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go/pointer: disable analysis of runtime package 

It has few interesting effects on aliasing and it contains a lot of
unsafe code that we can't analyze.

Change-Id: I66d3592ea7797802c6be36eb30fd17e2ee307e50
Reviewed-on: https://go-review.googlesource.com/21260
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Alan Donovan 2016-03-29 10:29:08 -04:00
parent 681404b4b2
commit 0d7417cc02
1 changed files with 119 additions and 138 deletions
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31
go/pointer/intrinsics.go
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@ -108,32 +108,8 @@ func init() {
"net.runtime_pollWait": ext۰NoEffect,
"net.runtime_pollWaitCanceled": ext۰NoEffect,
"os.epipecheck": ext۰NoEffect,
"runtime.BlockProfile": ext۰NoEffect,
"runtime.Breakpoint": ext۰NoEffect,
"runtime.CPUProfile": ext۰NoEffect, // good enough
"runtime.Caller": ext۰NoEffect,
"runtime.Callers": ext۰NoEffect, // good enough
"runtime.FuncForPC": ext۰NoEffect,
"runtime.GC": ext۰NoEffect,
"runtime.GOMAXPROCS": ext۰NoEffect,
"runtime.Goexit": ext۰NoEffect,
"runtime.GoroutineProfile": ext۰NoEffect,
"runtime.Gosched": ext۰NoEffect,
"runtime.MemProfile": ext۰NoEffect,
"runtime.NumCPU": ext۰NoEffect,
"runtime.NumGoroutine": ext۰NoEffect,
"runtime.ReadMemStats": ext۰NoEffect,
"runtime.SetBlockProfileRate": ext۰NoEffect,
"runtime.SetCPUProfileRate": ext۰NoEffect,
// All other runtime functions are treated as NoEffect.
"runtime.SetFinalizer": ext۰runtime۰SetFinalizer,
"runtime.Stack": ext۰NoEffect,
"runtime.ThreadCreateProfile": ext۰NoEffect,
"runtime.cstringToGo": ext۰NoEffect,
"runtime.funcentry_go": ext۰NoEffect,
"runtime.funcline_go": ext۰NoEffect,
"runtime.funcname_go": ext۰NoEffect,
"runtime.getgoroot": ext۰NoEffect,
"runtime/pprof.runtime_cyclesPerSecond": ext۰NoEffect,
"strings.IndexByte": ext۰NoEffect,
"sync.runtime_Semacquire": ext۰NoEffect,
"sync.runtime_Semrelease": ext۰NoEffect,
@ -200,6 +176,11 @@ func (a *analysis) findIntrinsic(fn *ssa.Function) intrinsic {
// Ensure all "reflect" code is treated intrinsically.
impl = ext۰NotYetImplemented
}
} else if impl == nil && fn.Pkg != nil && fn.Pkg.Pkg.Path() == "runtime" {
// Ignore "runtime" (except SetFinalizer):
// it has few interesting effects on aliasing
// and is full of unsafe code we can't analyze.
impl = ext۰NoEffect
}
a.intrinsics[fn] = impl