We were using the fall back for that, i.e. 'return 0;' was being emitted
for a function returning void, noticed with using BTF as the format.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Just skip them, we have no use for them so far, skipping them will allow
us to process the other kinds we have use for.
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
To agree with what ptr_table__add() does, i.e. the number of entries
(pt->nr_entries) is in fact the max id number in the table + 1, we can't
allow to add an id that is not contiguous and simply increment
nr_entries, as cu__for_each_variable(cu, id, pos) will iterate based on
nr_entries, skipping NULL buckets.
Detected when adding support for BTF variables, that share the id space
with types, but end up in different ptr_tables, so we end up with:
cu__table_add_tag(BTF_KIND_VAR)
ptr_table__add_with_id(cu->tags_table)
but:
cu__table_add_tag()
ptr_table__add_with_id(cu->types_table)
for all the other BTF_KIND_s, fix it so that ptr->nr_entries copes with
not receiving strictly monotonically incremented by one ids.
We'll have to fix this more properly by defining which tags are
supported by some debugging format and this what should go to a
ptr_table so that we have all its entries monononically incremented by
one and avoid tag__check_id_drift() returning true in the per debugging
format encoders (e.g.: btf_encoder.c).
This patch allows us to move forward and apply the BTF_KIND_VAR patch
where we'll at least produce, for global variables and a simple BPF
program with both DWARF and BTF tags the same results:
[root@quaco tracebuffer]# pglobal -F dwarf -v bristot.o
struct ____btf_map_tracebuffer__bristot ____btf_map_tracebuffer__bristot;; /* 0 */
char _license[4];; /* 0 */
int _version;; /* 0 */
struct bpf_map tracebuffer__bristot;; /* 0 */
[root@quaco tracebuffer]# pglobal -F btf -v bristot.o
BTF: idx: 17, off: 352, Unknown kind 15
BTF: idx: 18, off: 364, Unknown kind 0
BTF: idx: 19, off: 376, Unknown kind 15
BTF: idx: 20, off: 388, Unknown kind 0
BTF: idx: 21, off: 400, Unknown kind 15
BTF: idx: 22, off: 412, Unknown kind 0
BTF: idx: 23, off: 424, Unknown kind 15
BTF: idx: 24, off: 436, Unknown kind 0
struct ____btf_map_tracebuffer__bristot ____btf_map_tracebuffer__bristot;; /* 0 */
char _license[4];; /* 0 */
int _version;; /* 0 */
struct bpf_map tracebuffer__bristot;; /* 0 */
[root@quaco tracebuffer]#
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Instead of just telling that some unknown BTF_KIND_ was found in a file,
show the number to help in debugging.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
I.e. now we can, just like with pahole, use:
pglobal -F btf --variable foo.o
To get the global variables.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
To avoid using /usr/include/linux/btf.h, as it has:
[acme@quaco pahole]$ grep ^# /usr/include/linux/btf.h | head -2
#ifndef __LINUX_BTF_H__
#define __LINUX_BTF_H__
[acme@quaco pahole]$
While:
[acme@quaco pahole]$ grep ^# lib/bpf/include/uapi/linux/btf.h | head -2
#ifndef _UAPI__LINUX_BTF_H__
#define _UAPI__LINUX_BTF_H__
[acme@quaco pahole]$
Then when both get included we get duplicate definitions, to avoid that
put lib/bpf/include/uapi/ first in the include path for libbdwarves.
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Domenico reported that the README.DEBUG and changes-v1.13 files were not
in MANIFEST, so were not making into the release tarballs, fix that.
Reported-by: Domenico Andreoli <domenico.andreoli@linux.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
As there are cases where we jump to the type not found label without
having done the full copy of *conf to tconf, so at least the
type_spacing needs to have been set.
This addresses this coverity report entry:
Error: UNINIT (CWE-457): [#def23]
dwarves-1.13/dwarves_fprintf.c:600: var_decl: Declaring variable "tconf" without initializer.
dwarves-1.13/dwarves_fprintf.c:779: uninit_use_in_call: Using uninitialized value "tconf.type_spacing" when calling "fprintf".
# 777| return printed;
# 778| out_type_not_found:
# 779|-> printed = fprintf(fp, "%-*s %s", tconf.type_spacing, "<ERROR>", name);
# 780| goto out;
# 781| }
Reported-by: William Cohen <wcohen@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
In some exit paths we were accessing tconf before we had copied it from
conf, and we also were losing track of the original type that could have
been expanded and where we bumped the recursivity level member, so just
store that original type and if it is set, decrement its recursivity
level.
This addresses these coverity report entries:
Error: UNINIT (CWE-457): [#def21]
dwarves-1.13/dwarves_fprintf.c:600: var_decl: Declaring variable "tconf" without initializer.
dwarves-1.13/dwarves_fprintf.c:774: uninit_use: Using uninitialized value "tconf.expand_types".
# 772| }
# 773| out:
# 774|-> if (tconf.expand_types)
# 775| --type->recursivity_level;
# 776|
Error: FORWARD_NULL (CWE-476): [#def22]
dwarves-1.13/dwarves_fprintf.c:605: var_compare_op: Comparing "type" to null implies that "type" might be null.
dwarves-1.13/dwarves_fprintf.c:775: var_deref_op: Dereferencing null pointer "type".
# 773| out:
# 774| if (tconf.expand_types)
# 775|-> --type->recursivity_level;
# 776|
# 777| return printed;
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: f84bf73d54 ("dwarves: Move the fprintf code to a new source file.")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addresses:
[ 84%] Building C object CMakeFiles/scncopy.dir/elfcreator.c.o
/home/acme/git/pahole/elfcreator.c: In function ‘elfcreator_begin’:
/home/acme/git/pahole/elfcreator.c:57:12: error: variable ‘machine’ set but not used [-Werror=unused-but-set-variable]
GElf_Half machine;
^~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addresses:
[ 80%] Building C object CMakeFiles/prefcnt.dir/prefcnt.c.o
/home/acme/git/pahole/prefcnt.c: In function ‘refcnt_tag’:
/home/acme/git/pahole/prefcnt.c:67:5: error: suggest explicit braces to avoid ambiguous ‘else’ [-Werror=dangling-else]
if (tag__is_struct(tag) || tag__is_union(tag))
^
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addresses this warning:
[ 68%] Building C object CMakeFiles/pglobal.dir/pglobal.c.o
/home/acme/git/pahole/pglobal.c: In function ‘extvar__add’:
/home/acme/git/pahole/pglobal.c:92:11: error: suggest explicit braces to avoid ambiguous ‘else’ [-Werror=dangling-else]
else if (*nodep != gvar)
^
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
As they are temporarily disabled till we go thru them fixing up problems
with the BTF changes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addressing this compiler warning:
/home/acme/git/pahole/libbtf.c: In function ‘btf_elf__write’:
/home/acme/git/pahole/libbtf.c:655:53: error: ‘%s’ directive output may be truncated writing up to 4095 bytes into a region of size 4076 [-Werror=format-truncation=]
snprintf(cmd, sizeof(cmd), "%s --add-section .BTF=%s %s",
^~
llvm_objcopy, tmp_fn, filename);
~~~~~~
/home/acme/git/pahole/libbtf.c:655:3: note: ‘snprintf’ output 22 or more bytes (assuming 4117) into a destination of size 4096
snprintf(cmd, sizeof(cmd), "%s --add-section .BTF=%s %s",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
llvm_objcopy, tmp_fn, filename);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addressing this compiler warning:
/home/acme/git/pahole/btf_loader.c:279:41: error: pointer targets in passing argument 2 of ‘btf_elf__get32’ differ in signedness [-Werror=pointer-sign]
uint32_t value = btf_elf__get32(btfe, &ep[i].val);
^~~~~~~~~~
In file included from /home/acme/git/pahole/btf_loader.c:27:
/home/acme/git/pahole/libbtf.h:63:10: note: expected ‘uint32_t *’ {aka ‘unsigned int *’} but argument is of type ‘__s32 *’ {aka ‘int *’}
uint32_t btf_elf__get32(struct btf_elf *btf, uint32_t *p);
^~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addressing this compiler warning:
[ 22%] Building C object CMakeFiles/dwarves.dir/libctf.c.o
/home/acme/git/pahole/libctf.h: In function ‘ctf__encode’:
/home/acme/git/pahole/libctf.c:744:62: error: ‘%s’ directive output may be truncated writing up to 4095 bytes into a region of size 4064 [-Werror=format-truncation=]
snprintf(cmd, sizeof(cmd), "objcopy --add-section .SUNW_ctf=%s %s",
^~
pathname, ctf->filename);
~~~~~~~~
/home/acme/git/pahole/libctf.c:744:2: note: ‘snprintf’ output 34 or more bytes (assuming 4129) into a destination of size 4096
snprintf(cmd, sizeof(cmd), "objcopy --add-section .SUNW_ctf=%s %s",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pathname, ctf->filename);
~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
[ 22%] Building C object CMakeFiles/dwarves.dir/dwarves_fprintf.c.o
/home/acme/git/pahole/dwarves_fprintf.c: In function ‘union__fprintf’:
/home/acme/git/pahole/dwarves_fprintf.c:963:34: error: pointer targets in assignment from ‘int *’ to ‘uint32_t *’ {aka ‘unsigned int *’} differ in signedness [-Werror=pointer-sign]
uconf.cachelinep = &cacheline;
^
cc1: all warnings being treated as errors
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
In cf459ca16f ("fprintf: Pretty print struct members that are pointers
to nameless structs") I added some recursive logic that theoretically
may end up doing an overlapping copy as reported by coverity:
Error: OVERLAPPING_COPY: [#def19]
dwarves-1.13/dwarves_fprintf.c:707: assign: Assigning: "name" = "namebfptr".
dwarves-1.13/dwarves_fprintf.c:705: equal: "name" is equal to the address of "namebfptr".
dwarves-1.13/dwarves_fprintf.c:705: overlapping_copy: In the call to function "snprintf", the arguments "name" and "namebfptr" may point to the same object.
# 703| if (tag__is_struct(ptype) || tag__is_union(ptype) ||
# 704| tag__is_enumeration(ptype)) {
# 705|-> snprintf(namebfptr, sizeof(namebfptr), "* %s", name);
# 706| tconf.rel_offset = 1;
# 707|
Look at cf459ca16f to see what this is about, but for now I'm just
checking if this is the case and adding a guard, at some point I'll
address this properly to allow for pointers to pointers to nameless
struct/union/enums.
Reported-by: William Cohen <wcohen@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
As we end up goto'ing to a place where we need that original type and
were having just a NULL pointer, oops, fix it.
Related to:
Error: NULL_RETURNS (CWE-476): [#def18]
dwarves-1.13/dwarves_fprintf.c:727: returned_null: "cu__type" returns "NULL" (checked 54 out of 62 times).
dwarves-1.13/dwarves_fprintf.c:727: var_assigned: Assigning: "type" = "NULL" return value from "cu__type".
dwarves-1.13/dwarves_fprintf.c:686: dereference: Dereferencing "type", which is known to be "NULL".
dwarves-1.13/codiff.c:137: example_assign: Example 1: Assigning: "old_type" = return value from "cu__type(old_cu, old->tag.type)".
dwarves-1.13/codiff.c:141: example_checked: Example 1 (cont.): "old_type" has its value checked in "old_type == NULL".
dwarves-1.13/ctracer.c:356: example_assign: Example 2: Assigning: "type" = return value from "cu__type(cu, tag->type)".
dwarves-1.13/ctracer.c:358: example_checked: Example 2 (cont.): "type" has its value checked in "type == NULL".
dwarves-1.13/dwarves.c:914: example_assign: Example 3: Assigning: "type" = return value from "cu__type(cu, tag->type)".
dwarves-1.13/dwarves.c:916: example_checked: Example 3 (cont.): "type" has its value checked in "type == NULL".
dwarves-1.13/dwarves.c:941: example_assign: Example 4: Assigning: "tag" = return value from "cu__type(cu, var->ip.tag.type)".
dwarves-1.13/dwarves.c:942: example_checked: Example 4 (cont.): "tag" has its value checked in "tag != NULL".
dwarves-1.13/dwarves_emit.c:139: example_assign: Example 5: Assigning: "ptr_type" = return value from "cu__type(cu, type->type)".
dwarves-1.13/dwarves_emit.c:141: example_checked: Example 5 (cont.): "ptr_type" has its value checked in "ptr_type == NULL".
# 684|
# 685| next_type:
# 686|-> switch (type->tag) {
# 687| case DW_TAG_pointer_type:
# 688|
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 568dae4bd4 ("printf: Fixup printing "const" early with "const void"")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
A cut'n'paste error, noticed by coverity:
Error: PRINTF_ARGS: [#def16]
dwarves-1.13/dwarves_fprintf.c:369: extra_argument: This argument was not used by the format string: "conf->suffix". [Note: The source code implementation of the function has been overridden by a builtin model.]
# 367| */
# 368| if (type->size / 8 != sizeof(int))
# 369|-> printed += fprintf(fp, " __attribute__((__packed__))", conf->suffix);
# 370|
# 371| if (conf->suffix)
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 28a3bc7add ("fprintf: Support packed enums")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Not used at all, brought when adding vmlinux searching, but ended up not
being used, ditch it.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Addresses this coverity report entry:
Error: FORWARD_NULL (CWE-476): [#def12]
dwarves-1.13/dwarves.c:1708: var_compare_op: Comparing "conf" to null implies that "conf" might be null.
dwarves-1.13/dwarves.c:1743: var_deref_op: Dereferencing null pointer "conf".
# 1741|
# 1742| while (debug_fmt_table[i] != NULL) {
# 1743|-> if (conf->conf_fprintf)
# 1744| conf->conf_fprintf->has_alignment_info = debug_fmt_table[i]->has_alignment_info;
# 1745| if (debug_fmt_table[i]->load_file(cus, conf, filename) == 0)
The first check setting added by 49c27bdd66 ("core: Allow the loaders
to advertise features they have") was inside a block where conf was
already checked, the second wasn't, fix it.
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 49c27bdd66 ("core: Allow the loaders to advertise features they have")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
We stopped scrubbing type when looking for type->type by assigning the
result of cu__type(cu, type->type) to a temporary 'tag' variable but
continued to check the result of cu__type() looking at type... Check
'tag' instead.
Addresses these coverity report entries:
Error: NULL_RETURNS (CWE-476): [#def9]
dwarves-1.13/dwarves.c:333: returned_null: "cu__type" returns "NULL" (checked 54 out of 62 times).
dwarves-1.13/dwarves.c:333: var_assigned: Assigning: "tag" = "NULL" return value from "cu__type".
dwarves-1.13/dwarves.c:338: alias: Assigning: "type" = "tag". Both pointers are now "NULL".
dwarves-1.13/dwarves.c:312: dereference: Dereferencing "type", which is known to be "NULL".
dwarves-1.13/codiff.c:137: example_assign: Example 1: Assigning: "old_type" = return value from "cu__type(old_cu, old->tag.type)".
dwarves-1.13/codiff.c:141: example_checked: Example 1 (cont.): "old_type" has its value checked in "old_type == NULL".
dwarves-1.13/ctracer.c:356: example_assign: Example 2: Assigning: "type" = return value from "cu__type(cu, tag->type)".
dwarves-1.13/ctracer.c:358: example_checked: Example 2 (cont.): "type" has its value checked in "type == NULL".
dwarves-1.13/dwarves.c:914: example_assign: Example 3: Assigning: "type" = return value from "cu__type(cu, tag->type)".
dwarves-1.13/dwarves.c:916: example_checked: Example 3 (cont.): "type" has its value checked in "type == NULL".
dwarves-1.13/dwarves.c:941: example_assign: Example 4: Assigning: "tag" = return value from "cu__type(cu, var->ip.tag.type)".
dwarves-1.13/dwarves.c:942: example_checked: Example 4 (cont.): "tag" has its value checked in "tag != NULL".
dwarves-1.13/dwarves_emit.c:139: example_assign: Example 5: Assigning: "ptr_type" = return value from "cu__type(cu, type->type)".
dwarves-1.13/dwarves_emit.c:141: example_checked: Example 5 (cont.): "ptr_type" has its value checked in "ptr_type == NULL".
# 310| }
# 311| reevaluate:
# 312|-> switch (type->tag) {
# 313| case DW_TAG_base_type:
# 314|
Error: REVERSE_INULL (CWE-476): [#def10]
dwarves-1.13/dwarves.c:312: deref_ptr: Directly dereferencing pointer "type".
dwarves-1.13/dwarves.c:334: check_after_deref: Null-checking "type" suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
# 332| case DW_TAG_volatile_type: {
# 333| struct tag *tag = cu__type(cu, type->type);
# 334|-> if (type == NULL) {
# 335| tag__id_not_found_fprintf(stderr, type->type);
# 336| continue;
Looking at this last one shows the problem in detail, check for NULL to
then deref it, phew.
This is just used in 'pahole --show_first_biggest_size_base_type_member'
and when fixing up alignment in the --reorganize code tho.
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 7fc7148be7 ("core: Fix thinko in type__find_first_biggest_size_base_type_member")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fixing this coverity report:
Error: OVERRUN (CWE-119): [#def7]
dwarves-1.13/dwarf_loader.c:54: cond_at_most: Checking "tag < DW_TAG_MIPS_loop" implies that "tag" may be up to 16512 on the true branch.
dwarves-1.13/dwarf_loader.c:55: overrun-local: Overrunning array "dwarf_tags_warned" of 66 bytes at byte offset 16512 using index "tag" (which evaluates to 16512).
# 53|
# 54| if (tag < DW_TAG_MIPS_loop) {
# 55|-> if (dwarf_tags_warned[tag])
# 56| return;
# 57| dwarf_tags_warned[tag] = true;
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: c7fa6a9a40 ("dwarf loader: Catch some more template tags")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
I changed the logic at some point stopping the use of that variable, but
then forgot to remove it, do it now.
Addresses this coverity report entry:
Error: COMPILER_WARNING: [#def3]
dwarves-1.13/codiff.c: scope_hint: In function 'main'
dwarves-1.13/codiff.c:776:8: warning: variable 'filenames' set but not used [-Wunused-but-set-variable]
# 776 | char *filenames[2];
# | ^~~~~~~~~
# 774| int remaining, err, rc = EXIT_FAILURE;
# 775| char *old_filename, *new_filename;
# 776|-> char *filenames[2];
# 777| struct stat st;
# 778|
Need to find how to make cmake show these warnings...
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 991c6a3ebb ("dwarves: Rename cus__loadfl with cus__load_files")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fixes this coverity report:
Error: RESOURCE_LEAK (CWE-772): [#def2]
dwarves-1.13/btf_loader.c:342: alloc_fn: Storage is returned from allocation function "zalloc".
dwarves-1.13/btf_loader.c:342: var_assign: Assigning: "tag" = storage returned from "zalloc(40UL)".
dwarves-1.13/btf_loader.c:354: leaked_storage: Variable "tag" going out of scope leaks the storage it points to.
# 352| default:
# 353| printf("%s: FOO %d\n\n", __func__, type);
# 354|-> return 0;
# 355| }
# 356|
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 472256d3c5 ("btf_loader: Introduce a loader for the BTF format")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Will Cohen reported this NULL pointer dereference while processing some
object linking with cuda:
#0 0x00007ffff7f91453 in __class__fprintf (class=0x522560, cu=0x40ff80, conf=0x7fffffffa930, fp=0x7ffff7ece780 <_IO_2_1_stdout_>)
at /home/acme/git/pahole/dwarves_fprintf.c:1624
#1 0x00007ffff7f92195 in tag__fprintf (tag=0x522560, cu=0x40ff80, conf=0x7fffffffa930, fp=0x7ffff7ece780 <_IO_2_1_stdout_>)
at /home/acme/git/pahole/dwarves_fprintf.c:1835
#2 0x00007ffff7f90b57 in __class__fprintf (class=0x5224c0, cu=0x40ff80, conf=0x7fffffffaaa0, fp=0x7ffff7ece780 <_IO_2_1_stdout_>)
at /home/acme/git/pahole/dwarves_fprintf.c:1406
#3 0x00007ffff7f92195 in tag__fprintf (tag=0x5224c0, cu=0x40ff80, conf=0x40a200 <conf>, fp=0x7ffff7ece780 <_IO_2_1_stdout_>)
at /home/acme/git/pahole/dwarves_fprintf.c:1835
#4 0x0000000000402d03 in class_formatter (class=0x5224c0, cu=0x40ff80, id=1257) at /home/acme/git/pahole/pahole.c:224
#5 0x0000000000403074 in print_classes (cu=0x40ff80) at /home/acme/git/pahole/pahole.c:319
#6 0x0000000000404bb2 in pahole_stealer (cu=0x40ff80, conf_load=0x40a240 <conf_load>) at /home/acme/git/pahole/pahole.c:1174
#7 0x00007ffff7f9ff73 in finalize_cu (cus=0x40b2b0, cu=0x40ff80, dcu=0x7fffffffacf0, conf=0x40a240 <conf_load>)
at /home/acme/git/pahole/dwarf_loader.c:2227
#8 0x00007ffff7f9ffac in finalize_cu_immediately (cus=0x40b2b0, cu=0x40ff80, dcu=0x7fffffffacf0, conf=0x40a240 <conf_load>)
at /home/acme/git/pahole/dwarf_loader.c:2236
#9 0x00007ffff7fa064c in cus__load_module (cus=0x40b2b0, conf=0x40a240 <conf_load>, mod=0x40d760, dw=0x40e980, elf=0x40b360,
filename=0x7fffffffd5e3 "examples/wcohen/02_Exercise.cuda") at /home/acme/git/pahole/dwarf_loader.c:2389
#10 0x00007ffff7fa0760 in cus__process_dwflmod (dwflmod=0x40d760, userdata=0x40d770, name=0x40d910 "examples/wcohen/02_Exercise.cuda",
base=4194304, arg=0x7fffffffcf10) at /home/acme/git/pahole/dwarf_loader.c:2434
#11 0x00007ffff7f32be1 in dwfl_getmodules () from /lib64/libdw.so.1
#12 0x00007ffff7fa0820 in cus__process_file (cus=0x40b2b0, conf=0x40a240 <conf_load>, fd=3,
filename=0x7fffffffd5e3 "examples/wcohen/02_Exercise.cuda") at /home/acme/git/pahole/dwarf_loader.c:2487
#13 0x00007ffff7fa089c in dwarf__load_file (cus=0x40b2b0, conf=0x40a240 <conf_load>, filename=0x7fffffffd5e3 "examples/wcohen/02_Exercise.cuda")
at /home/acme/git/pahole/dwarf_loader.c:2504
#14 0x00007ffff7f8b0dd in cus__load_file (cus=0x40b2b0, conf=0x40a240 <conf_load>, filename=0x7fffffffd5e3 "examples/wcohen/02_Exercise.cuda")
at /home/acme/git/pahole/dwarves.c:1745
#15 0x00007ffff7f8bc2a in cus__load_files (cus=0x40b2b0, conf=0x40a240 <conf_load>, filenames=0x7fffffffd150)
at /home/acme/git/pahole/dwarves.c:2109
#16 0x0000000000404ff0 in main (argc=2, argv=0x7fffffffd148) at /home/acme/git/pahole/pahole.c:1294
(gdb)
(gdb) p class__name(class, cu)
$6 = 0x5cbb85 "__nv_hdl_helper_trait<__nv_dl_tag<int (*)(int, char**), main, 1u>, void (main(int, char**)::__lambda0::*)(int, double&)const>"
(gdb) p class->type.nr_members
$7 = 0
(gdb) p last
$8 = (struct class_member *) 0x0
(gdb)
So, before checking for bitfield details, first check if there were
members.
Now, if we show all structs/classes in that object file and look for the
above data structure, we find it inside another:
$ pahole examples/wcohen/02_Exercise.cuda
<SNIP>
struct __nv_hdl_helper_trait_outer<false, false, int, Kokkos::View<double**>, Kokkos::View<double*>, Kokkos::View<double*> > {
struct __nv_hdl_helper_trait<__nv_dl_tag<int (*)(int, char**), main, 1u>, void (main(int, char**)::__lambda0::*)(int, double&)const> {
class __nv_hdl_wrapper_t<false, false, __nv_dl_tag<int (*)(int, char**), main, 1u>, void(int, double&), int, Kokkos::View<doubl get<main(int, char**)::__lambda0>(class __lambda0, int, class View<double**>, class View<double*>, class View<double*>);
/* size: 1, cachelines: 0, members: 0 */
/* padding: 1 */
/* last cacheline: 1 bytes */
};
/* size: 1, cachelines: 0, members: 0 */
/* padding: 1 */
/* last cacheline: 1 bytes */
};
<SNIP>
$
Reported-by: William Cohen <wcohen@redhat.com>
Fixes: 13e5b9fc00 ("fprintf: Add unnamed bitfield padding at the end to rebuild original type")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Adding support for suppress_packed and leaving out bitfield paddings at the end
of classes when no alignment info is available accidentally used conf instead
of cconf, where conf can be NULL, which causes cconf to have the default
fprintf config.
Fixes: 986a3b58a8 ("fprintf: Only add bitfield forced paddings when alignment info available")
Fixes: 9a4d719304 ("fprintf: Allow suppressing the inferred __attribute__((__packed__))")
Signed-off-by: Timo Paulssen <timonator@perpetuum-immobile.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When printing const more early we're not considering "const void *", fix
it.
Fixes: ccd67bdb20 ("fprintf: Print "const" for class members more early, in type__fprintf()")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
In cf459ca16f ("fprintf: Pretty print struct members that are pointers
to nameless structs") we end up breaking 'pahole --expand_types/-E.
All we need there is to print nameless structs when they are referenced
by a pointer member in a struct, i.e. it is defined only there, inline.
Check if that struct is unnamed before emitting it, keeping that fix
while fixing the regression it caused for --expand_types.
Fixes: cf459ca16f ("fprintf: Pretty print struct members that are pointers to nameless structs")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
btf_loader.c and the libbpf obtained via the git module are needed to
be able to build from the tarball generated via:
tar cvfj rpm/SOURCES/dwarves-1.13.tar.bz2 `cat MANIFEST`
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
If we have:
inline void process_adjtimex_modes(const struct __kernel_timex * txc, s32 * time_tai)
{
}
And any other struct receiving as a parameter pointers to 'struct
__kerne_timex', then the source file with the above inline, since it
doesn't have any inline expansion, i.e. 'pfunct --compile' generates
just empty function bodies, the types won't be included in the resulting
.o.
Since the original file has the expansions, type types will be there and
thus we will not be able to compare those types, so ask for any 'inline'
to be stripped, so that we keep those types and 'fullcircle' can do its
work.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo
Andrii Nakryiko
Timo Paulssen