goroutine 1 [running]: runtime/pprof.writeGoroutineStacks(0x4124060, 0xc000010018, 0x1000000000030, 0x4713e40) /usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:693 +0x9f runtime/pprof.writeGoroutine(0x4124060, 0xc000010018, 0x2, 0x0, 0x50) /usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:682 +0x45 runtime/pprof.(*Profile).WriteTo(0x41b45a0, 0x4124060, 0xc000010018, 0x2, 0xffffffff, 0xc00007a058) /usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:331 +0x3f2 main.main() /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:40 +0xbb goroutine 6 [syscall]: main._Cfunc_c_sleep_loop(0xf4240) _cgo_gotypes.go:56 +0x45 main.cSleepLoop(0x3b9aca00) /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:44 +0x45 created by main.main /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:36 +0x45 goroutine 7 [sleep, locked to thread]: time.Sleep(0x3b9aca00) /usr/local/Cellar/go/1.15.6/libexec/src/runtime/time.go:188 +0xbf main.goSleep(...) /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:53 main._cgoexpwrap_65ad5df3a112_goSleep(0xf4240, 0xc000001b00) _cgo_gotypes.go:73 +0x34 main._Cfunc_c_go_sleep_loop(0xf4240) _cgo_gotypes.go:43 +0x45 main.cGoSleepLoop(0x3b9aca00) /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:48 +0x45 created by main.main /Users/felix.geisendoerfer/go/src/github.com/DataDog/dd-trace-go/profiler/internal/stackparse/test-fixtures/cgo.go:37 +0x66