gdb/gdb-rhel5-compat.patch

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2010-01-12 22:15:57 +00:00
gdb/linux-nat.c:
- Workaround RHEL-5 kernels for detaching SIGSTOPped processes (BZ 498595).
Index: gdb-7.2.50.20110104/gdb/elfread.c
===================================================================
--- gdb-7.2.50.20110104.orig/gdb/elfread.c 2011-01-04 06:15:59.000000000 +0100
+++ gdb-7.2.50.20110104/gdb/elfread.c 2011-01-04 06:17:54.000000000 +0100
@@ -832,7 +832,7 @@ resolve_gnu_ifunc (const char *function_
#define BUILD_ID_VERBOSE_NONE 0
#define BUILD_ID_VERBOSE_FILENAMES 1
#define BUILD_ID_VERBOSE_BINARY_PARSE 2
-static int build_id_verbose = BUILD_ID_VERBOSE_FILENAMES;
+static int build_id_verbose = BUILD_ID_VERBOSE_NONE;
static void
show_build_id_verbose (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
@@ -1920,8 +1920,10 @@ find_separate_debug_file_by_buildid (str
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/* Prevent looping on a stripped .debug file. */
if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0)
{
+#if 0 /* RHEL-5 backward behavior compatibility. */
warning (_("\"%s\": separate debug info file has no debug info"),
build_id_name);
+#endif
xfree (build_id_name);
}
else if (build_id_name != NULL)
Index: gdb-7.2.50.20110104/gdb/corelow.c
===================================================================
--- gdb-7.2.50.20110104.orig/gdb/corelow.c 2011-01-04 06:15:57.000000000 +0100
+++ gdb-7.2.50.20110104/gdb/corelow.c 2011-01-04 06:18:08.000000000 +0100
@@ -280,7 +280,7 @@ add_to_thread_list (bfd *abfd, asection
inferior_ptid = ptid; /* Yes, make it current. */
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}
-static int build_id_core_loads = 1;
+static int build_id_core_loads = 0;
static void
build_id_locate_exec (int from_tty)
Index: gdb-7.2.50.20110104/gdb/linux-nat.c
===================================================================
--- gdb-7.2.50.20110104.orig/gdb/linux-nat.c 2011-01-04 06:15:59.000000000 +0100
+++ gdb-7.2.50.20110104/gdb/linux-nat.c 2011-01-04 06:17:54.000000000 +0100
@@ -1762,8 +1762,22 @@ GPT: lwp %s had signal %s, but it is in
target_signal_to_string (signo));
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}
- if (*status == 0 && GET_PID (lp->ptid) == pid_was_stopped)
- *status = W_STOPCODE (SIGSTOP);
+ /* Workaround RHEL-5 kernel which has unreliable PTRACE_DETACH, SIGSTOP (that
+ many TIDs are left unstopped). See RH Bug 496732. */
+ if (GET_PID (lp->ptid) == pid_was_stopped)
+ {
+ int err;
+
+ errno = 0;
+ err = kill_lwp (GET_LWP (lp->ptid), SIGSTOP);
+ if (debug_linux_nat)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "SC: lwp kill %d %s\n",
+ err,
+ errno ? safe_strerror (errno) : "ERRNO-OK");
+ }
+ }
return 0;
}