_image_name(i), start, start + size));
+  }
 }