From d80cfc83325f8e95d35ecd9f15b36b96fa9ed3ee Mon Sep 17 00:00:00 2001
From: Simon South <simon@simonsouth.net>
Date: Sat, 6 Jun 2020 18:56:56 -0400
Subject: [PATCH] Disable branch-patching

This patch disables JamVM's branch-patching optimization, which tends
to make JamVM fail with an "Illegal instruction" error on x86_64 (and
possibly other architectures that use variable-length instructions)
when built using modern versions of gcc and glibc.
---
 src/init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/init.c b/src/init.c
index 32539cf..38ad54b 100644
--- a/src/init.c
+++ b/src/init.c
@@ -72,8 +72,8 @@ void setDefaultInitArgs(InitArgs *args) {
 #ifdef INLINING
     args->replication_threshold = 10;
     args->profile_threshold     = 10;
-    args->branch_patching_dup   = TRUE;
-    args->branch_patching       = TRUE;
+    args->branch_patching_dup   = FALSE;
+    args->branch_patching       = FALSE;
     args->print_codestats       = FALSE;
     args->join_blocks           = TRUE;
     args->profiling             = TRUE;
-- 
2.25.2

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<div class='path'>path: <a href='/guix/log/?id=c456d18b50f764d008ef46029201ef20584cd6f7'>root</a>/<a href='/guix/log/tests?id=c456d18b50f764d008ef46029201ef20584cd6f7'>tests</a>/<a href='/guix/log/tests/status.scm?id=c456d18b50f764d008ef46029201ef20584cd6f7'>status.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/status.scm?id=c456d18b50f764d008ef46029201ef20584cd6f7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-02-05 12:03:25 +0100'>2019-02-05</span></td><td><a href='/guix/commit/tests/status.scm?id=ba514b601ba6be15b823e0a12d4b6e42f9d2489e'>status: Keep track of the current build phase.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-29 12:09:52 +0100'>2019-01-29</span></td><td><a href='/guix/commit/tests/status.scm?id=73a8681a16869a2b3a9da1c7ba9434e07a204e19'>status: Keep track of build completion as reported by build tools.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-29 12:09:52 +0100'>2019-01-29</span></td><td><a href='/guix/commit/tests/status.scm?id=976ef2d97887d16eab8d4eb9dad811786b04d690'>status: Record more information about builds.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>