From 4cf6eebf94d50cd62e9bbbaedd4ece699838ed75 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 4 Feb 2025 01:10:40 +0100
Subject: libpipe: crash verbosely if mmap was to fail

---
 libpipe/pq.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libpipe/pq.c b/libpipe/pq.c
index fff03e67..069b41bc 100644
--- a/libpipe/pq.c
+++ b/libpipe/pq.c
@@ -410,7 +410,13 @@ packet_fetch (struct packet *packet,
 	/* Just copy the data the old fashioned way....  */
 	{
 	  if (*data_len < amount)
-	    *data = mmap (0, amount, PROT_READ|PROT_WRITE, MAP_ANON, 0, 0);
+	    {
+	      *data = mmap (0, amount, PROT_READ|PROT_WRITE, MAP_ANON, 0, 0);
+	      if (*data == MAP_FAILED)
+		assert_perror_backtrace (errno);
+	      else
+		assert_backtrace (*data);
+	    }
 
 	  memcpy (*data, start, amount);
 	  start += amount;
-- 
cgit v1.2.3