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According to Bruno Haible on 4/28/2008 4:06 PM:
| Why should a developer who uses gnulib have to write valgrind
suppression files
| to work around ISO C99 violations in gnulib? We can at least provide a
| strchrnul.valgrind file, like the 'malloca' module already does.
Done, in the patch below; the patch is untested, since valgrind does not
run on cygwin, but the result is similar to malloca.valgrind and matches
the documentation found at
http://valgrind.org/docs/manual/manual-core.html#manual-core.suppress.
| Then this
| developer can use the option
| --suppressions=$(srcdir)/strchrnul.valgrind
| in his Makefile. Several --suppressions options can be given;
gnulib-tool does
| not need to combine the various suppressions files.
Well, for now we are safe. But 'man valgrind' states:
~ --suppressions=<filename> [default: $PREFIX/lib/valgrind/default.supp]
~ Specifies an extra file from which to read
~ descriptions of errors to suppress. You may spec-
~ ify up to 10 additional suppression files.
I hate it when programs have arbitrary limits.
Also, it looks like the valgrind --partial-loads-ok option is supposed to
be a good heuristic for use cases such as what is in strchrnul and rawmemchr.
- --
Don't work too hard, make some time for fun as well!
Eric Blake [EMAIL PROTECTED]
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>From f54ab4c77f02cdc8fc480d2bb0aa406eb8ff9039 Mon Sep 17 00:00:00 2001
From: Eric Blake <[EMAIL PROTECTED]>
Date: Tue, 29 Apr 2008 06:08:44 -0600
Subject: [PATCH] Silence valgrind on safe reads beyond potential array bounds.
* lib/rawmemchr.valgrind: New file.
* lib/strchrnul.valgrind: Likewise.
* modules/rawmemchr (Files): Distribute new file.
* modules/strchrnul (Files): Likewise.
Suggested by Bruno Haible.
Signed-off-by: Eric Blake <[EMAIL PROTECTED]>
---
ChangeLog | 9 +++++++++
lib/rawmemchr.valgrind | 12 ++++++++++++
lib/strchrnul.valgrind | 12 ++++++++++++
modules/rawmemchr | 1 +
modules/strchrnul | 1 +
5 files changed, 35 insertions(+), 0 deletions(-)
create mode 100644 lib/rawmemchr.valgrind
create mode 100644 lib/strchrnul.valgrind
diff --git a/ChangeLog b/ChangeLog
index ceaee07..ed3c210 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2008-04-29 Eric Blake <[EMAIL PROTECTED]>
+
+ Silence valgrind on safe reads beyond potential array bounds.
+ * lib/rawmemchr.valgrind: New file.
+ * lib/strchrnul.valgrind: Likewise.
+ * modules/rawmemchr (Files): Distribute new file.
+ * modules/strchrnul (Files): Likewise.
+ Suggested by Bruno Haible.
+
2008-04-29 Bruno Haible <[EMAIL PROTECTED]>
* lib/arpa_inet.in.h: Include system's <arpa/inet.h> if it exists.
diff --git a/lib/rawmemchr.valgrind b/lib/rawmemchr.valgrind
new file mode 100644
index 0000000..6363923
--- /dev/null
+++ b/lib/rawmemchr.valgrind
@@ -0,0 +1,12 @@
+# Suppress a valgrind message about use of uninitialized memory in rawmemchr().
+# This use is OK because it provides only a speedup.
+{
+ rawmemchr-value4
+ Memcheck:Value4
+ fun:rawmemchr
+}
+{
+ rawmemchr-value8
+ Memcheck:Value8
+ fun:rawmemchr
+}
diff --git a/lib/strchrnul.valgrind b/lib/strchrnul.valgrind
new file mode 100644
index 0000000..b14fa13
--- /dev/null
+++ b/lib/strchrnul.valgrind
@@ -0,0 +1,12 @@
+# Suppress a valgrind message about use of uninitialized memory in strchrnul().
+# This use is OK because it provides only a speedup.
+{
+ strchrnul-value4
+ Memcheck:Value4
+ fun:strchrnul
+}
+{
+ strchrnul-value8
+ Memcheck:Value8
+ fun:strchrnul
+}
diff --git a/modules/rawmemchr b/modules/rawmemchr
index bcbe7e8..d8fdbbb 100644
--- a/modules/rawmemchr
+++ b/modules/rawmemchr
@@ -3,6 +3,7 @@ rawmemchr() function: Find the first occurrence of C in S.
Files:
lib/rawmemchr.c
+lib/rawmemchr.valgrind
m4/rawmemchr.m4
Depends-on:
diff --git a/modules/strchrnul b/modules/strchrnul
index 2901768..2f75450 100644
--- a/modules/strchrnul
+++ b/modules/strchrnul
@@ -4,6 +4,7 @@ byte.
Files:
lib/strchrnul.c
+lib/strchrnul.valgrind
m4/strchrnul.m4
Depends-on:
--
1.5.5.1
