2004-09-12 Andrew Cagney <cagney@gnu.org>

[deliverable/binutils-gdb.git] / gdb / PROBLEMS

diff --git a/gdb/PROBLEMS b/gdb/PROBLEMS
index c143bb3126e90dfa583a23e4e079ead9a27204a5..d1cc2b73fba354c5e50cd4f753747e0f75bb5177 100644 (file)
--- a/gdb/PROBLEMS
+++ b/gdb/PROBLEMS
@@ -1,11 +1,29 @@
 
-                       Known problems in GDB 6.1.1
+                       Known problems in GDB 6.2
 
                See also: http://www.gnu.org/software/gdb/bugs/
 
 
 *** Build problems
 
+build/1411: build fails on hpux 10.20 and hpux 11.00 with CMA threads
+
+GDB does not build on HP/UX 10.20 or HP/UX 11.00 if the CMA
+thread package is installed.  The compile error is:
+
+  ../../gdb/hpux-thread.c:222: variable-size type declared outside of any function
+
+This happens only if the CMA thread package is installed.
+
+As a workaround, you can disable support for CMA threads
+by editing the file gdb/configure.  Find the line:
+
+  if test -f /usr/include/dce/cma_config.h ; then
+
+And replace it with:
+
+  if false ; then
+
 build/1458: compile failed on hpux11
 
 GDB has build problems on HP/UX 11 with some versions of the HP
@@ -94,6 +112,19 @@ implement virtual base classes.  gcc 2.x generated just one object code
 function with a hidden parameter, but gcc 3.x conforms to a multi-vendor
 ABI for C++ which requires multiple object code functions.
 
+*** Signal handlers
+
+On many systems an attempt to single-step a system-call instruction
+results in two or more instructions being executed (the system-call,
+and one or more instructions following).
+
+When attempting to single-step through a signal trampoline, this
+problem may result the program unintentionally running to completion,
+or re-execute the faulting instruction, or even corrupting the program
+counter.
+
+Ref: PR breakpoints/1702.
+
 *** Stack backtraces
 
 GDB's core code base has been updated to use a new backtrace
@@ -109,23 +140,13 @@ When backtracing a thread, gdb does not stop when it reaches the
 outermost frame, instead continuing until it hits garbage.  This is
 sensitive to the operating system and thread library.
 
-hppa*-*-*
-mips*-*-*
-
-The MIPS and HPPA backtrace code has only very recently been updated
-to use GDB's new frame mechanism.  At present there are still a few
-problems, in particular backtraces through signal handlers do not
-work.
-
-People encountering problems with these architectures should consult
-GDB's web pages and mailing lists (http://www.gnu.org/software/gdb/)
-to see if there are updates.
+*** Threads
 
-powerpc*-*-*
+threads/1650: manythreads.exp
 
-PowerPC architecture support, in 6.1, does not use the new frame code.
+On GNU/Linux systems that use the old LinuxThreads thread library, a
+program rapidly creating and deleting threads can confuse GDB leading
+to an internal error.
 
-Fortunately, PowerPC architecture support, in GDB's mainline sources,
-have been updated.  People encountering problems should consider
-downloading a more current snapshot of GDB
-(http://www.gnu.org/software/gdb/current/).
+This problem does not occur on newer systems that use the NPTL
+library, and did not occur with GDB 6.1.