From 8764e9a3fc43f1117db77d1f056b6c3f15a29db3 Mon Sep 17 00:00:00 2001
From: Alex Coplan <alex.coplan@arm.com>
Date: Mon, 20 Jul 2020 16:15:29 +0100
Subject: [PATCH] jit: Fix truncation of testsuite output [PR69435]

This fixes a bug in jit.exp which causes the DejaGnu output of the
libgccjit testsuite to be nondeterministically truncated. This bug was
copied from DejaGnu's own implementation of the host_execute function.
See the upstream bug report [0] where the maintainers point out that the
regex patterns in host_execute should (but don't currently) explicitly
match newlines to avoid relying on DejaGnu not reading more than one
line of the output (which is not guaranteed).

This should make it easier to test jit patches in the future, since it
makes it possible to reliably compare the output of two jit.sum files
(as with the other tests in GCC).

[0] : https://debbugs.gnu.org/cgi/bugreport.cgi?bug=42399

gcc/testsuite/
	PR jit/69435
	* jit.dg/jit.exp (fixed_host_execute): Fix regex patterns to
	always explicitly match newlines.
---
 gcc/testsuite/jit.dg/jit.exp | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/gcc/testsuite/jit.dg/jit.exp b/gcc/testsuite/jit.dg/jit.exp
index 2f54681713b..2d8c884b6b8 100644
--- a/gcc/testsuite/jit.dg/jit.exp
+++ b/gcc/testsuite/jit.dg/jit.exp
@@ -202,37 +202,37 @@ proc fixed_host_execute {args} {
 	    set timetol 0
 	    exp_continue
 	}
-	-re "^$prefix\tNOTE:${text}*" {
+	-re "^$prefix\tNOTE:\[^\r\n\]+\r\n" {
 	    regsub "\[\n\r\t\]*NOTE: $text\r\n" $expect_out(0,string) "" output
-	    set output [string range $output 6 end]
+	    set output [string range $output 6 end-2]
 	    verbose "$output" 2
 	    set timetol 0
 	    exp_continue
 	}
-	-re "^$prefix\tPASSED:${text}*" {
+	-re "^$prefix\tPASSED:\[^\r\n\]+\r\n" {
 	    regsub "\[\n\r\t\]*PASSED: $text\r\n" $expect_out(0,string) "" output
-	    set output [string range $output 8 end]
+	    set output [string range $output 8 end-2]
 	    pass "$output"
 	    set timetol 0
 	    exp_continue
 	}
-	-re "^$prefix\tFAILED:${text}*" {
+	-re "^$prefix\tFAILED:\[^\r\n\]+\r\n" {
 	    regsub "\[\n\r\t\]*FAILED: $text\r\n" $expect_out(0,string) "" output
-	    set output [string range $output 8 end]
+	    set output [string range $output 8 end-2]
 	    fail "$output"
 	    set timetol 0
 	    exp_continue
 	}
-	-re "^$prefix\tUNTESTED:${text}*" {
+	-re "^$prefix\tUNTESTED:\[^\r\n\]+\r\n" {
 	    regsub "\[\n\r\t\]*TESTED: $text\r\n" $expect_out(0,string) "" output
-	    set output [string range $output 8 end]
+	    set output [string range $output 8 end-2]
 	    untested "$output"
 	    set timetol 0
 	    exp_continue
 	}
-	-re "^$prefix\tUNRESOLVED:${text}*" {
+	-re "^$prefix\tUNRESOLVED:\[^\r\n\]+\r\n" {
 	    regsub "\[\n\r\t\]*UNRESOLVED: $text\r\n" $expect_out(0,string) "" output
-	    set output [string range $output 8 end]
+	    set output [string range $output 8 end-2]
 	    unresolved "$output"
 	    set timetol 0
 	    exp_continue