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runtime: make gdb test resilient to line numbering

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Don't break on line number, instead break on the actual call.
This makes the test more robust to line numbering changes in the backend.

A CL (28950) changed the generated code line numbering slightly.  A MOVW
$0, R0 instruction at the start of the function changed to line
10 (because several constant zero instructions got CSEd, and one gets
picked arbitrarily).  That's too fragile for a test.

Change-Id: I5d6a8ef0603de7d727585004142780a527e70496
Reviewed-on: https://go-review.googlesource.com/29085
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Keith Randall 2016-09-12 15:19:36 -07:00
parent 6ca7c2055b
commit d00a3cead8
1 changed files with 5 additions and 2 deletions
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7
src/runtime/runtime-gdb_test.go
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@ -105,17 +105,20 @@ func TestGdbPython(t *testing.T) {
"-ex", "set startup-with-shell off", "-ex", "set startup-with-shell off",
"-ex", "info auto-load python-scripts", "-ex", "info auto-load python-scripts",
"-ex", "set python print-stack full", "-ex", "set python print-stack full",
"-ex", "br main.go:10", "-ex", "br fmt.Println",
"-ex", "run", "-ex", "run",
"-ex", "echo BEGIN info goroutines\n", "-ex", "echo BEGIN info goroutines\n",
"-ex", "info goroutines", "-ex", "info goroutines",
"-ex", "echo END\n", "-ex", "echo END\n",
"-ex", "up", // up from fmt.Println to main
"-ex", "echo BEGIN print mapvar\n", "-ex", "echo BEGIN print mapvar\n",
"-ex", "print mapvar", "-ex", "print mapvar",
"-ex", "echo END\n", "-ex", "echo END\n",
"-ex", "echo BEGIN print strvar\n", "-ex", "echo BEGIN print strvar\n",
"-ex", "print strvar", "-ex", "print strvar",
"-ex", "echo END\n"} "-ex", "echo END\n",
"-ex", "down", // back to fmt.Println (goroutine 2 below only works at bottom of stack. TODO: fix that)
}
// without framepointer, gdb cannot backtrace our non-standard // without framepointer, gdb cannot backtrace our non-standard
// stack frames on RISC architectures. // stack frames on RISC architectures.