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authorThomas Schwinge <thomas@codesourcery.com>2012-12-20 22:13:17 +0100
committerThomas Schwinge <thomas@codesourcery.com>2012-12-20 22:13:17 +0100
commitc77f17cfb827c17de7f1d5318cbbbeea03286715 (patch)
treec72a20c83f42c10967120c633edd51628240611f /glibc
parent8e4cd1e9147637ead1ef782cb67a660eb45845a1 (diff)
open_issues/fork_deadlock: Data I collected.
Diffstat (limited to 'glibc')
-rw-r--r--glibc/critical_section.mdwn19
-rw-r--r--glibc/signal.mdwn4
-rw-r--r--glibc/signal/discussion.mdwn1
3 files changed, 23 insertions, 1 deletions
diff --git a/glibc/critical_section.mdwn b/glibc/critical_section.mdwn
new file mode 100644
index 00000000..98ed86e9
--- /dev/null
+++ b/glibc/critical_section.mdwn
@@ -0,0 +1,19 @@
+[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+Quoting from `hurd/hurd/signal.h`:
+
+> A *critical section* is a section of code which cannot safely be interrupted
+> to run a [[signal handler|signal]]; for example, code that holds any lock
+> cannot be interrupted lest the signal handler try to take the same lock and
+> deadlock result.
+
+[[!tag open_issue_glibc]]Checking the code for any violations would be a useful
+task of [[open_issues/code_analysis]]/[[open_issues/formal_verification]].
diff --git a/glibc/signal.mdwn b/glibc/signal.mdwn
index 727247ac..77df1c57 100644
--- a/glibc/signal.mdwn
+++ b/glibc/signal.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2009, 2010, 2011 Free Software Foundation,
+[[!meta copyright="Copyright © 2009, 2010, 2011, 2012 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
@@ -27,6 +27,8 @@ implemented in [[glibc]].
[[!taglink open_issue_glibc]]
+ * [[Critical_Section]]s
+
# Further Reading
diff --git a/glibc/signal/discussion.mdwn b/glibc/signal/discussion.mdwn
index 064c1c5b..8687e173 100644
--- a/glibc/signal/discussion.mdwn
+++ b/glibc/signal/discussion.mdwn
@@ -11,6 +11,7 @@ License|/fdl]]."]]"""]]
# `_hurd_sigstates`
+[[!tag open_issue_glibc]]
In an [[hurd/translator/ext2fs]] instance with 1068 threads, `_hurd_sigstates`
was a linked with with 1067 entries, in one with 351 threads, 351 entries. Is
this noticeable already? Perhaps a different data structure is needed?