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cmd/compile: ssa/debug_test.go very regressed on Linux (but not OSX) #25497

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dr2chase opened this issue May 22, 2018 · 1 comment

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commented May 22, 2018

I noticed this last night while trying to throughly test the changes to prologue end and DWARF version.
It appears to be some interaction with some other change, and no idea yet why it works on OSX.

Everything after a call to Fprintf or println is missing; if done by hand, the debugger races to the end.

    --- FAIL: TestNexting/gdb-opt-hist (1.63s)
    	debug_test.go:234: step/next histories differ, diff=
    		--- testdata/hist.gdb-opt.nexts	2018-05-22 06:09:57.601443878 -0400
    		+++ /tmp/debug_test255923597/test-hist.gdb-opt.nexts	2018-05-22 06:12:09.156909059 -0400
    		@@ -123,39 +123,3 @@
    		 91:			n += a
    		 90:			t += i * a
    		 92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
    		-86:		for i, a := range hist {
...
    		-86:		for i, a := range hist {
    		-98:	}
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commented May 22, 2018

Change https://golang.org/cl/114080 mentions this issue: cmd/compile: grow stack before test() to avoid gdb misbehavior

@odeke-em odeke-em changed the title ssa/debug_test.go very regressed on Linux (but not OSX) cmd/compile: ssa/debug_test.go very regressed on Linux (but not OSX) May 22, 2018

@odeke-em odeke-em added this to the Go1.11 milestone May 22, 2018

@gopherbot gopherbot closed this in 77c51c6 May 23, 2018

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