}

  // Verify that stack traces of func is copied to graph function library.
  ASSERT_NE(func_stack_traces, nullptr);
  EXPECT_EQ(func_stack_traces->size(), 4);
  EXPECT_EQ(func_stack_traces->at("neg")->ToString({}), kNegStackToString);
  EXPECT_EQ(func_stack_traces->at("feed")->ToString({}), kFeedStackToString);

  // Verify that stack traces of grad_func is copied to graph function library.

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		t.Logf("%s:\n%s", cmd.Args, out)
		if err != nil {
			t.Error(err)
			continue
		}

		trace := findTrace(string(out), top)
		if len(trace) == 0 {
			t.Errorf("%s traceback missing.", top)
			continue
		}
		if trace[len(trace)-1] != bottom {
			t.Errorf("invalid traceback origin: got=%v; want=[%s ... %s]", trace, top, bottom)
		}
	}
}

func TestCgoPprof(t *testing.T) {

	firstPCSymbolizeResult symbolizeFlag
}

func (d *pcDeck) reset() {
	d.pcs = d.pcs[:0]
	d.frames = d.frames[:0]
	d.symbolizeResult = 0
	d.firstPCFrames = 0
	d.firstPCSymbolizeResult = 0
}

// tryAdd tries to add the pc and Frames expanded from it (most likely one,
// since the stack trace is already fully expanded) and the symbolizeResult
// to the deck. If it fails the caller needs to flush the deck and retry.

	"sort"
	"strings"
	"sync"
	"time"
)

// Trace emits a trace event for the operation and file path to the trace log,
// but only when $GODEBUG contains gofsystrace=1.
// The traces are appended to the file named by the $GODEBUG setting gofsystracelog, or else standard error.
// For debugging, if the $GODEBUG setting gofsystracestack is non-empty, then trace events for paths

						break
					}
					i++
				}
				tb.frames = tb.frames[1:]
			}
			if !t.Failed() && len(tb.frames) > 0 {
				t.Errorf("got %d more frames than expected", len(tb.frames))
			}
			if t.Failed() {
				t.Logf("traceback diverged at frame %d", i)
				off := len(stack)
				if len(tb.frames) > 0 {
					off = tb.frames[0].off
				}
				t.Logf("traceback before error:\n%s", stack[:off])

                                                     TF_Buffer* buf,
                                                     TF_Status* status);

// Get GraphDebugInfo containing stack traces mapping to node names
TF_CAPI_EXPORT extern void TFE_ContextGetGraphDebugInfo(
    TFE_Context* ctx, const char* function_name, TF_Buffer* buf,
    TF_Status* status);

// Extracts a TF_Function from the context.

	n := tracebackPCs(&u, 0, pcbuf)
	r.Stack = make([]uintptr, n)
	copy(r.Stack, pcbuf)
}

// Stack formats a stack trace of the calling goroutine into buf
// and returns the number of bytes written to buf.
// If all is true, Stack formats stack traces of all other goroutines
// into buf after the trace for the current goroutine.
func Stack(buf []byte, all bool) int {
	var stw worldStop
	if all {

// needing different casings of a file path, but it would be fairly illegible
// to most programmers when those paths appeared in the file system
// (including in file paths in compiler errors and stack traces)
// in web server logs, and so on. Instead, we want a safe escaped form that
// leaves most paths unaltered.
//
// The safe escaped form is to replace every uppercase letter

const usesLR = sys.MinFrameSize > 0

const (
	// tracebackInnerFrames is the number of innermost frames to print in a
	// stack trace. The total maximum frames is tracebackInnerFrames +
	// tracebackOuterFrames.
	tracebackInnerFrames = 50

	// tracebackOuterFrames is the number of outermost frames to print in a
	// stack trace.
	tracebackOuterFrames = 50
)

// unwindFlags control the behavior of various unwinders.