Add new tarmac-chromejson tool for Chromium's Trace Event Format

doc/index.rst

@@ -512,6 +512,87 @@ If you provide an ELF image via the `--image`_ option, then the output
 will contain the symbolic names of functions in the program. If not,
 then it will contain hex addresses.
 
+tarmac-chromejson
+-----------------
+
+``tarmac-chromejson`` writes out profiling data derived from one or more
+trace files as `Chromium's Trace Event Format`_, suitable for timeline viewers that
+understand this format.
+
+.. _Chromium's Trace Event Format: https://chromium.googlesource.com/catapult/+/HEAD/docs/trace-event-format.md
+
+The command-line syntax of ``tarmac-chromejson`` looks like this:
+  ``tarmac-chromejson`` [ *options* ] *trace-file-name*...
+
+All the options in `Common functionality`_ are supported. This tool
+also recognizes the following additional options:
+
+``-o`` *filename* or ``--output=``\ *filename*
+  Tells the tool to write its output to the specified file, instead of
+  to standard output.
+
+``--pid`` *pid*
+  Tells the tool which Chrome trace process id to assign to generated
+  events. The default is 1.
+
+``--tid`` *tid*
+  Tells the tool which Chrome trace thread id to assign to generated
+  events. The default is 1. If multiple trace files are provided, they
+  are assigned consecutive thread ids starting from this value.
+
+When run over trace files, ``tarmac-chromejson`` produces a JSON object
+whose ``traceEvents`` array contains one complete event for each
+function activation identified in the traces. Each event's timestamp
+and duration come from the Tarmac timestamps used by the index.
+
+An example of the event structure used for complete events is the following:
+
+.. code-block:: none
+
+    {
+      "name": "quicksort",
+      "cat": "function",
+      "ph": "X",
+      "pid": 1,
+      "tid": 2,
+      "ts": 1234,
+      "dur": 56,
+      "args": {
+        "pc": "0x8038",
+        "line": 177
+      }
+    }
+
+while metadata events look like:
+
+.. code-block:: none
+
+    {
+      "ph": "M",
+      "name": "thread_name",
+      "pid": 1,
+      "tid": 2,
+      "args": {
+        "name": "CPU 1"
+      }
+    }
+
+where
+
+* ``name`` is the event name
+* ``cat``  is the Category (e.g. ``"function"``)
+* ``ph`` is the event type (e.g. ``"M"`` or ``"X"``)
+* ``pid`` is the process ID
+* ``tid`` is the Thread ID
+* ``ts`` is the timestamp
+* ``dur`` is the duration of the event
+* ``args`` is arbitrary event-specific metadata
+
+If you provide an ELF image via the `--image`_ option, then the output
+will contain the symbolic names of functions in the program. If more
+than one trace file is provided, the same image is used for all of
+them. If no image is provided, the output will contain hex addresses.
+
 tarmac-vcd
 ----------
 

tests/CMakeLists.txt

@@ -177,6 +177,27 @@ add_test(NAME flamegraph-symbols
       ${CMAKE_BINARY_DIR}/tarmac-flamegraph --index quicksort.tarmac.index --image ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.elf ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.tarmac
   )
 
+# Tests of Chrome trace JSON output on the same quicksort trace.
+# Expected output, with and without symbol annotations from the ELF
+# file, is in chrome-quicksort-*.ref.
+add_test(NAME chrome-no-symbols
+  COMMAND ${test_driver_cmd}
+      --tempfile quicksort.tarmac.index
+      --compare reffile:${CMAKE_CURRENT_SOURCE_DIR}/chrome-quicksort-addr.ref stdout
+      ${CMAKE_BINARY_DIR}/tarmac-chromejson --index quicksort.tarmac.index ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.tarmac
+  )
+add_test(NAME chrome-symbols
+  COMMAND ${test_driver_cmd}
+      --tempfile quicksort.tarmac.index
+      --compare reffile:${CMAKE_CURRENT_SOURCE_DIR}/chrome-quicksort-symbols.ref stdout
+      ${CMAKE_BINARY_DIR}/tarmac-chromejson --index quicksort.tarmac.index --image ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.elf ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.tarmac
+  )
+add_test(NAME chrome-multi-trace-symbols
+  COMMAND ${test_driver_cmd}
+      --compare reffile:${CMAKE_CURRENT_SOURCE_DIR}/chrome-quicksort-multi-symbols.ref stdout
+      ${CMAKE_BINARY_DIR}/tarmac-chrome --image ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.elf ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.tarmac ${CMAKE_CURRENT_SOURCE_DIR}/quicksort.tarmac
+  )
+
 # Tests of tarmac-profile, with and without ELF symbol annotations.
 # Same input trace file as the above tests; expected output is in
 # profile-quicksort-*.ref.

tests/chrome-quicksort-addr.ref

@@ -0,0 +1,35 @@
+{
+  "traceEvents": [
+    {"ph":"M","name":"process_name","pid":1,"tid":1,"args":{"name":"Tarmac trace"}},
+    {"ph":"M","name":"thread_name","pid":1,"tid":1,"args":{"name":"CPU 0"}},
+    {"ph":"X","cat":"function","name":"0x8000","pid":1,"tid":1,"ts":1,"dur":2043,"args":{"pc":"0x8000","line":157}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":10,"dur":2017,"args":{"pc":"0x8038","line":177}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":367,"dur":1401,"args":{"pc":"0x8038","line":860}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":581,"dur":296,"args":{"pc":"0x8038","line":1265}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":656,"dur":76,"args":{"pc":"0x8038","line":1411}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":686,"dur":6,"args":{"pc":"0x8038","line":1472}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":719,"dur":6,"args":{"pc":"0x8038","line":1546}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":781,"dur":89,"args":{"pc":"0x8038","line":1681}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":821,"dur":42,"args":{"pc":"0x8038","line":1762}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":850,"dur":6,"args":{"pc":"0x8038","line":1822}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1050,"dur":520,"args":{"pc":"0x8038","line":2229}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1178,"dur":385,"args":{"pc":"0x8038","line":2478}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1275,"dur":156,"args":{"pc":"0x8038","line":2666}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1337,"dur":87,"args":{"pc":"0x8038","line":2789}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1378,"dur":6,"args":{"pc":"0x8038","line":2871}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1411,"dur":6,"args":{"pc":"0x8038","line":2945}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1480,"dur":76,"args":{"pc":"0x8038","line":3099}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1510,"dur":6,"args":{"pc":"0x8038","line":3160}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1543,"dur":6,"args":{"pc":"0x8038","line":3234}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1616,"dur":6,"args":{"pc":"0x8038","line":3399}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1677,"dur":84,"args":{"pc":"0x8038","line":3526}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1717,"dur":37,"args":{"pc":"0x8038","line":3607}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1741,"dur":6,"args":{"pc":"0x8038","line":3657}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1825,"dur":6,"args":{"pc":"0x8038","line":3843}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1891,"dur":129,"args":{"pc":"0x8038","line":3980}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1927,"dur":6,"args":{"pc":"0x8038","line":4052}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":1971,"dur":42,"args":{"pc":"0x8038","line":4147}},
+    {"ph":"X","cat":"function","name":"0x8038","pid":1,"tid":1,"ts":2000,"dur":6,"args":{"pc":"0x8038","line":4207}},
+    {"ph":"X","cat":"function","name":"0x80ec","pid":1,"tid":1,"ts":2030,"dur":3,"args":{"pc":"0x80ec","line":4290}}
+  ]
+}

tests/chrome-quicksort-multi-symbols.ref

@@ -0,0 +1,65 @@
+{
+  "traceEvents": [
+    {"ph":"M","name":"process_name","pid":1,"tid":1,"args":{"name":"Tarmac trace"}},
+    {"ph":"M","name":"thread_name","pid":1,"tid":1,"args":{"name":"quicksort.tarmac"}},
+    {"ph":"M","name":"thread_name","pid":1,"tid":2,"args":{"name":"quicksort.tarmac"}},
+    {"ph":"X","cat":"function","name":"_start","pid":1,"tid":1,"ts":1,"dur":2043,"args":{"pc":"0x8000","line":157}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":10,"dur":2017,"args":{"pc":"0x8038","line":177}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":367,"dur":1401,"args":{"pc":"0x8038","line":860}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":581,"dur":296,"args":{"pc":"0x8038","line":1265}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":656,"dur":76,"args":{"pc":"0x8038","line":1411}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":686,"dur":6,"args":{"pc":"0x8038","line":1472}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":719,"dur":6,"args":{"pc":"0x8038","line":1546}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":781,"dur":89,"args":{"pc":"0x8038","line":1681}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":821,"dur":42,"args":{"pc":"0x8038","line":1762}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":850,"dur":6,"args":{"pc":"0x8038","line":1822}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1050,"dur":520,"args":{"pc":"0x8038","line":2229}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1178,"dur":385,"args":{"pc":"0x8038","line":2478}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1275,"dur":156,"args":{"pc":"0x8038","line":2666}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1337,"dur":87,"args":{"pc":"0x8038","line":2789}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1378,"dur":6,"args":{"pc":"0x8038","line":2871}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1411,"dur":6,"args":{"pc":"0x8038","line":2945}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1480,"dur":76,"args":{"pc":"0x8038","line":3099}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1510,"dur":6,"args":{"pc":"0x8038","line":3160}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1543,"dur":6,"args":{"pc":"0x8038","line":3234}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1616,"dur":6,"args":{"pc":"0x8038","line":3399}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1677,"dur":84,"args":{"pc":"0x8038","line":3526}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1717,"dur":37,"args":{"pc":"0x8038","line":3607}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1741,"dur":6,"args":{"pc":"0x8038","line":3657}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1825,"dur":6,"args":{"pc":"0x8038","line":3843}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1891,"dur":129,"args":{"pc":"0x8038","line":3980}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1927,"dur":6,"args":{"pc":"0x8038","line":4052}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1971,"dur":42,"args":{"pc":"0x8038","line":4147}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":2000,"dur":6,"args":{"pc":"0x8038","line":4207}},
+    {"ph":"X","cat":"function","name":"sys_write0","pid":1,"tid":1,"ts":2030,"dur":3,"args":{"pc":"0x80ec","line":4290}},
+    {"ph":"X","cat":"function","name":"_start","pid":1,"tid":2,"ts":1,"dur":2043,"args":{"pc":"0x8000","line":157}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":10,"dur":2017,"args":{"pc":"0x8038","line":177}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":367,"dur":1401,"args":{"pc":"0x8038","line":860}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":581,"dur":296,"args":{"pc":"0x8038","line":1265}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":656,"dur":76,"args":{"pc":"0x8038","line":1411}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":686,"dur":6,"args":{"pc":"0x8038","line":1472}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":719,"dur":6,"args":{"pc":"0x8038","line":1546}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":781,"dur":89,"args":{"pc":"0x8038","line":1681}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":821,"dur":42,"args":{"pc":"0x8038","line":1762}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":850,"dur":6,"args":{"pc":"0x8038","line":1822}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1050,"dur":520,"args":{"pc":"0x8038","line":2229}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1178,"dur":385,"args":{"pc":"0x8038","line":2478}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1275,"dur":156,"args":{"pc":"0x8038","line":2666}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1337,"dur":87,"args":{"pc":"0x8038","line":2789}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1378,"dur":6,"args":{"pc":"0x8038","line":2871}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1411,"dur":6,"args":{"pc":"0x8038","line":2945}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1480,"dur":76,"args":{"pc":"0x8038","line":3099}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1510,"dur":6,"args":{"pc":"0x8038","line":3160}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1543,"dur":6,"args":{"pc":"0x8038","line":3234}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1616,"dur":6,"args":{"pc":"0x8038","line":3399}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1677,"dur":84,"args":{"pc":"0x8038","line":3526}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1717,"dur":37,"args":{"pc":"0x8038","line":3607}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1741,"dur":6,"args":{"pc":"0x8038","line":3657}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1825,"dur":6,"args":{"pc":"0x8038","line":3843}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1891,"dur":129,"args":{"pc":"0x8038","line":3980}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1927,"dur":6,"args":{"pc":"0x8038","line":4052}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":1971,"dur":42,"args":{"pc":"0x8038","line":4147}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":2,"ts":2000,"dur":6,"args":{"pc":"0x8038","line":4207}},
+    {"ph":"X","cat":"function","name":"sys_write0","pid":1,"tid":2,"ts":2030,"dur":3,"args":{"pc":"0x80ec","line":4290}}
+  ]
+}

tests/chrome-quicksort-symbols.ref

@@ -0,0 +1,35 @@
+{
+  "traceEvents": [
+    {"ph":"M","name":"process_name","pid":1,"tid":1,"args":{"name":"Tarmac trace"}},
+    {"ph":"M","name":"thread_name","pid":1,"tid":1,"args":{"name":"CPU 0"}},
+    {"ph":"X","cat":"function","name":"_start","pid":1,"tid":1,"ts":1,"dur":2043,"args":{"pc":"0x8000","line":157}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":10,"dur":2017,"args":{"pc":"0x8038","line":177}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":367,"dur":1401,"args":{"pc":"0x8038","line":860}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":581,"dur":296,"args":{"pc":"0x8038","line":1265}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":656,"dur":76,"args":{"pc":"0x8038","line":1411}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":686,"dur":6,"args":{"pc":"0x8038","line":1472}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":719,"dur":6,"args":{"pc":"0x8038","line":1546}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":781,"dur":89,"args":{"pc":"0x8038","line":1681}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":821,"dur":42,"args":{"pc":"0x8038","line":1762}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":850,"dur":6,"args":{"pc":"0x8038","line":1822}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1050,"dur":520,"args":{"pc":"0x8038","line":2229}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1178,"dur":385,"args":{"pc":"0x8038","line":2478}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1275,"dur":156,"args":{"pc":"0x8038","line":2666}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1337,"dur":87,"args":{"pc":"0x8038","line":2789}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1378,"dur":6,"args":{"pc":"0x8038","line":2871}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1411,"dur":6,"args":{"pc":"0x8038","line":2945}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1480,"dur":76,"args":{"pc":"0x8038","line":3099}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1510,"dur":6,"args":{"pc":"0x8038","line":3160}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1543,"dur":6,"args":{"pc":"0x8038","line":3234}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1616,"dur":6,"args":{"pc":"0x8038","line":3399}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1677,"dur":84,"args":{"pc":"0x8038","line":3526}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1717,"dur":37,"args":{"pc":"0x8038","line":3607}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1741,"dur":6,"args":{"pc":"0x8038","line":3657}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1825,"dur":6,"args":{"pc":"0x8038","line":3843}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1891,"dur":129,"args":{"pc":"0x8038","line":3980}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1927,"dur":6,"args":{"pc":"0x8038","line":4052}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":1971,"dur":42,"args":{"pc":"0x8038","line":4147}},
+    {"ph":"X","cat":"function","name":"quicksort","pid":1,"tid":1,"ts":2000,"dur":6,"args":{"pc":"0x8038","line":4207}},
+    {"ph":"X","cat":"function","name":"sys_write0","pid":1,"tid":1,"ts":2030,"dur":3,"args":{"pc":"0x80ec","line":4290}}
+  ]
+}

tools/CMakeLists.txt

@@ -25,6 +25,9 @@ standard_target_configuration(tarmac-callinfo)
 add_executable(tarmac-calltree calltree.cpp ${EXTRA_FILES})
 standard_target_configuration(tarmac-calltree)
 
+add_executable(tarmac-chromejson chrome.cpp ${EXTRA_FILES})
+standard_target_configuration(tarmac-chromejson)
+
 add_executable(tarmac-flamegraph flamegraph.cpp ${EXTRA_FILES})
 standard_target_configuration(tarmac-flamegraph)
 
@@ -38,7 +41,7 @@ add_executable(tarmac-vcd vcdwriter.cpp vcd.cpp ${EXTRA_FILES})
 standard_target_configuration(tarmac-vcd)
 
 install(TARGETS
-  tarmac-callinfo tarmac-calltree tarmac-flamegraph tarmac-profile
+  tarmac-callinfo tarmac-calltree tarmac-chromejson tarmac-flamegraph tarmac-profile
   tarmac-vcd
   EXPORT ${TTU_targets_export_name}
   RUNTIME)