Incorporate patches by Paolo Giarrusso to allow profiling

C++ functions in shared libraries, building in directories
containing spaces, and using named constants better.
Review URL: http://codereview.chromium.org/7864

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@550 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/SConscript

@@ -109,7 +109,7 @@ def ConfigureObjectFiles():
   env.Replace(**context.flags['v8'])
   context.ApplyEnvOverrides(env)
   env['BUILDERS']['JS2C'] = Builder(action=js2c.JS2C)
-  env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile $LOGFILE')
+  env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile "$LOGFILE"')
 
   # Build the standard platform-independent source files.
   source_files = context.GetRelevantSources(SOURCES)

src/objects-inl.h

@@ -1160,7 +1160,7 @@ void DescriptorArray::Swap(int first, int second) {
 
 
 bool Dictionary::requires_slow_elements() {
-  Object* max_index_object = get(kPrefixStartIndex);
+  Object* max_index_object = get(kMaxNumberKeyIndex);
   if (!max_index_object->IsSmi()) return false;
   return 0 !=
       (Smi::cast(max_index_object)->value() & kRequiresSlowElementsMask);
@@ -1169,7 +1169,7 @@ bool Dictionary::requires_slow_elements() {
 
 uint32_t Dictionary::max_number_key() {
   ASSERT(!requires_slow_elements());
-  Object* max_index_object = get(kPrefixStartIndex);
+  Object* max_index_object = get(kMaxNumberKeyIndex);
   if (!max_index_object->IsSmi()) return 0;
   uint32_t value = static_cast<uint32_t>(Smi::cast(max_index_object)->value());
   return value >> kRequiresSlowElementsTagSize;

src/objects.cc

@@ -3924,7 +3924,10 @@ bool String::SlowAsArrayIndex(uint32_t* index) {
 
 
 static inline uint32_t HashField(uint32_t hash, bool is_array_index) {
-  return (hash << String::kLongLengthShift) | (is_array_index ? 3 : 1);
+  uint32_t result =
+      (hash << String::kLongLengthShift) | String::kHashComputedMask;
+  if (is_array_index) result |= String::kIsArrayIndexMask;
+  return result;
 }
 
 
@@ -6067,13 +6070,13 @@ void Dictionary::UpdateMaxNumberKey(uint32_t key) {
   // Check if this index is high enough that we should require slow
   // elements.
   if (key > kRequiresSlowElementsLimit) {
-    set(kPrefixStartIndex, Smi::FromInt(kRequiresSlowElementsMask));
+    set(kMaxNumberKeyIndex, Smi::FromInt(kRequiresSlowElementsMask));
     return;
   }
   // Update max key value.
-  Object* max_index_object = get(kPrefixStartIndex);
+  Object* max_index_object = get(kMaxNumberKeyIndex);
   if (!max_index_object->IsSmi() || max_number_key() < key) {
-    set(kPrefixStartIndex, Smi::FromInt(key << kRequiresSlowElementsTagSize));
+    set(kMaxNumberKeyIndex, Smi::FromInt(key << kRequiresSlowElementsTagSize));
   }
 }
 

src/objects.h

@@ -1966,11 +1966,11 @@ class Dictionary: public DictionaryBase {
 
   // Accessors for next enumeration index.
   void SetNextEnumerationIndex(int index) {
-    fast_set(this, kNextEnumnerationIndexIndex, Smi::FromInt(index));
+    fast_set(this, kNextEnumerationIndexIndex, Smi::FromInt(index));
   }
 
   int NextEnumerationIndex() {
-    return Smi::cast(get(kNextEnumnerationIndexIndex))->value();
+    return Smi::cast(get(kNextEnumerationIndexIndex))->value();
   }
 
   // Returns a new array for dictionary usage. Might return Failure.
@@ -2014,7 +2014,7 @@ class Dictionary: public DictionaryBase {
   Object* GenerateNewEnumerationIndices();
 
   static const int kMaxNumberKeyIndex = kPrefixStartIndex;
-  static const int kNextEnumnerationIndexIndex = kMaxNumberKeyIndex + 1;
+  static const int kNextEnumerationIndexIndex = kMaxNumberKeyIndex + 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Dictionary);
 };

tools/linux-tick-processor.py

@@ -30,13 +30,18 @@
 # Usage: process-ticks.py <logfile>
 # Where <logfile> is the log file name (eg, v8.log).
 
-import os, re, sys, tickprocessor, getopt;
+import subprocess, re, sys, tickprocessor, getopt
 
 class LinuxTickProcessor(tickprocessor.TickProcessor):
 
   def ParseVMSymbols(self, filename, start, end):
     """Extract symbols and add them to the cpp entries."""
-    pipe = os.popen('nm -n %s | c++filt' % filename, 'r')
+    # Extra both dynamic and non-dynamic symbols.
+    command = 'nm -C -n "%s"; nm -C -n -D "%s"' % (filename, filename)
+    process = subprocess.Popen(command, shell=True,
+                               stdout=subprocess.PIPE,
+                               stderr=subprocess.STDOUT)
+    pipe = process.stdout
     try:
       for line in pipe:
         row = re.match('^([0-9a-fA-F]{8}) . (.*)$', line)