pkg/manager: show number of times coverage for each call has overflowed

If the overflows happen often, it's bad.
Add visibility into this.

3 files changed, 31 insertions, 17 deletions

diff --git a/pkg/flatrpc/flatrpc.fbs b/pkg/flatrpc/flatrpc.fbs
index 51066d9a4..0bd32b743 100644
--- a/pkg/flatrpc/flatrpc.fbs
+++ b/pkg/flatrpc/flatrpc.fbs
@@ -202,6 +202,7 @@ enum CallFlag : uint8 (bit_flags) {
 	Finished,		// finished executing (rather than blocked forever)
 	Blocked,		// finished but blocked during execution
 	FaultInjected,		// fault was injected into this call
+	CoverageOverflow,	// coverage buffer has overflowed so we have truncated coverage
 }
 
 table CallInfoRaw {
diff --git a/pkg/flatrpc/flatrpc.go b/pkg/flatrpc/flatrpc.go
index 0a9c0e0d0..8445cde2d 100644
--- a/pkg/flatrpc/flatrpc.go
+++ b/pkg/flatrpc/flatrpc.go
@@ -392,24 +392,27 @@ func (v ExecFlag) String() string {
 type CallFlag byte
 
 const (
-	CallFlagExecuted      CallFlag = 1
-	CallFlagFinished      CallFlag = 2
-	CallFlagBlocked       CallFlag = 4
-	CallFlagFaultInjected CallFlag = 8
+	CallFlagExecuted         CallFlag = 1
+	CallFlagFinished         CallFlag = 2
+	CallFlagBlocked          CallFlag = 4
+	CallFlagFaultInjected    CallFlag = 8
+	CallFlagCoverageOverflow CallFlag = 16
 )
 
 var EnumNamesCallFlag = map[CallFlag]string{
-	CallFlagExecuted:      "Executed",
-	CallFlagFinished:      "Finished",
-	CallFlagBlocked:       "Blocked",
-	CallFlagFaultInjected: "FaultInjected",
+	CallFlagExecuted:         "Executed",
+	CallFlagFinished:         "Finished",
+	CallFlagBlocked:          "Blocked",
+	CallFlagFaultInjected:    "FaultInjected",
+	CallFlagCoverageOverflow: "CoverageOverflow",
 }
 
 var EnumValuesCallFlag = map[string]CallFlag{
-	"Executed":      CallFlagExecuted,
-	"Finished":      CallFlagFinished,
-	"Blocked":       CallFlagBlocked,
-	"FaultInjected": CallFlagFaultInjected,
+	"Executed":         CallFlagExecuted,
+	"Finished":         CallFlagFinished,
+	"Blocked":          CallFlagBlocked,
+	"FaultInjected":    CallFlagFaultInjected,
+	"CoverageOverflow": CallFlagCoverageOverflow,
 }
 
 func (v CallFlag) String() string {
diff --git a/pkg/flatrpc/flatrpc.h b/pkg/flatrpc/flatrpc.h
index 5232114b3..94e1c15f6 100644
--- a/pkg/flatrpc/flatrpc.h
+++ b/pkg/flatrpc/flatrpc.h
@@ -649,23 +649,25 @@ enum class CallFlag : uint8_t {
   Finished = 2,
   Blocked = 4,
   FaultInjected = 8,
+  CoverageOverflow = 16,
   NONE = 0,
-  ANY = 15
+  ANY = 31
 };
 FLATBUFFERS_DEFINE_BITMASK_OPERATORS(CallFlag, uint8_t)
 
-inline const CallFlag (&EnumValuesCallFlag())[4] {
+inline const CallFlag (&EnumValuesCallFlag())[5] {
   static const CallFlag values[] = {
     CallFlag::Executed,
     CallFlag::Finished,
     CallFlag::Blocked,
-    CallFlag::FaultInjected
+    CallFlag::FaultInjected,
+    CallFlag::CoverageOverflow
   };
   return values;
 }
 
 inline const char * const *EnumNamesCallFlag() {
-  static const char * const names[9] = {
+  static const char * const names[17] = {
     "Executed",
     "Finished",
     "",
@@ -674,13 +676,21 @@ inline const char * const *EnumNamesCallFlag() {
     "",
     "",
     "FaultInjected",
+    "",
+    "",
+    "",
+    "",
+    "",
+    "",
+    "",
+    "CoverageOverflow",
     nullptr
   };
   return names;
 }
 
 inline const char *EnumNameCallFlag(CallFlag e) {
-  if (flatbuffers::IsOutRange(e, CallFlag::Executed, CallFlag::FaultInjected)) return "";
+  if (flatbuffers::IsOutRange(e, CallFlag::Executed, CallFlag::CoverageOverflow)) return "";
   const size_t index = static_cast<size_t>(e) - static_cast<size_t>(CallFlag::Executed);
   return EnumNamesCallFlag()[index];
 }