EventTracingPriv.cpp File Reference

#include "tools/trace/EventTracingPriv.h"
#include "include/utils/SkEventTracer.h"
#include "src/core/SkATrace.h"
#include "src/core/SkTraceEvent.h"
#include "tools/flags/CommandLineFlags.h"
#include "tools/trace/ChromeTracingTracer.h"
#include "tools/trace/SkDebugfTracer.h"

Go to the source code of this file.

Functions
static	DEFINE_string (trace, "", "Log trace events in one of several modes:\n" " debugf : Show events using SkDebugf\n" " atrace : Send events to Android ATrace\n" " perfetto : Send events to Perfetto (Linux, Android, and Mac only)\n" " <filename> : Any other string is interpreted as a filename. Writes\n" " trace events to specified file as JSON, for viewing\n" " with chrome://tracing")
static	DEFINE_string (traceMatch, "", "Filter which categories are traced.\n" "Uses same format as --match\n")
void	initializeEventTracingForTools (const char *traceFlag)

Function Documentation

DEFINE_string() [1/2]

static DEFINE_string ( trace  , ""  , "Log trace events in one of several modes:\n" " debugf : Show events using SkDebugf\n" " atrace : Send events to Android ATrace\n" " perfetto : Send events to Perfetto (Linux, Android, and Mac only)\n" " <filename> : Any other string is interpreted as a filename. Writes\n" " trace events to specified file as  JSON, for viewing\n" " with chrome://tracing"    )

static

DEFINE_string() [2/2]

static DEFINE_string ( traceMatch  , ""  , "Filter which categories are traced.\n" "Uses same format as --match\n"    )

static

initializeEventTracingForTools()

void initializeEventTracingForTools

(

const char *

mode = nullptr

)

Construct and install an SkEventTracer, based on the mode, defaulting to the –trace command line argument.

Definition at line 44 of file EventTracingPriv.cpp.

                                                           {
    if (!traceFlag) {
        if (FLAGS_trace.isEmpty()) {
            return;
        }
        traceFlag = FLAGS_trace[0];
    }
 
    SkEventTracer* eventTracer = nullptr;
    if (0 == strcmp(traceFlag, "atrace")) {
        eventTracer = new SkATrace();
    } else if (0 == strcmp(traceFlag, "debugf")) {
        eventTracer = new SkDebugfTracer();
    } else if (0 == strcmp(traceFlag, "perfetto")) {
      #if defined(SK_USE_PERFETTO)
          eventTracer = new SkPerfettoTrace();
      #else
          // TODO(b/259248961): update this explanation (and associated docs) as the Perfetto
          // transition progresses.
          SkDebugf("Perfetto is not enabled (SK_USE_PERFETTO is false). Perfetto tracing will not "
                   "be performed.\nTracing tools with Perfetto is only enabled for Linux, Android, "
                   "and Mac.\n");
          return;
      #endif
    }
    else {
        eventTracer = new ChromeTracingTracer(traceFlag);
    }
 
    SkAssertResult(SkEventTracer::SetInstance(eventTracer));
}