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| author | Andrew Cagney <cagney@redhat.com> | 2004-07-21 16:16:56 +0000 |
|---|---|---|
| committer | Andrew Cagney <cagney@redhat.com> | 2004-07-21 16:16:56 +0000 |
| commit | 3c4d50de72cb887b0c6aebffeedf85eb7433e668 (patch) | |
| tree | 6a3ad2bbca88f35cdc022dad6c702ca100858d2b | |
| parent | 85ae447369ba3ff95fb64359c00a930cc16c62ca (diff) | |
| download | gdb-3c4d50de72cb887b0c6aebffeedf85eb7433e668.tar.gz | |
2004-07-21 Andrew Cagney <cagney@gnu.org>
* PROBLEMS: Mention breakpoints/1702.
* NEWS: For signal trampolines, cite s390 GNU/Linux as a system
that is known to work.
| -rw-r--r-- | gdb/NEWS | 5 | ||||
| -rw-r--r-- | gdb/PROBLEMS | 13 |
2 files changed, 16 insertions, 2 deletions
@@ -36,8 +36,9 @@ of sa_sigaction signal trampolines; backtrace from a NULL pointer call; backtrace through a signal trampoline; step into and out of signal handlers; and single-stepping in the signal trampoline. -These fixes were tested on i386 GNU/Linux systems that include a 2.4 -kernel. +Please note that kernel bugs are a limiting factor here. These +features have been shown to work on an s390 GNU/Linux system that +include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. * Cygwin support for DWARF 2 added. diff --git a/gdb/PROBLEMS b/gdb/PROBLEMS index 7baf1d2e831..2bb66bbd8df 100644 --- a/gdb/PROBLEMS +++ b/gdb/PROBLEMS @@ -94,6 +94,19 @@ 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 |