From 3c73e014458f7ce102aed1d219f487e97ee24a08 Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@schwinge.name>
Date: Tue, 16 Nov 2010 10:21:35 +0100
Subject: open_issues/boehm-gc: Some more.
---
open_issues/boehm-gc.mdwn | 93 +++++++++++++++++++++++------------------------
1 file changed, 45 insertions(+), 48 deletions(-)
(limited to 'open_issues')
diff --git a/open_issues/boehm-gc.mdwn b/open_issues/boehm-gc.mdwn
index 64730dc8..f6896740 100644
--- a/open_issues/boehm-gc.mdwn
+++ b/open_issues/boehm-gc.mdwn
@@ -14,8 +14,11 @@ License|/fdl]]."]]"""]]
It is used by [[GCC]], for example.
-[[tschwinge]] reviewed its GNU/Hurd port / configuration on 2010-11-10,
-based on CVS HEAD sources from 2010-11-04, converted to Git:
+
+# Configuration
+
+[[tschwinge]] reviewed its GNU/Hurd port's configuration on 2010-11-10, based
+on CVS HEAD sources from 2010-11-16, converted to Git:
9abb37b2e581b415bb1f482085891a289c2c0be1.
* `configure.ac`
@@ -34,54 +37,23 @@ based on CVS HEAD sources from 2010-11-04, converted to Git:
keep_back_ptrs=true
AC_DEFINE([DBG_HDRS_ALL], 1,
[Define to force debug headers on all objects.])
+ case $host in
+ x86-*-linux* | i586-*-linux* | i686-*-linux* | x86_64-*-linux* )
AC_DEFINE(MAKE_BACK_GRAPH)
AC_MSG_WARN("Client must not use -fomit-frame-pointer.")
AC_DEFINE(SAVE_CALL_COUNT, 8)
+ ;;
AM_CONDITIONAL([KEEP_BACK_PTRS], [test x"$keep_back_ptrs" = xtrue])
* `configure.host`
Nothing.
- * `Makefile.am`, `include/include.am`, `cord/cord.am`, `doc/doc.am`
+ * `Makefile.am`, `include/include.am`, `cord/cord.am`, `doc/doc.am`,
+ `tests/tests.am`
Nothing.
- * `tests/tests.am`
-
- if KEEP_BACK_PTRS
- TESTS += tracetest$(EXEEXT)
- check_PROGRAMS += tracetest
- tracetest_SOURCES = tests/trace_test.c
- tracetest_LDADD = $(test_ldadd)
- endif
-
- if THREADS
- TESTS += threadleaktest$(EXEEXT)
- check_PROGRAMS += threadleaktest
- threadleaktest_SOURCES = tests/thread_leak_test.c
- threadleaktest_LDADD = $(test_ldadd)
- endif
-
- if CPLUSPLUS
- TESTS += test_cpp$(EXEEXT)
- check_PROGRAMS += test_cpp
- test_cpp_SOURCES = tests/test_cpp.cc
- if AVOID_CPP_LIB
- test_cpp_LDADD = gc_cpp.o $(test_ldadd)
- else
- test_cpp_LDADD = libgccpp.la $(test_ldadd)
- endif
- endif
-
- * `doc/README.macros`
-
- TODO.
-
- * `doc/porting.html`
-
- TODO.
-
* `include/gc_config_macros.h`
Should be OK.
@@ -205,12 +177,12 @@ based on CVS HEAD sources from 2010-11-04, converted to Git:
/* We tried ... */
#endif
- Being on [[glibc]], we could perhaps do similar as
- `USE_LIBC_PRIVATES` instead of `HEURISTIC2`. Pro: avoid
- `SIGSEGV` (and general fragility) during probing at startup (if
- I'm understanding this correctly). Con: rely on glibc internals.
- Or we instead add support to parse `/proc/` (can even use the
- same as Linux?), or use some other interface.
+ Being on [[glibc]], we could perhaps do similar as `USE_LIBC_PRIVATES`
+ instead of `HEURISTIC2`. Pro: avoid `SIGSEGV` (and general fragility)
+ during probing at startup (if I'm understanding this correctly). Con:
+ rely on glibc internals. Or we instead add support to parse
+ [[`/proc/`|hurd/translator/procfs]] (can even use the same as Linux?),
+ or use some other interface. [[!tag open_issue_glibc]]
* `#define SIG_SUSPEND SIGUSR1`, `#define SIG_THR_RESTART SIGUSR2`
@@ -221,11 +193,25 @@ based on CVS HEAD sources from 2010-11-04, converted to Git:
* `mach_dep.c`
- TODO.
+ * `#define NO_GETCONTEXT`
+
+ [[!taglink open_issue_glibc]], but this is not a real problem here,
+ because we can use the following GCC internal function without much
+ overhead:
+
+ * `GC_with_callee_saves_pushed`
+
+ The `HAVE_BUILTIN_UNWIND_INIT` case is ours.
* `os_dep.c`
- TODO.
+ * `read`
+
+ Sure that it doesn't internally (in [[glibc]]) use `malloc`. Probably
+ only / mostly (?) a problem for `--enable-redirect-malloc`
+ configurations? Linux with threads uses `readv`.
+
+ * TODO.
* `dyn_load.c`
@@ -250,9 +236,20 @@ based on CVS HEAD sources from 2010-11-04, converted to Git:
Nothing.
----
-Other TODOs:
+# Testsuite
+
+There are different configurations possible, but in general, the testsuite
+restults of GNU/Linux and GNU/Hurd look very similar.
+
+## `--enable-cplusplus --enable-gc-debug`
+
+ * GNU/Hurd is missing *Call chain at allocation: [...] output*.
+
+ `os_dep.c`:`GC_print_callers`
+
+
+# TODO
* [[gcc/boehm_gc]]
--
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