Add coverage

tools/telemetry/third_party/coverage/coverage/ctracer/tracer.h

Index: tools/telemetry/third_party/coverage/coverage/ctracer/tracer.h
diff --git a/tools/telemetry/third_party/coverage/coverage/ctracer/tracer.h b/tools/telemetry/third_party/coverage/coverage/ctracer/tracer.h
new file mode 100644
index 0000000000000000000000000000000000000000..053fbf62677f684c4a8aed4a1f785e5ebf17dc2f
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+++ b/tools/telemetry/third_party/coverage/coverage/ctracer/tracer.h
@@ -0,0 +1,68 @@
+/* Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 */
+/* For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt */
+
+#ifndef _COVERAGE_TRACER_H
+#define _COVERAGE_TRACER_H
+
+#include "util.h"
+#include "structmember.h"
+#include "frameobject.h"
+#include "opcode.h"
+
+#include "datastack.h"
+
+/* The CTracer type. */
+
+typedef struct CTracer {
+    PyObject_HEAD
+
+    /* Python objects manipulated directly by the Collector class. */
+    PyObject * should_trace;
+    PyObject * check_include;
+    PyObject * warn;
+    PyObject * concur_id_func;
+    PyObject * data;
+    PyObject * file_tracers;
+    PyObject * should_trace_cache;
+    PyObject * trace_arcs;
+
+    /* Has the tracer been started? */
+    int started;
+    /* Are we tracing arcs, or just lines? */
+    int tracing_arcs;
+
+    /*
+        The data stack is a stack of dictionaries.  Each dictionary collects
+        data for a single source file.  The data stack parallels the call stack:
+        each call pushes the new frame's file data onto the data stack, and each
+        return pops file data off.
+
+        The file data is a dictionary whose form depends on the tracing options.
+        If tracing arcs, the keys are line number pairs.  If not tracing arcs,
+        the keys are line numbers.  In both cases, the value is irrelevant
+        (None).
+    */
+
+    DataStack data_stack;           /* Used if we aren't doing concurrency. */
+
+    PyObject * data_stack_index;    /* Used if we are doing concurrency. */
+    DataStack * data_stacks;
+    int data_stacks_alloc;
+    int data_stacks_used;
+    DataStack * pdata_stack;
+
+    /* The current file's data stack entry, copied from the stack. */
+    DataStackEntry cur_entry;
+
+    /* The parent frame for the last exception event, to fix missing returns. */
+    PyFrameObject * last_exc_back;
+    int last_exc_firstlineno;
+
+    Stats stats;
+} CTracer;
+
+int CTracer_intern_strings(void);
+
+extern PyTypeObject CTracerType;
+
+#endif /* _COVERAGE_TRACER_H */