perf_hooks: fix timing

Fixes: https://github.com/nodejs/node/issues/17892
Fixes: https://github.com/nodejs/node/issues/17893
Fixes: https://github.com/nodejs/node/issues/18992

PR-URL: https://github.com/nodejs/node/pull/18993
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/node_perf.h b/src/node_perf.h
index 82e3f46eb8..0db99acd03 100644
--- a/src/node_perf.h
+++ b/src/node_perf.h
@@ -23,6 +23,10 @@ using v8::Local;
 using v8::Object;
 using v8::Value;
 
+extern const uint64_t timeOrigin;
+
+double GetCurrentTimeInMicroseconds();
+
 static inline PerformanceMilestone ToPerformanceMilestoneEnum(const char* str) {
 #define V(name, label)                                                        \
   if (strcmp(str, label) == 0) return NODE_PERFORMANCE_MILESTONE_##name;
@@ -78,11 +82,11 @@ class PerformanceEntry {
     return ToPerformanceEntryTypeEnum(type().c_str());
   }
 
-  double startTime() const { return startTime_ / 1e6; }
+  double startTime() const { return startTimeNano() / 1e6; }
 
   double duration() const { return durationNano() / 1e6; }
 
-  uint64_t startTimeNano() const { return startTime_; }
+  uint64_t startTimeNano() const { return startTime_ - timeOrigin; }
 
   uint64_t durationNano() const { return endTime_ - startTime_; }