Changeset 43087 in webkit for trunk/JavaScriptCore/bytecode/SamplingTool.cpp

Timestamp:

Apr 30, 2009, 2:02:19 PM (16 years ago)

Author:

[email protected]

Message:

2009-04-30 Gavin Barraclough <​[email protected]>

Reviewed by Oliver Hunt.

Two quick improvements to SamplingFlags mechanism.

SamplingFlags::ScopedFlag class to provide support for automagically
clearing a flag as it goes out of scope, and add a little more detail
to the output generated by the tool.

• bytecode/SamplingTool.cpp: (JSC::SamplingFlags::stop):
• bytecode/SamplingTool.h: (JSC::SamplingFlags::ScopedFlag::ScopedFlag): (JSC::SamplingFlags::ScopedFlag::~ScopedFlag):

File:

• trunk/JavaScriptCore/bytecode/SamplingTool.cpp (modified) (1 diff)

trunk/JavaScriptCore/bytecode/SamplingTool.cpp

@@ -67 +67 @@
         total += s_flagCounts[i];
 
-    printf("SamplingFlags: sample count with flags set:\n");
-    for (unsigned i = 0; i <= 32; ++i)
-        printf("  [ %02d ] : %lld\t\t(%03.2f%%)\n", i, s_flagCounts[i], (100.0 * s_flagCounts[i]) / total);
-    printf("\n\n");
+    if (total) {
+        printf("\nSamplingFlags: sample counts with flags set: (%lld total)\n", total);
+        for (unsigned i = 0; i <= 32; ++i) {
+            if (s_flagCounts[i])
+                printf("  [ %02d ] : %lld\t\t(%03.2f%%)\n", i, s_flagCounts[i], (100.0 * s_flagCounts[i]) / total);
+        }
+        printf("\n");
+    } else
+    printf("\nSamplingFlags: no samples.\n\n");
 }
 uint64_t SamplingFlags::s_flagCounts[33];