runtime/pprof: TestCPUProfile fails, "profile too short" on go 1.0.3 #4466
Description
by jsawczuk:
When trying to build Go 1.0.3, TestCPUProfile fails on a VirtualBox with Fedora 16 as
its guest OS. I read somewhere that the IO APIC VBox setting is relevant here, and its
enabled. The build succeeds in Go 1.0.2.
Test output:
--- FAIL: TestCPUProfile (0.46 seconds)
pprof_test.go:57: profile too short: [0x0 0x3 0x0 0x2710 0x0 0x0 0x1 0x0]
FAIL
FAIL runtime/pprof 0.470s
uname -a:
Linux jsawdev 3.6.6-1.fc16.x86_64 #1 SMP Mon Nov 5 16:56:43 UTC 2012 x86_64 x86_64
x86_64 GNU/Linux
Relevant diff in pprof_test.go:
+ l := len(bytes) / int(unsafe.Sizeof(uintptr(0)))
val := *(*[]uintptr)(unsafe.Pointer(&bytes))
- val = val[:len(bytes)/int(unsafe.Sizeof(uintptr(0)))]
+ val = val[:l]
- if len(val) < 10 {
+ if l < 13 {
t.Fatalf("profile too short: %#x", val)
}
Let me know if I can provide any additional information. Thanks!