Fix attach/core-load of {,un}prelinked i386 libs (bugreport by Michal Toman).
Fix threading internal error on corrupted memory (BZ 677654).
This commit is contained in:
parent
5bf2ffefc9
commit
89365c2014
155
gdb-core-thread-internalerr-1of3.patch
Normal file
155
gdb-core-thread-internalerr-1of3.patch
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@ -0,0 +1,155 @@
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http://sourceware.org/ml/gdb-patches/2011-02/msg00679.html
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Subject: Re: [patch 1/3] Code cleanup: gdb.threads/gcore-thread.exp
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On Thu, 24 Feb 2011 08:20:09 +0100, Joel Brobecker wrote:
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> Just a thought: Do we really need to worry about restoring
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> the timeout at the end of the testcase, given that this is
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> automatically done at the start of each testcase (see gdb.exp:
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> gdb_init)?
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I see now:
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Re: [RFA/testsuite] Reset the timeout duration at the start of each testcase.
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http://sourceware.org/ml/gdb-patches/2010-02/msg00202.html
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commit 501c57da40fd27c8036a5fc995f750b0559272ad
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Patch updated.
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Thanks,
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Jan
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gdb/testsuite/
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2011-02-24 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.threads/gcore-thread.exp ($testfile): Match it the .exp
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filename.
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($srcfile): Preserve the original value.
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($testfile): Match it the .exp filename.
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($corefile): New variable. Substitute it around.
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Use clean_restart.
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($prev_timeout): Remove.
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(load_core): Move core loading into this proc.
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Fix restore of $timeout if load_core fails.
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Index: gdb-7.2/gdb/testsuite/gdb.threads/gcore-thread.exp
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===================================================================
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--- gdb-7.2.orig/gdb/testsuite/gdb.threads/gcore-thread.exp 2011-02-24 09:56:04.000000000 +0100
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+++ gdb-7.2/gdb/testsuite/gdb.threads/gcore-thread.exp 2011-02-24 09:56:57.000000000 +0100
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@@ -21,11 +21,11 @@ if $tracelevel then {
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strace $tracelevel
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}
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-
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# Single-threaded test case
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-set testfile "pthreads"
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-set srcfile ${testfile}.c
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-set binfile ${objdir}/${subdir}/gcore-${testfile}
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+set testfile "gcore-thread"
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+set srcfile pthreads.c
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+set binfile ${objdir}/${subdir}/${testfile}
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+set corefile ${objdir}/${subdir}/${testfile}.test
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if [istarget "*-*-linux"] then {
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set target_cflags "-D_MIT_POSIX_THREADS"
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@@ -41,10 +41,7 @@ if {[gdb_compile_pthreads "${srcdir}/${s
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# Start with a fresh gdb.
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-gdb_exit
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-gdb_start
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-gdb_reinitialize_dir $srcdir/$subdir
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-gdb_load ${binfile}
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+clean_restart ${testfile}
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# regexp for "horizontal" text (i.e. doesn't include newline or
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# carriage return)
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@@ -66,7 +63,6 @@ proc pthread_self {name} {
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return ""
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}
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-set prev_timeout $timeout
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set timeout 30
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gdb_test_multiple "help gcore" "help gcore" {
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@@ -109,10 +105,9 @@ gdb_breakpoint "thread2"
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gdb_test "continue" "Continuing.*Breakpoint.* thread2 .*" "thread 2 is running"
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set thread2_self [pthread_self thread2]
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-set escapedfilename [string_to_regexp ${objdir}/${subdir}/gcore.test]
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+set escapedfilename [string_to_regexp $corefile]
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# Drop corefile
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-gdb_test_multiple "gcore ${objdir}/${subdir}/gcore.test" \
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- "save a corefile" \
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+gdb_test_multiple "gcore $corefile" "save a corefile" \
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{
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-re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
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pass "save a corefile"
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@@ -131,31 +126,38 @@ if {!$core_supported} {
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return -1
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}
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+
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# Now restart gdb and load the corefile.
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-gdb_exit
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-gdb_start
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-gdb_reinitialize_dir $srcdir/$subdir
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-gdb_load ${binfile}
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-
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-gdb_test_multiple "core ${objdir}/${subdir}/gcore.test" \
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- "re-load generated corefile" {
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- -re ".* is not a core dump:.*$gdb_prompt $" {
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- fail "re-load generated corefile (bad file format)"
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- # No use proceeding from here.
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- return;
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- }
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- -re ".*: No such file or directory.*$gdb_prompt $" {
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- fail "re-load generated corefile (file not found)"
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- # No use proceeding from here.
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- return;
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- }
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- -re ".*Couldn't find .* registers in core file.*$gdb_prompt $" {
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- fail "re-load generated corefile (incomplete note section)"
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- }
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- -re "Core was generated by .*$gdb_prompt $" {
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- pass "re-load generated corefile"
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+clean_restart ${testfile}
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+
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+proc load_core { corefile } {
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+ global gdb_prompt
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+
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+ gdb_test_multiple "core $corefile" \
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+ "re-load generated corefile" {
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+ -re " is not a core dump:.*\r\n$gdb_prompt $" {
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+ fail "re-load generated corefile (bad file format)"
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+ # No use proceeding from here.
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+ return 0;
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+ }
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+ -re ": No such file or directory.*\r\n$gdb_prompt $" {
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+ fail "re-load generated corefile (file not found)"
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+ # No use proceeding from here.
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+ return 0;
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+ }
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+ -re "Couldn't find .* registers in core file.*\r\n$gdb_prompt $" {
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+ fail "re-load generated corefile (incomplete note section)"
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+ }
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+ -re "Core was generated by .*\r\n$gdb_prompt $" {
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+ pass "re-load generated corefile"
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+ }
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}
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- }
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+ return 1
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+}
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+
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+if ![load_core $corefile] {
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+ return
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+}
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# FIXME: now what can we test about the thread state?
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# We do not know for certain that there should be at least
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@@ -181,5 +183,3 @@ if [istarget "*-*-linux*"] then {
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gdb_test "info threads" "Thread $thread1_self .*" "thread1 pthread_self found"
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gdb_test "info threads" "Thread $thread2_self .*" "thread2 pthread_self found"
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}
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-
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-set timeout $prev_timeout
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105
gdb-core-thread-internalerr-2of3.patch
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105
gdb-core-thread-internalerr-2of3.patch
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@ -0,0 +1,105 @@
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http://sourceware.org/ml/gdb-patches/2011-02/msg00680.html
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Subject: [patch 2/3] Fix threading internal error on corrupted memory [rediff]
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[rediff]
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gdb/
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2011-02-24 Jan Kratochvil <jan.kratochvil@redhat.com>
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* linux-thread-db.c (find_new_threads_callback): Exit on zero TI_TID
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even if !TARGET_HAS_EXECUTION.
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gdb/testsuite/
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2011-02-24 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.threads/gcore-thread.exp ($core0file): New variable.
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(clear __stack_user.next, clear stack_used.next)
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(save a zeroed-threads corefile): New test.
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Call core_load for $core0file.
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(zeroed-threads cannot be listed): New test.
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Index: gdb-7.2/gdb/linux-thread-db.c
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===================================================================
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--- gdb-7.2.orig/gdb/linux-thread-db.c 2011-02-24 09:56:04.000000000 +0100
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+++ gdb-7.2/gdb/linux-thread-db.c 2011-02-24 09:57:12.000000000 +0100
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@@ -1321,7 +1321,7 @@ find_new_threads_callback (const td_thrh
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if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
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return 0; /* A zombie -- ignore. */
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- if (ti.ti_tid == 0 && target_has_execution)
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+ if (ti.ti_tid == 0)
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{
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/* A thread ID of zero means that this is the main thread, but
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glibc has not yet initialized thread-local storage and the
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@@ -1333,10 +1333,13 @@ find_new_threads_callback (const td_thrh
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need this glibc bug workaround. */
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info->need_stale_parent_threads_check = 0;
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- err = info->td_thr_event_enable_p (th_p, 1);
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- if (err != TD_OK)
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- error (_("Cannot enable thread event reporting for LWP %d: %s"),
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- (int) ti.ti_lid, thread_db_err_str (err));
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+ if (target_has_execution)
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+ {
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+ err = info->td_thr_event_enable_p (th_p, 1);
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+ if (err != TD_OK)
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+ error (_("Cannot enable thread event reporting for LWP %d: %s"),
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+ (int) ti.ti_lid, thread_db_err_str (err));
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+ }
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return 0;
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}
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Index: gdb-7.2/gdb/testsuite/gdb.threads/gcore-thread.exp
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===================================================================
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--- gdb-7.2.orig/gdb/testsuite/gdb.threads/gcore-thread.exp 2011-02-24 09:56:57.000000000 +0100
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+++ gdb-7.2/gdb/testsuite/gdb.threads/gcore-thread.exp 2011-02-24 09:57:27.000000000 +0100
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@@ -26,6 +26,7 @@ set testfile "gcore-thread"
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set srcfile pthreads.c
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set binfile ${objdir}/${subdir}/${testfile}
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set corefile ${objdir}/${subdir}/${testfile}.test
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+set core0file ${objdir}/${subdir}/${testfile}0.test
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if [istarget "*-*-linux"] then {
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set target_cflags "-D_MIT_POSIX_THREADS"
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@@ -127,6 +128,29 @@ if {!$core_supported} {
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}
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+# Test the uninitialized thread list.
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+# Provide the case of glibc td_thr_get_info handling of:
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+# /* Special case for the main thread before initialization. */
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+
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+foreach symbol {__stack_user stack_used} {
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+ set test "clear ${symbol}.next"
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+ gdb_test_multiple "p *(void **) &${symbol} = 0" $test {
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+ -re " = \\(void \\*\\) 0x0\r\n$gdb_prompt $" {
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+ pass $test
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+ }
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+ -re "No symbol \"${symbol}\" in current context\\.\r\n$gdb_prompt $" {
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+ xfail $test
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+ # Do not do the verification.
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+ set core0file ""
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+ }
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+ }
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+}
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+
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+if {"$core0file" != ""} {
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+ gdb_test "gcore $core0file" "Saved corefile .*" "save a zeroed-threads corefile"
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+}
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+
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+
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# Now restart gdb and load the corefile.
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clean_restart ${testfile}
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@@ -183,3 +207,11 @@ if [istarget "*-*-linux*"] then {
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gdb_test "info threads" "Thread $thread1_self .*" "thread1 pthread_self found"
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gdb_test "info threads" "Thread $thread2_self .*" "thread2 pthread_self found"
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}
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+
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+
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+# Test the uninitialized thread list.
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+
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+if {"$core0file" != "" && [load_core $core0file]} {
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+
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+ gdb_test "info threads" "Cannot find new threads: .*" "zeroed-threads cannot be listed"
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+}
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99
gdb-core-thread-internalerr-3of3.patch
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99
gdb-core-thread-internalerr-3of3.patch
Normal file
@ -0,0 +1,99 @@
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http://sourceware.org/ml/gdb-patches/2011-02/msg00675.html
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Subject: [patch 3/3] Display core reasons even during thread error
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Hi,
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this is mostly unrelated. But after the patch 2/3 it will still FAIL:
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Loaded symbols for /lib64/ld-linux-x86-64.so.2
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Cannot find new threads: debugger service failed
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(gdb) FAIL: gdb.threads/gcore-thread.exp: re-load generated corefile
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as it is a common bug I dislike for years I have fixed it here:
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Loaded symbols for /lib64/ld-linux-x86-64.so.2
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Cannot find new threads: debugger service failed
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Core was generated by `.../gdb/testsuite/gdb.threads/gcore-thread'.
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Program terminated with signal 5, Trace/breakpoint trap.
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#0 thread2 (arg=0xdeadbeef) at ./gdb.threads/pthreads.c:91
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91 int k = 0;
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(gdb) PASS: gdb.threads/gcore-thread.exp: re-load generated corefile
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No regressions on {x86_64,x86_64-m32,i686}-fedora15-linux-gnu.
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Thanks,
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Jan
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gdb/
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2011-02-24 Jan Kratochvil <jan.kratochvil@redhat.com>
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* corelow.c: Include wrapper.h.
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(core_open): Call now gdb_target_find_new_threads.
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* wrapper.c: Include target.h.
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(gdb_target_find_new_threads): New.
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* wrapper.h (gdb_target_find_new_threads): New declaration.
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--- a/gdb/corelow.c
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+++ b/gdb/corelow.c
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@@ -47,6 +47,7 @@
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#include "auxv.h"
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#include "elf/common.h"
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#include "gdbcmd.h"
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+#include "wrapper.h"
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#ifndef O_LARGEFILE
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@@ -428,7 +429,7 @@ core_open (char *filename, int from_tty)
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may be a thread_stratum target loaded on top of target core by
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now. The layer above should claim threads found in the BFD
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sections. */
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- target_find_new_threads ();
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+ gdb_target_find_new_threads ();
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p = bfd_core_file_failing_command (core_bfd);
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if (p)
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--- a/gdb/wrapper.c
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+++ b/gdb/wrapper.c
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@@ -21,6 +21,7 @@
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#include "exceptions.h"
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#include "wrapper.h"
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#include "ui-out.h"
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+#include "target.h"
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int
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gdb_parse_exp_1 (char **stringptr, struct block *block, int comma,
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@@ -161,3 +162,24 @@ gdb_value_struct_elt (struct ui_out *uiout, struct value **result,
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return GDB_RC_FAIL;
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return GDB_RC_OK;
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}
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+
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+/* Call target_find_new_threads without throwing exception. Exception is
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+ printed if it got thrown. */
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+
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+int
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+gdb_target_find_new_threads (void)
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+{
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+ volatile struct gdb_exception except;
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+
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+ TRY_CATCH (except, RETURN_MASK_ERROR)
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+ {
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+ target_find_new_threads ();
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+ }
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+
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+ if (except.reason < 0)
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+ {
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+ exception_print (gdb_stderr, except);
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+ return 0;
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+ }
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+ return 1;
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+}
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--- a/gdb/wrapper.h
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+++ b/gdb/wrapper.h
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@@ -48,4 +48,6 @@ extern int gdb_value_ind (struct value *val, struct value ** rval);
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extern int gdb_parse_and_eval_type (char *, int, struct type **);
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+extern int gdb_target_find_new_threads (void);
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+
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#endif /* wrapper.h */
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|
141
gdb-prelink-rela.patch
Normal file
141
gdb-prelink-rela.patch
Normal file
@ -0,0 +1,141 @@
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http://sourceware.org/ml/gdb-patches/2011-02/msg00630.html
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Subject: [patch] [i386] Fix {,un}prelinked libraries for attach/core-load
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Hi,
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please see comments in the patch. The adjusted testcase FAILs on i386.
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||||
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"Prelink", March 4, 2004 - by Jakub Jelinek:
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http://people.redhat.com/jakub/prelink.pdf
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primarily section 7 - REL to RELA conversion
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||||
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||||
An example of unprelinked -> prelinked library change:
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||||
Program Headers:
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Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
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||||
- LOAD 0x000000 0x00000000 0x00000000 0x00538 0x00538 R E 0x1000
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- LOAD 0x000538 0x00001538 0x00001538 0x00100 0x00110 RW 0x1000
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- DYNAMIC 0x000550 0x00001550 0x00001550 0x000c8 0x000c8 RW 0x4
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- NOTE 0x0000f4 0x000000f4 0x000000f4 0x00024 0x00024 R 0x4
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- GNU_EH_FRAME 0x0004e8 0x000004e8 0x000004e8 0x00014 0x00014 R 0x4
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+ LOAD 0x000000 0x411b3000 0x411b3000 0x00558 0x00558 R E 0x1000
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+ LOAD 0x000558 0x411b4558 0x411b4558 0x00100 0x00110 RW 0x1000
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+ DYNAMIC 0x000570 0x411b4570 0x411b4570 0x000c8 0x000c8 RW 0x4
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+ NOTE 0x0000f4 0x411b30f4 0x411b30f4 0x00024 0x00024 R 0x4
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+ GNU_EH_FRAME 0x000508 0x411b3508 0x411b3508 0x00014 0x00014 R 0x4
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GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4
|
||||
|
||||
So far GDB expected all such displacements will be always PAGE_SIZE aligned.
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This applies for example for re-prelinking of an already prelinked file.
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But it does not apply for prelinking of an unprelinked file or unprelinking of
|
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a prelinked file, there can be arbitrary displacement.
|
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|
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It affects i386 (=i686, prelink doc reports also ARM and MIPS) which uses REL.
|
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x86_64 always uses RELA, therefore I have not noticed it so far. i386 still
|
||||
has to be supported.
|
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|
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This affects both attachment to a PID and core file loads.
|
||||
|
||||
This applies in real world if you transfer a core file between hosts and try to
|
||||
backtrace them, libraries of both hosts may differ whether they are / are not
|
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prelinked.
|
||||
|
||||
I could implement some (displacement-forgiving and prelink-modifications
|
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forgiving) comparison of both DYNAMIC segments found. But I do not think it is
|
||||
useful, if the DYNAMIC address from linkmap vs. bfd do not match it is still a
|
||||
better chance to try a displacement to make them match. Keeping the file
|
||||
relocation cannot work anyway when the DYNAMIC address is verified as wrong.
|
||||
|
||||
No regressions on {x86_64,x86_64-m32,i686}-fedora15-linux-gnu.
|
||||
|
||||
Mostly do you agree the DYNAMIC content does not have to be verifed?
|
||||
Do you have any comments on the in-code long comments?
|
||||
|
||||
|
||||
Thanks,
|
||||
Jan
|
||||
|
||||
|
||||
gdb/
|
||||
2011-02-22 Jan Kratochvil <jan.kratochvil@redhat.com>
|
||||
|
||||
Fix libraries displacement if they change whether they were prelinked.
|
||||
* solib-svr4.c (LM_ADDR_CHECK): Set L_ADDR even if the DYNAMIC pointer
|
||||
does not match. Comment why.
|
||||
|
||||
gdb/testsuite/
|
||||
2011-02-22 Jan Kratochvil <jan.kratochvil@redhat.com>
|
||||
|
||||
* gdb.base/break-interp-lib.c (v, vptr): New variables.
|
||||
* gdb.base/break-interp.exp (test_attach): New comment.
|
||||
|
||||
--- a/gdb/solib-svr4.c
|
||||
+++ b/gdb/solib-svr4.c
|
||||
@@ -237,11 +237,11 @@ LM_ADDR_CHECK (struct so_list *so, bfd *abfd)
|
||||
|
||||
Even on PPC it must be zero-aligned at least for MINPAGESIZE. */
|
||||
|
||||
+ l_addr = l_dynaddr - dynaddr;
|
||||
+
|
||||
if ((l_addr & (minpagesize - 1)) == 0
|
||||
&& (l_addr & align) == ((l_dynaddr - dynaddr) & align))
|
||||
{
|
||||
- l_addr = l_dynaddr - dynaddr;
|
||||
-
|
||||
if (info_verbose)
|
||||
printf_unfiltered (_("Using PIC (Position Independent Code) "
|
||||
"prelink displacement %s for \"%s\".\n"),
|
||||
@@ -249,9 +249,20 @@ LM_ADDR_CHECK (struct so_list *so, bfd *abfd)
|
||||
so->so_name);
|
||||
}
|
||||
else
|
||||
- warning (_(".dynamic section for \"%s\" "
|
||||
- "is not at the expected address "
|
||||
- "(wrong library or version mismatch?)"), so->so_name);
|
||||
+ {
|
||||
+ /* There is no way to verify the library file matches. prelink
|
||||
+ can during prelinking of an unprelinked file (or unprelinking
|
||||
+ of a prelinked file) shift the DYNAMIC segment by arbitrary
|
||||
+ offset without any page size alignment. There is no way to
|
||||
+ find out the ELF header and/or Program Headers for a limited
|
||||
+ verification if it they match. One could do a verification
|
||||
+ of the DYNAMIC segment. Still the found address is the best
|
||||
+ one GDB could find. */
|
||||
+
|
||||
+ warning (_(".dynamic section for \"%s\" "
|
||||
+ "is not at the expected address "
|
||||
+ "(wrong library or version mismatch?)"), so->so_name);
|
||||
+ }
|
||||
}
|
||||
|
||||
set_addr:
|
||||
--- a/gdb/testsuite/gdb.base/break-interp-lib.c
|
||||
+++ b/gdb/testsuite/gdb.base/break-interp-lib.c
|
||||
@@ -20,6 +20,10 @@
|
||||
#include <assert.h>
|
||||
#include <stdio.h>
|
||||
|
||||
+/* Force REL->RELA conversion on i386, see "Prelink", March 4, 2004. */
|
||||
+volatile int v[2];
|
||||
+volatile int *vptr = &v[1];
|
||||
+
|
||||
void
|
||||
libfunc (const char *action)
|
||||
{
|
||||
--- a/gdb/testsuite/gdb.base/break-interp.exp
|
||||
+++ b/gdb/testsuite/gdb.base/break-interp.exp
|
||||
@@ -352,6 +352,14 @@ proc test_attach {file displacement {relink_args ""}} {
|
||||
# test simplicity, we merged this test and the test above by not
|
||||
# restoring $INTERP after $EXEC prelink. $INTERP gets restored
|
||||
# later below.
|
||||
+ #
|
||||
+ # `(wrong library or version mismatch?)' messages are printed for
|
||||
+ # $binfile_lib on platforms converting REL->RELA relocations by
|
||||
+ # prelink (such as on i386). There is no reliable way to verify
|
||||
+ # the library file matches the running library in such case but
|
||||
+ # GDB at least attempts to set the right displacement. We test
|
||||
+ # `libfunc' is present in the backtrace and therefore the
|
||||
+ # displacement has been guessed right.
|
||||
|
||||
if [prelink$relink $relink_args [file tail $exec]] {
|
||||
# /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
|
||||
|
18
gdb.spec
18
gdb.spec
@ -27,7 +27,7 @@ Version: 7.2
|
||||
|
||||
# The release always contains a leading reserved number, start it at 1.
|
||||
# `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
|
||||
Release: 44%{?_with_upstream:.upstream}%{dist}
|
||||
Release: 45%{?_with_upstream:.upstream}%{dist}
|
||||
|
||||
License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and GFDL and BSD and Public Domain
|
||||
Group: Development/Debuggers
|
||||
@ -735,6 +735,14 @@ Patch565: gdb-physname-pr11734-1of2.patch
|
||||
Patch566: gdb-physname-pr11734-2of2.patch
|
||||
Patch567: gdb-physname-pr12273.patch
|
||||
|
||||
# Fix attach/core-load of {,un}prelinked i386 libs (bugreport by Michal Toman).
|
||||
Patch571: gdb-prelink-rela.patch
|
||||
|
||||
# Fix threading internal error on corrupted memory (BZ 677654).
|
||||
Patch572: gdb-core-thread-internalerr-1of3.patch
|
||||
Patch573: gdb-core-thread-internalerr-2of3.patch
|
||||
Patch574: gdb-core-thread-internalerr-3of3.patch
|
||||
|
||||
BuildRequires: ncurses-devel%{?_isa} texinfo gettext flex bison expat-devel%{?_isa}
|
||||
Requires: readline%{?_isa}
|
||||
BuildRequires: readline-devel%{?_isa}
|
||||
@ -1050,6 +1058,10 @@ rm -f gdb/jv-exp.c gdb/m2-exp.c gdb/objc-exp.c gdb/p-exp.c
|
||||
%patch565 -p1
|
||||
%patch566 -p1
|
||||
%patch567 -p1
|
||||
%patch571 -p1
|
||||
%patch572 -p1
|
||||
%patch573 -p1
|
||||
%patch574 -p1
|
||||
|
||||
%patch390 -p1
|
||||
%patch393 -p1
|
||||
@ -1447,6 +1459,10 @@ fi
|
||||
%endif
|
||||
|
||||
%changelog
|
||||
* Thu Feb 24 2011 Jan Kratochvil <jan.kratochvil@redhat.com> - 7.2-45.fc14
|
||||
- Fix attach/core-load of {,un}prelinked i386 libs (bugreport by Michal Toman).
|
||||
- Fix threading internal error on corrupted memory (BZ 677654).
|
||||
|
||||
* Mon Feb 21 2011 Jan Kratochvil <jan.kratochvil@redhat.com> - 7.2-44.fc14
|
||||
- Fix C++ operators resolving through typedefs (STL from gcc-4.5, BZ 678454).
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user