Add cwd/set_cwd to the inferior class, remove set_inferior_args.
Keep get_inferior_args, because it is used from fork_inferior, in shared
code. The cwd could eventually be passed as a parameter eventually,
though, I think that would be cleaner.
Change-Id: Ifb72ea865d7e6f9a491308f0d5c1595579d8427e
Add args/set_args to the inferior class, remove the set_inferior_args
and get_inferior_args functions, that would just be wrappers around
them.
Change-Id: If87d52f3402ce08be26c32897ae8915d9f6d1ea3
There are currently two states that the inferior args can be stored.
The main one is the `args` field, where they are stored as a single
string. The other one is the `argc`/`argv` fields.
This last one is only used for arguments passed in GDB's
command line. And the only outcome is that when get_inferior_args is
called, `argc`/`argv` are serialized into `args`. So really,
`argc`/`argv` is just a staging area before moving the arguments in
`args`.
Simplify this by only keeping the `args` field. Change
set_inferior_args_vector to immediately serialize the arguments into
`args`, work that would be done in get_inferior_args later anyway.
The only time where this work would be "wasted" is when the user passes
some arguments on the command line, but does not end up running the
program. But that just seems unlikely. And it's not that much work.
Change-Id: Ica0b9859397c095f6530350c8fb3c36905f2044a
The declaration of set_inferior_cwd is currently shared between gdb and
gdbserver, in gdbsupport/common-inferior.h. It doesn't need to be, as
set_inferior_cwd is not called from common code. Only get_inferior_cwd
needs to.
The motivation for this is that a future patch will change the prototype
of set_inferior_cwd in gdb, and I don't want to change it for gdbserver
unnecessarily. I see this as a good cleanup in any case, to reduce to
just the essential what is shared between GDB and GDBserver.
Change-Id: I3127d27d078f0503ebf5ccc6fddf14f212426a73
Fix:
DUPLICATE: gdb.base/setshow.exp: test_setshow_args: show args
by giving some explicit test names.
Change-Id: I2a738d3d3675ab9b45929e71f5aee0ea6bf92072
Split in multiple procs, one per topic, and start with a fresh GDB in
each. I find it easier to work on a test with multiple smaller
independent test procedures. For example, it's possible to comment all
but one when working on one. It's also easier to add things without
having to think about the impact on existing tests, and vice-versa.
Change-Id: I19691eed8f9bcb975b2eeff7577cac66251bcbe2
Using save_vars is a bit better than what we have now, as it ensures the
variable gets restored if the code within it throws an error.
Change-Id: I3bd6836e5b7efb61b078acadff1a1c8182c19a27
Split the file into multiple independent test procs, where each proc
starts with a fresh GDB. I find it easier to understand what a test is
doing when each part of the test is isolated and self-contained. It
makes it easier to comment out some parts of the test while working /
debugging a specific part. It also makes it easier to add new things
(which a subsequent patch will do) without fear of impacting another part
of the test.
Change-Id: I8b4d52ac82b1492d79b679e13914ed177d8a836d
Not all systems have hardware breakpoint support. Add a check
to see if the system supports hardware breakpoints.
gdb/testsuite/ChangeLog
* gdb.python/py-breakpoint.exp (test_hardware_breakpoints): Add
check for hardware breakpoint support.
In spawn_capture_tty_name (lib/gdb.exp) we either set or unset
last_spawn_tty_name depending on whether spawn_out(slave,name) exists
or not.
One situation that might cause spawn_out(slave,name) to not exists is
if the spawn function is called with the argument -leaveopen, which is
how it is called when processes are created as part of a pipeline, the
created process has no tty, instead its output is written to a file
descriptor.
If a pipeline is created consisting of multiple processes then there
will be multiple sequential calls to spawn, all using -leaveopen. The
first of these calls is fine, spawn_out(slave,name) is not set, and so
in spawn_capture_tty_name we unset last_spawn_tty_name. However, on
the second call to spawn, spawn_out(slave,name) is still not set and
so in spawn_capture_tty_name we again try to unset
last_spawn_tty_name, this now throws an error (as last_spawn_tty_name
is already unset).
Fix this issue by using -nocomplain with the call to unset in
spawn_capture_tty_name.
Before this commit I was seeing gdb.base/gnu-debugdata.exp report 1
pass, and 1 unsupported test. After this commit I now see 16 passes
from this test script.
I have also improved the code that used to do this:
if { [info exists spawn_out] } {
set ::last_spawn_tty_name $spawn_out(slave,name)
} else {
...
}
The problem here is that we check for the existence of spawn_out, and
then unconditionally read spawn_out(slave,name). A situation could
arise where some other element of spawn_out is set,
e.g. spawn_out(foo), in which case we would enter the if block and try
to read a non-existent variable. After this commit we now check
specifically for spawn_out(slave,name).
Finally, it is worth noting that before this issue was fixed runtest
itself, or rather the expect process behind runtest, would segfault
while exiting. I haven't looked at all into what the problem is here
that caused expect to crash, as fixing the bug in GDB's testing
scripts made the segfault go away.
While EVEX.L'L are indeed ignored when EVEX.b stands for just SAE,
EVEX.b itself is not ignored when an insn permits neither rounding
control nor SAE.
While changing this aspect of EVEX.b handling, also alter unduly set
embedded broadcast: Don't call BadOp(), screwing up subsequent
disassembly, but emit "{bad}" instead.
When running test-case gdb.ada/formatted_ref.exp with gcc-11 and target board
unix/gdb:debug_flags=-gdwarf-4 we run into:
...
(gdb) print/x s^M
No definition of "s" in current context.^M
(gdb) FAIL: gdb.ada/formatted_ref.exp: print/x s
...
which is caused by "runto defs.adb:20" taking us to defs__struct1IP:
...
(gdb) break defs.adb:20^M
Breakpoint 1 at 0x402cfd: defs.adb:20. (2 locations)^M
(gdb) run ^M
Starting program: formatted_ref ^M
^M
Breakpoint 1, defs__struct1IP () at defs.adb:20^M
20 return s.x; -- Set breakpoint marker here.^M
(gdb) print s1'access^M
...
instead of the expected defs.f1:
...
(gdb) break defs.adb:20^M
Breakpoint 1 at 0x402d0e: file defs.adb, line 20.^M
(gdb) run ^M
Starting program: formatted_ref ^M
^M
Breakpoint 1, defs.f1 (s=...) at defs.adb:20^M
20 return s.x; -- Set breakpoint marker here.^M
...
This is caused by incorrect line info due to gcc PR 101575 - "[gcc-11,
-gdwarf-4] Missing .file <n> directive causes invalid line info".
Fix this by when landing in defs__struct1IP:
- xfailing the runto, and
- issuing a continue to land in defs.f1.
Likewise in a few other test-cases.
Tested on x86_64-linux, with:
- system gcc.
- gcc-11 and target boards unix/gdb:debug_flags=-gdwarf-4 and
unix/gdb:debug_flags=-gdwarf-5.
gdb/testsuite/ChangeLog:
2021-07-22 Tom de Vries <tdevries@suse.de>
* gdb.ada/formatted_ref.exp: Add xfail for PR gcc/101575.
* gdb.ada/iwide.exp: Same.
* gdb.ada/pkd_arr_elem.exp: Same.
Their sole use is for {,V}EXTRACTPS / {,V}P{EXT,INS}RB respectively; for
consistency also limit use of dqw_mode to Jdqw. 64-bit disassembly
reflecting REX.W / VEX.W is not in line with the assembler's opcode
table having NoRex64 / VexWIG in all respective templates, i.e. assembly
input isn't being honored there either. Obviously the 0FC5 encodings of
{,V}PEXTRW then also need adjustment for consistency reasons.
It has only a single use and can easily be represented by dq_mode
instead. Plus its handling in intel_operand_size() was duplicating
that of vex_vsib_{d,q}_w_dq_mode anyway.
Unlike the high bit of VEX.vvvv / EVEX.vvvv, EVEX.V' is not ignored
outside of 64-bit mode. Oddly enough there already are tests for these
cases, but their expectations were wrong. (This may have been based on
an old SDM version, where the restriction wasn't properly spelled out.)
What so far was OP_E_register() can be easily reused also for OP_G().
Add suitable parameters to the function and move the invocation of
swap_operand() to OP_E(). Adjust MOVSXD's first operand: There never was
a need to use movsxd_mode there, and its use gets in the way of the code
folding.
With EVEX.W clear the instruction doesn't ignore the rounding mode, but
(like for other insns without rounding semantics) EVEX.b set causes #UD.
Hence the handling of EVEX.W needs to be done when processing
evex_rounding_64_mode, not at the decode stages.
Derive a new 64-bit testcase from the 32-bit one to cover the different
EVEX.W treatment in both cases.
When running test-case gdb.cp/step-and-next-inline.exp with gcc-11, I run
into:
...
KPASS: gdb.cp/step-and-next-inline.exp: no_header: next step 1 \
(PRMS symtab/25507)
FAIL: gdb.cp/step-and-next-inline.exp: no_header: next step 2
KPASS: gdb.cp/step-and-next-inline.exp: no_header: next step 3 \
(PRMS symtab/25507)
...
[ Note that I get the same result with gcc-11 and target board
unix/gdb:debug_flags=-gdwarf-4, so this is not a dwarf 4 vs 5 issue. ]
With gcc-10, I have this trace:
...
64 get_alias_set (&xx);
get_alias_set (t=0x601038 <xx>) at step-and-next-inline.cc:51
51 if (t != NULL
40 if (t->x != i)
52 && TREE_TYPE (t).z != 1
43 return x;
53 && TREE_TYPE (t).z != 2
43 return x;
54 && TREE_TYPE (t).z != 3)
43 return x;
main () at step-and-next-inline.cc:65
65 return 0;
...
and with gcc-11, I have instead:
...
64 get_alias_set (&xx);
get_alias_set (t=0x601038 <xx>) at step-and-next-inline.cc:51
51 if (t != NULL
52 && TREE_TYPE (t).z != 1
43 return x;
53 && TREE_TYPE (t).z != 2
43 return x;
54 && TREE_TYPE (t).z != 3)
43 return x;
main () at step-and-next-inline.cc:65
65 return 0;
...
and with clang-10, I have instead:
...
64 get_alias_set (&xx);
get_alias_set (t=0x601034 <xx>) at step-and-next-inline.cc:51
51 if (t != NULL
52 && TREE_TYPE (t).z != 1
53 && TREE_TYPE (t).z != 2
54 && TREE_TYPE (t).z != 3)
51 if (t != NULL
57 }
main () at step-and-next-inline.cc:65
65 return 0;
...
The test-case tries to verify that we don't step into inlined function
tree_check (lines 40-43) (so, with the clang trace we get that right).
The test-case then tries to kfail the problems when using gcc, but this is
done in such a way that the testing still gets out of sync after a failure.
That is: the "next step 2" check that is supposed to match
"TREE_TYPE (t).z != 2" is actually matching "TREE_TYPE (t).z != 1":
...
(gdb) next^M
52 && TREE_TYPE (t).z != 1^M
(gdb) PASS: gdb.cp/step-and-next-inline.exp: no_header: next step 2
...
Fix this by issuing extra nexts to arrive at the required lines.
Tested on x86_64-linux, with gcc-8, gcc-9, gcc-10, gcc-11, clang-8, clang-10
and clang-12.
gdb/testsuite/ChangeLog:
2021-07-20 Tom de Vries <tdevries@suse.de>
* gdb.cp/step-and-next-inline.cc (tree_check, get_alias_set, main):
Tag closing brace with comment.
* gdb.cp/step-and-next-inline.h: Update to keep identical with
step-and-next-inline.cc.
* gdb.cp/step-and-next-inline.exp: Issue extra next when required.
* ld.texi: Document new output section type.
* ldgram.y: Add new token.
* ldlang.c: Handle the new flag.
* ldlang.h: Add readonly_section to list of section types.
* ldlex.l: Add a new identifier.
* testsuite/ld-scripts/output-section-types.t: New example linker script.
* testsuite/ld-scripts/output-section-types.d: Test driver.
* testsyute/ld-scripts/script.exp: Run the new test.
When running test-case gdb.base/ptype-offsets.exp with gcc-11 (with -gdwarf-5
default) or gcc-10 with target board unix/gdb:debug_flags=-gdwarf-5 we run
into this regression:
...
(gdb) ptype/o static_member^M
/* offset | size */ type = struct static_member {^M
- static static_member Empty;^M
/* 0 | 4 */ int abc;^M
^M
/* total size (bytes): 4 */^M
}^M
-(gdb) PASS: gdb.base/ptype-offsets.exp: ptype/o static_member
+(gdb) FAIL: gdb.base/ptype-offsets.exp: ptype/o static_member
...
This is caused by missing debug info, which I filed as gcc PR101452 - "[debug,
dwarf-5] undefined static member removed by
-feliminate-unused-debug-symbols".
It's not clear yet whether this is a bug or a feature, but work around this in
the test-cases by:
- defining the static member
- adding additional_flags=-fno-eliminate-unused-debug-types.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2021-07-20 Tom de Vries <tdevries@suse.de>
* lib/gdb.exp (gcc_major_version): New proc.
* gdb.base/ptype-offsets.cc: Define static member static_member::Empty.
* gdb.cp/templates.exp: Define static member using -DGCC_BUG.
* gdb.cp/m-static.exp: Add
additional_flags=-fno-eliminate-unused-debug-types.
* gdb.cp/pr-574.exp: Same.
* gdb.cp/pr9167.exp: Same.
With gcc-11 we run into:
...
(gdb) print pa_ptr.all^M
That operation is not available on integers of more than 8 bytes.^M
(gdb) KFAIL: gdb.ada/arrayptr.exp: scenario=all: print pa_ptr.all (PRMS: gdb/20991)
...
This is due to PR exp/20991 - "__int128 type support". Mark this and similar
FAILs as KFAIL.
Also mark this FAIL:
....
(gdb) print pa_ptr(3)^M
cannot subscript or call something of type `foo__packed_array_ptr'^M
(gdb) FAIL: gdb.ada/arrayptr.exp: scenario=minimal: print pa_ptr(3)
...
as a KFAIL for PR ada/28115 - "Support packed array encoded as
DW_TAG_subrange_type".
Tested on x86_64-linux, with gcc-10 and gcc-11.
gdb/testsuite/ChangeLog:
2021-07-21 Tom de Vries <tdevries@suse.de>
* gdb.ada/arrayptr.exp: Add KFAILs for PR20991 and PR28115.
* gdb.ada/exprs.exp: Add KFAILs for PR20991.
* gdb.ada/packed_array_assign.exp: Same.
netbsdpe was deprecated in c2ce831330.
Since then, a release has passed (2.37), and it was marked obselete in
5c9cbf07f3. Unless I am mistaken, that
means we can now remove support altogether.
All branches in the "active" code are remove, and the target is
additionally marked as obsolete next to the other removed ones for
libbfd and gdb.
Per [1] from the NetBSD toolchain list, PE/COFF support was removed a
decade ago. Furthermore, the sole mention of this target in the binutils
commit history was in 2002. Together, I'm led to believe this target
hasn't seen much attention in quite a while.
[1]: https://mail-index.netbsd.org/tech-toolchain/2021/06/16/msg003996.html
bfd/
* config.bfd: Remove netbsdpe entry.
binutils/
* configure.ac: Remove netbsdpe entry.
* testsuite/lib/binutils-common.exp (is_pecoff_format): Likewise.
* configure: Regenerate.
gas/
* configure.tgt: Remove netbsdpe entry.
gdb/
* configure.tgt: Add netbsdpe to removed targets.
ld/
* configure.tgt: Remove netbsdpe entry.
* testsuite/ld-bootstrap/bootstrap.exp: Likewise.
When the architecture supports memory tagging, we handle
pointer/reference types in a special way, so we can validate tags and
show mismatches.
Unfortunately, the currently implementation errors out when the user
prints non-address values: composite types, floats, references, member
functions and other things.
Vector registers:
(gdb) p $v0
Value can't be converted to integer.
Non-existent internal variables:
(gdb) p $foo
Value can't be converted to integer.
The same happens for complex types and printing struct/union types.
There are a few problems here.
The first one is that after print_command_1 evaluates the expression
to print, the tag validation code call value_as_address
unconditionally, without making sure we have have a suitable type
where it makes to sense to call it. That results in value_as_address
(if it isn't given a pointer-like type) trying to treat the value as
an integer and convert it to an address, which #1 - doesn't make sense
(i.e., no sense in validating tags after "print 1"), and throws for
non-integer-convertible types. We fix this by making sure we have a
pointer or reference type first, and only if so then proceed to check
if the address-like value has tags.
The second is that we're calling value_as_address even if we have an
optimized out or unavailable value, which throws, because the value's
contents aren't fully accessible/readable. This error currently
escapes out and aborts the print. This case is fixed by checking for
optimized out / unavailable explicitly.
Third, the tag checking process does not gracefully handle exceptions.
If any exception is thrown from the tag validation code, we abort the
print. E.g., the target may fail to access tags via a running thread.
Or the needed /proc files aren't available. Or some other untold
reason. This is a bit too rigid. This commit changes print_command_1
to catch errors, print them, and still continue with the normal
expression printing path instead of erroring out and printing nothing
useful.
With this patch, printing works correctly again:
(gdb) p $v0
$1 = {d = {f = {2.0546950501119882e-81, 2.0546950501119882e-81}, u = {3399988123389603631, 3399988123389603631}, s = {
3399988123389603631, 3399988123389603631}}, s = {f = {1.59329203e-10, 1.59329203e-10, 1.59329203e-10, 1.59329203e-10}, u = {
791621423, 791621423, 791621423, 791621423}, s = {791621423, 791621423, 791621423, 791621423}}, h = {bf = {1.592e-10,
1.592e-10, 1.592e-10, 1.592e-10, 1.592e-10, 1.592e-10, 1.592e-10, 1.592e-10}, f = {0.11224, 0.11224, 0.11224, 0.11224, 0.11224,
0.11224, 0.11224, 0.11224}, u = {12079, 12079, 12079, 12079, 12079, 12079, 12079, 12079}, s = {12079, 12079, 12079, 12079,
12079, 12079, 12079, 12079}}, b = {u = {47 <repeats 16 times>}, s = {47 <repeats 16 times>}}, q = {u = {
62718710765820030520700417840365121327}, s = {62718710765820030520700417840365121327}}}
(gdb) p $foo
$2 = void
(gdb) p 2 + 2i
$3 = 2 + 2i
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28110
* Two add subset functions is redundant. Keep the riscv_add_implicit_subset,
and renamed it to riscv_add_subset. Besides, if the subset is added in order,
then we just add it at the tail of the subset list.
* Removed the "-march:" prefix from the error messages. Since not only the
-march= option will use the parser, but also the architecture elf attributes,
the default architecture setting and linker will use the same parser.
* Use a function, riscv_parse_check_conflicts, to check the conflicts
of extensions, including the rv64e and rv32q.
The rv32emc-elf/rv32i-elf/rv32gc-linux/rv64gc-elf/rv64gc-linux regressions
are tested and passed.
bfd/
* elfxx-riscv.c (riscv_lookup_subset): Check the subset tail list
first. If the subset is added in order, then we can just add it to
the tail without searching the whole list.
(riscv_add_subset): Replaced by riscv_add_implicit_subset.
(riscv_add_implicit_subset): Renamed to riscv_add_subset.
(riscv_parse_add_subset): Updated.
(riscv_parsing_subset_version): Removed the "-march:" prefix from
the error message.
(riscv_parse_prefixed_ext): Likewise.
(riscv_parse_std_ext): Likewise. And move the rv<xlen>e check
to riscv_parse_check_conflicts.
(riscv_parse_check_conflicts): New function used to check conflicts.
(riscv_parse_subset): Updated.
gas/
* testsuite/gas/riscv/march-fail-base-02.l: Updated.
* testsuite/gas/riscv/march-fail-unknown-std.l: Likewise.
As documented in bug 28086, test gdb.btrace/enable-new-thread.exp
started failing with commit 0618ae4149 ("gdb: optimize
all_matching_threads_iterator"):
(gdb) record btrace^M
(gdb) PASS: gdb.btrace/enable-new-thread.exp: record btrace
break 24^M
Breakpoint 2 at 0x555555555175: file /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.btrace/enable-new-thread.c, line 24.^M
(gdb) continue^M
Continuing.^M
/home/smarchi/src/binutils-gdb/gdb/inferior.c:303: internal-error: inferior* find_inferior_pid(process_stratum_target*, int): Assertion `pid != 0' failed.^M
A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
Quit this debugging session? (y or n) FAIL: gdb.btrace/enable-new-thread.exp: continue to breakpoint: cont to bp.1 (GDB internal error)
Note that I only see the failure if GDB is compiled without libipt
support. This is because GDB then makes use BTS instead of PT, so
exercises different code paths.
I think that the commit above just exposed an existing problem. The
stack trace of the internal error is:
#8 0x0000561cb81e404e in internal_error (file=0x561cb83aa2f8 "/home/smarchi/src/binutils-gdb/gdb/inferior.c", line=303, fmt=0x561cb83aa099 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55
#9 0x0000561cb7b5c031 in find_inferior_pid (targ=0x561cb8aafb60 <the_amd64_linux_nat_target>, pid=0) at /home/smarchi/src/binutils-gdb/gdb/inferior.c:303
#10 0x0000561cb7b5c102 in find_inferior_ptid (targ=0x561cb8aafb60 <the_amd64_linux_nat_target>, ptid=...) at /home/smarchi/src/binutils-gdb/gdb/inferior.c:317
#11 0x0000561cb7f1d1c3 in find_thread_ptid (targ=0x561cb8aafb60 <the_amd64_linux_nat_target>, ptid=...) at /home/smarchi/src/binutils-gdb/gdb/thread.c:487
#12 0x0000561cb7f1b921 in all_matching_threads_iterator::all_matching_threads_iterator (this=0x7ffc4ee34678, filter_target=0x561cb8aafb60 <the_amd64_linux_nat_target>, filter_ptid=...) at /home/smarchi/src/binutils-gdb/gdb/thread-iter.c:125
#13 0x0000561cb77bc462 in filtered_iterator<all_matching_threads_iterator, non_exited_thread_filter>::filtered_iterator<process_stratum_target* const&, ptid_t const&> (this=0x7ffc4ee34670) at /home/smarchi/src/binutils-gdb/gdb/../gdbsupport/filtered-iterator.h:42
#14 0x0000561cb77b97cb in all_non_exited_threads_range::begin (this=0x7ffc4ee34650) at /home/smarchi/src/binutils-gdb/gdb/thread-iter.h:243
#15 0x0000561cb7d8ba30 in record_btrace_target::record_is_replaying (this=0x561cb8aa6250 <record_btrace_ops>, ptid=...) at /home/smarchi/src/binutils-gdb/gdb/record-btrace.c:1411
#16 0x0000561cb7d8bb83 in record_btrace_target::xfer_partial (this=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_MEMORY, annex=0x0, readbuf=0x7ffc4ee34c58 "\260g\343N\374\177", writebuf=0x0, offset=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/record-btrace.c:1437
#17 0x0000561cb7ef73a9 in raw_memory_xfer_partial (ops=0x561cb8aa6250 <record_btrace_ops>, readbuf=0x7ffc4ee34c58 "\260g\343N\374\177", writebuf=0x0, memaddr=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/target.c:1504
#18 0x0000561cb7ef77da in memory_xfer_partial_1 (ops=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_CODE_MEMORY, readbuf=0x7ffc4ee34c58 "\260g\343N\374\177", writebuf=0x0, memaddr=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/target.c:1635
#19 0x0000561cb7ef78b5 in memory_xfer_partial (ops=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_CODE_MEMORY, readbuf=0x7ffc4ee34c58 "\260g\343N\374\177", writebuf=0x0, memaddr=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/target.c:1664
#20 0x0000561cb7ef7ba4 in target_xfer_partial (ops=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_CODE_MEMORY, annex=0x0, readbuf=0x7ffc4ee34c58 "\260g\343N\374\177", writebuf=0x0, offset=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/target.c:1721
#21 0x0000561cb7ef8503 in target_read_partial (ops=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_CODE_MEMORY, annex=0x0, buf=0x7ffc4ee34c58 "\260g\343N\374\177", offset=140737352774277, len=1, xfered_len=0x7ffc4ee34ad8) at /home/smarchi/src/binutils-gdb/gdb/target.c:1974
#22 0x0000561cb7ef861f in target_read (ops=0x561cb8aa6250 <record_btrace_ops>, object=TARGET_OBJECT_CODE_MEMORY, annex=0x0, buf=0x7ffc4ee34c58 "\260g\343N\374\177", offset=140737352774277, len=1) at /home/smarchi/src/binutils-gdb/gdb/target.c:2014
#23 0x0000561cb7ef809f in target_read_code (memaddr=140737352774277, myaddr=0x7ffc4ee34c58 "\260g\343N\374\177", len=1) at /home/smarchi/src/binutils-gdb/gdb/target.c:1869
#24 0x0000561cb7937f4d in gdb_disassembler::dis_asm_read_memory (memaddr=140737352774277, myaddr=0x7ffc4ee34c58 "\260g\343N\374\177", len=1, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/gdb/disasm.c:139
#25 0x0000561cb80ab66d in fetch_data (info=0x7ffc4ee34e88, addr=0x7ffc4ee34c59 "g\343N\374\177") at /home/smarchi/src/binutils-gdb/opcodes/i386-dis.c:194
#26 0x0000561cb80ab7e2 in ckprefix () at /home/smarchi/src/binutils-gdb/opcodes/i386-dis.c:8628
#27 0x0000561cb80adbd8 in print_insn (pc=140737352774277, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/opcodes/i386-dis.c:9587
#28 0x0000561cb80abe4f in print_insn_i386 (pc=140737352774277, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/opcodes/i386-dis.c:8894
#29 0x0000561cb7744a19 in default_print_insn (memaddr=140737352774277, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/gdb/arch-utils.c:1029
#30 0x0000561cb7b33067 in i386_print_insn (pc=140737352774277, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/gdb/i386-tdep.c:4013
#31 0x0000561cb7acd8f4 in gdbarch_print_insn (gdbarch=0x561cbae2fb60, vma=140737352774277, info=0x7ffc4ee34e88) at /home/smarchi/src/binutils-gdb/gdb/gdbarch.c:3478
#32 0x0000561cb793a32d in gdb_disassembler::print_insn (this=0x7ffc4ee34e80, memaddr=140737352774277, branch_delay_insns=0x0) at /home/smarchi/src/binutils-gdb/gdb/disasm.c:795
#33 0x0000561cb793a5b0 in gdb_print_insn (gdbarch=0x561cbae2fb60, memaddr=140737352774277, stream=0x561cb8ac99f8 <null_stream>, branch_delay_insns=0x0) at /home/smarchi/src/binutils-gdb/gdb/disasm.c:850
#34 0x0000561cb793a631 in gdb_insn_length (gdbarch=0x561cbae2fb60, addr=140737352774277) at /home/smarchi/src/binutils-gdb/gdb/disasm.c:859
#35 0x0000561cb77f53f4 in btrace_compute_ftrace_bts (tp=0x561cbba11210, btrace=0x7ffc4ee35188, gaps=...) at /home/smarchi/src/binutils-gdb/gdb/btrace.c:1107
#36 0x0000561cb77f55f5 in btrace_compute_ftrace_1 (tp=0x561cbba11210, btrace=0x7ffc4ee35180, cpu=0x0, gaps=...) at /home/smarchi/src/binutils-gdb/gdb/btrace.c:1527
#37 0x0000561cb77f5705 in btrace_compute_ftrace (tp=0x561cbba11210, btrace=0x7ffc4ee35180, cpu=0x0) at /home/smarchi/src/binutils-gdb/gdb/btrace.c:1560
#38 0x0000561cb77f583b in btrace_add_pc (tp=0x561cbba11210) at /home/smarchi/src/binutils-gdb/gdb/btrace.c:1589
#39 0x0000561cb77f5a86 in btrace_enable (tp=0x561cbba11210, conf=0x561cb8ac6878 <record_btrace_conf>) at /home/smarchi/src/binutils-gdb/gdb/btrace.c:1629
#40 0x0000561cb7d88d26 in record_btrace_enable_warn (tp=0x561cbba11210) at /home/smarchi/src/binutils-gdb/gdb/record-btrace.c:294
#41 0x0000561cb7c603dc in std::__invoke_impl<void, void (*&)(thread_info*), thread_info*> (__f=@0x561cbb6c4878: 0x561cb7d88cdc <record_btrace_enable_warn(thread_info*)>) at /usr/include/c++/10/bits/invoke.h:60
#42 0x0000561cb7c5e5a6 in std::__invoke_r<void, void (*&)(thread_info*), thread_info*> (__fn=@0x561cbb6c4878: 0x561cb7d88cdc <record_btrace_enable_warn(thread_info*)>) at /usr/include/c++/10/bits/invoke.h:153
#43 0x0000561cb7c5dc92 in std::_Function_handler<void (thread_info*), void (*)(thread_info*)>::_M_invoke(std::_Any_data const&, thread_info*&&) (__functor=..., __args#0=@0x7ffc4ee35310: 0x561cbba11210) at /usr/include/c++/10/bits/std_function.h:291
#44 0x0000561cb7f2600f in std::function<void (thread_info*)>::operator()(thread_info*) const (this=0x561cbb6c4878, __args#0=0x561cbba11210) at /usr/include/c++/10/bits/std_function.h:622
#45 0x0000561cb7f23dc8 in gdb::observers::observable<thread_info*>::notify (this=0x561cb8ac5aa0 <gdb::observers::new_thread>, args#0=0x561cbba11210) at /home/smarchi/src/binutils-gdb/gdb/../gdbsupport/observable.h:150
#46 0x0000561cb7f1c436 in add_thread_silent (targ=0x561cb8aafb60 <the_amd64_linux_nat_target>, ptid=...) at /home/smarchi/src/binutils-gdb/gdb/thread.c:263
#47 0x0000561cb7f1c479 in add_thread_with_info (targ=0x561cb8aafb60 <the_amd64_linux_nat_target>, ptid=..., priv=0x561cbb3f7ab0) at /home/smarchi/src/binutils-gdb/gdb/thread.c:272
#48 0x0000561cb7bfa1d0 in record_thread (info=0x561cbb0413a0, tp=0x0, ptid=..., th_p=0x7ffc4ee35610, ti_p=0x7ffc4ee35620) at /home/smarchi/src/binutils-gdb/gdb/linux-thread-db.c:1380
#49 0x0000561cb7bf7a2a in thread_from_lwp (stopped=0x561cba81db20, ptid=...) at /home/smarchi/src/binutils-gdb/gdb/linux-thread-db.c:429
#50 0x0000561cb7bf7ac5 in thread_db_notice_clone (parent=..., child=...) at /home/smarchi/src/binutils-gdb/gdb/linux-thread-db.c:447
#51 0x0000561cb7bdc9a2 in linux_handle_extended_wait (lp=0x561cbae25720, status=4991) at /home/smarchi/src/binutils-gdb/gdb/linux-nat.c:1981
#52 0x0000561cb7bdf0f3 in linux_nat_filter_event (lwpid=435403, status=198015) at /home/smarchi/src/binutils-gdb/gdb/linux-nat.c:2920
#53 0x0000561cb7bdfed6 in linux_nat_wait_1 (ptid=..., ourstatus=0x7ffc4ee36398, target_options=...) at /home/smarchi/src/binutils-gdb/gdb/linux-nat.c:3202
#54 0x0000561cb7be0b68 in linux_nat_target::wait (this=0x561cb8aafb60 <the_amd64_linux_nat_target>, ptid=..., ourstatus=0x7ffc4ee36398, target_options=...) at /home/smarchi/src/binutils-gdb/gdb/linux-nat.c:3440
#55 0x0000561cb7bfa2fc in thread_db_target::wait (this=0x561cb8a9acd0 <the_thread_db_target>, ptid=..., ourstatus=0x7ffc4ee36398, options=...) at /home/smarchi/src/binutils-gdb/gdb/linux-thread-db.c:1412
#56 0x0000561cb7d8e356 in record_btrace_target::wait (this=0x561cb8aa6250 <record_btrace_ops>, ptid=..., status=0x7ffc4ee36398, options=...) at /home/smarchi/src/binutils-gdb/gdb/record-btrace.c:2547
#57 0x0000561cb7ef996d in target_wait (ptid=..., status=0x7ffc4ee36398, options=...) at /home/smarchi/src/binutils-gdb/gdb/target.c:2608
#58 0x0000561cb7b6d297 in do_target_wait_1 (inf=0x561cba6d8780, ptid=..., status=0x7ffc4ee36398, options=...) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:3640
#59 0x0000561cb7b6d43e in operator() (__closure=0x7ffc4ee36190, inf=0x561cba6d8780) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:3701
#60 0x0000561cb7b6d7b2 in do_target_wait (ecs=0x7ffc4ee36370, options=...) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:3720
#61 0x0000561cb7b6e67d in fetch_inferior_event () at /home/smarchi/src/binutils-gdb/gdb/infrun.c:4069
#62 0x0000561cb7b4659b in inferior_event_handler (event_type=INF_REG_EVENT) at /home/smarchi/src/binutils-gdb/gdb/inf-loop.c:41
#63 0x0000561cb7be25f7 in handle_target_event (error=0, client_data=0x0) at /home/smarchi/src/binutils-gdb/gdb/linux-nat.c:4227
#64 0x0000561cb81e4ee2 in handle_file_event (file_ptr=0x561cbae24e10, ready_mask=1) at /home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:575
#65 0x0000561cb81e5490 in gdb_wait_for_event (block=0) at /home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:701
#66 0x0000561cb81e41be in gdb_do_one_event () at /home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:212
#67 0x0000561cb7c18096 in start_event_loop () at /home/smarchi/src/binutils-gdb/gdb/main.c:421
#68 0x0000561cb7c181e0 in captured_command_loop () at /home/smarchi/src/binutils-gdb/gdb/main.c:481
#69 0x0000561cb7c19d7e in captured_main (data=0x7ffc4ee366a0) at /home/smarchi/src/binutils-gdb/gdb/main.c:1353
#70 0x0000561cb7c19df0 in gdb_main (args=0x7ffc4ee366a0) at /home/smarchi/src/binutils-gdb/gdb/main.c:1368
#71 0x0000561cb7693186 in main (argc=11, argv=0x7ffc4ee367b8) at /home/smarchi/src/binutils-gdb/gdb/gdb.c:32
At frame 45, the new_thread observable is fired. At this moment, the
new thread isn't the current thread, inferior_ptid is null_ptid. I
think this is ok: the new_thread observable doesn't give any guarantee
on the global context when observers are invoked. Frame 35,
btrace_compute_ftrace_bts, calls gdb_insn_length. gdb_insn_length
doesn't have a thread_info or other parameter what could indicate where
to read memory from, it implicitly uses the global context
(inferior_ptid).
So we reach the all_non_exited_threads_range in
record_btrace_target::record_is_replaying with a null inferior_ptid.
The previous implemention of all_non_exited_threads_range didn't care,
but the new one does. The problem of calling gdb_insn_length and
ultimately trying to read memory with a null inferior_ptid already
existed, but the commit mentioned above made it visible.
Something between frames 40 (record_btrace_enable_warn) and 35
(btrace_compute_ftrace_bts) needs to be switching the global context to
make TP the current thread. Since btrace_compute_ftrace_bts takes the
thread_info to work with as a parameter, that typically means that it
doesn't require its caller to also set the global current context
(current thread) when calling. If it needs to call other functions
that do require the global current thread to be set, then it needs to
temporarily change the current thread while calling these other
functions. Therefore, switch and restore the current thread in
btrace_compute_ftrace_bts.
By inspection, it looks like btrace_compute_ftrace_pt may also call
functions sensitive to the global context: it installs the
btrace_pt_readmem_callback callback in the PT instruction decoder. When
this function gets called, inferior_ptid must be set appropriately. Add
a switch and restore in there too.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28086
Change-Id: I407fbfe41aab990068bd102491aa3709b0a034b3
I'm debugging why GDB crashes on OpenBSD/amd64, turns out it's because
x86_dr_low.get_status is nullptr. It would have been useful to be able
to break on x86_dr_low_get_status, so I thought it would be a good
reason to convert these function-like macros into functions.
Change-Id: Ic200b50ef8455b4697bc518da0fa2bb704cf4721
When run with the gdb-index or debug-names target boards, dup-psym.exp
fails. This came up for me because my new DWARF scanner reuses this
part of the existing index code, and so it registers as a regression.
This is PR symtab/25834.
Looking into this, I found that the DWARF index code here is fairly
different from the psymtab code. I don't think there's a deep reason
for this, and in fact, it seemed to me that the index code could
simply mimic what the psymtab code already does.
That is what this patch implements. The DW_AT_name and DW_AT_comp_dir
are now stored in the quick file names table. This may require
allocating a quick file names table even when DW_AT_stmt_list does not
exist. Then, the functions that work with this data are changed to
use find_source_or_rewrite, just as the psymbol code does. Finally,
line_header::file_full_name is removed, as it is no longer needed.
Currently, the index maintains a hash table of "quick file names".
The hash table uses a deletion function to free the "real name"
components when necessary. There's also a second such function to
implement the forget_cached_source_info method.
This bug fix patch will create a quick file name object even when
there is no DW_AT_stmt_list, meaning that the object won't be entered
in the hash table. So, this patch changes the memory management
approach so that the entries are cleared when the per-BFD object is
destroyed. (A dwarf2_per_cu_data destructor is not introduced,
because we have been avoiding adding a vtable to that class.)
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=25834
map_symbol_filenames can skip type units -- in fact I think it has to,
due to the assertion at the top of dw2_get_file_names. This may be a
regression due to the TU/CU unification patch, I did not check.
The DWARF index file name caching code only records when a line table
has been read and the reading failed. However, the code would be
simpler if it recorded any attempt, which is what this patch
implements.
The final bug fix in this series would duplicate the logic in
psymtab_to_fullname, so this patch extracts the body of this function
into a new function.
file_and_directory carries a std::string in case the compilation
directory is computed, but a subsequent patch wants to preserve this
string without also having to maintain the storage for it. So, this
patch arranges for the compilation directory string to be stored in
the per-BFD string bcache instead.
