This repo is old #7
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Em Mon, Feb 18, 2019 at 01:28:48PM +0000, Gareth Andrew Lloyd escreveu:
Can it be deleted, updated or have link directing people to https://git.kernel.org/pub/scm/devel/pahole/pahole.git
I was directed to this repo from a stack overflow post and ended up wasting time trying to use it.
Sure, my bad, I'll do it.
- Arnaldo
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acmel
added a commit
that referenced
this issue
Jul 1, 2019
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: 13e5b9f ("fprintf: Add unnamed bitfield padding at the end to rebuild original type")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
added a commit
that referenced
this issue
Jul 8, 2021
…() calls As this ends up racing on a tsearch() call, probably for some libdw cache that gets updated/lookedup in concurrent pahole threads (-j N). This cures the following, a patch for libdw will be cooked up and sent. (gdb) run -j -I -F dwarf vmlinux > /dev/null Starting program: /var/home/acme/git/pahole/build/pahole -j -I -F dwarf vmlinux > /dev/null warning: Expected absolute pathname for libpthread in the inferior, but got .gnu_debugdata for /lib64/libpthread.so.0. warning: File "/usr/lib64/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [New LWP 844789] [New LWP 844790] [New LWP 844791] [New LWP 844792] [New LWP 844793] [New LWP 844794] [New LWP 844795] [New LWP 844796] [New LWP 844797] [New LWP 844798] [New LWP 844799] [New LWP 844800] [New LWP 844801] [New LWP 844802] [New LWP 844803] [New LWP 844804] [New LWP 844805] [New LWP 844806] [New LWP 844807] [New LWP 844808] [New LWP 844809] [New LWP 844810] [New LWP 844811] [New LWP 844812] [New LWP 844813] [New LWP 844814] Thread 2 "pahole" received signal SIGSEGV, Segmentation fault. [Switching to LWP 844789] 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7dfa4bb in ?? () from /lib64/libc.so.6 #2 0x00007ffff7f5eaa6 in __libdw_getsrclines (dbg=0x4a7f90, debug_line_offset=10383710, comp_dir=0x7ffff3c29f01 "/var/home/acme/git/build/v5.13.0-rc6+", address_size=address_size@entry=8, linesp=linesp@entry=0x7fffcfe04ba0, filesp=filesp@entry=0x7fffcfe04ba8) at dwarf_getsrclines.c:1129 #3 0x00007ffff7f5ed14 in dwarf_getsrclines (cudie=cudie@entry=0x7fffd210caf0, lines=lines@entry=0x7fffd210cac0, nlines=nlines@entry=0x7fffd210cac8) at dwarf_getsrclines.c:1213 #4 0x00007ffff7f64883 in dwarf_decl_file (die=<optimized out>) at dwarf_decl_file.c:66 #5 0x0000000000425f24 in tag__init (tag=0x7fff0421b710, cu=0x7fffcc001e40, die=0x7fffd210cd30) at /var/home/acme/git/pahole/dwarf_loader.c:476 #6 0x00000000004262ec in namespace__init (namespace=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:576 #7 0x00000000004263ac in type__init (type=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:595 #8 0x00000000004264d1 in type__new (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:614 #9 0x0000000000427ba6 in die__create_new_typedef (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1212 #10 0x0000000000428df5 in __die__process_tag (die=0x7fffd210cd30, cu=0x7fffcc001e40, top_level=1, fn=0x45cee0 <__FUNCTION__.10> "die__process_unit", conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1823 #11 0x0000000000428ea1 in die__process_unit (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1848 #12 0x0000000000429e45 in die__process (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2311 #13 0x0000000000429ecb in die__process_and_recode (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2326 #14 0x000000000042a9d6 in dwarf_cus__create_and_process_cu (dcus=0x7fffffffddc0, cu_die=0x7fffd210ce20, pointer_size=8 '\b') at /var/home/acme/git/pahole/dwarf_loader.c:2644 #15 0x000000000042ab28 in dwarf_cus__process_cu_thread (arg=0x7fffffffddc0) at /var/home/acme/git/pahole/dwarf_loader.c:2687 #16 0x00007ffff7ed6299 in start_thread () from /lib64/libpthread.so.0 #17 0x00007ffff7dfe353 in ?? () from /lib64/libc.so.6 (gdb) (gdb) fr 2 1085 (gdb) list files_lines_compare 1086 static int 1087 files_lines_compare (const void *p1, const void *p2) 1088 { 1089 const struct files_lines_s *t1 = p1; 1090 const struct files_lines_s *t2 = p2; 1091 1092 if (t1->debug_line_offset < t2->debug_line_offset) (gdb) 1093 return -1; 1094 if (t1->debug_line_offset > t2->debug_line_offset) 1095 return 1; 1096 1097 return 0; 1098 } 1099 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, (gdb) list __libdw_getsrclines 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, 1103 const char *comp_dir, unsigned address_size, 1104 Dwarf_Lines **linesp, Dwarf_Files **filesp) 1105 { 1106 struct files_lines_s fake = { .debug_line_offset = debug_line_offset }; 1107 struct files_lines_s **found = tfind (&fake, &dbg->files_lines, 1108 files_lines_compare); 1109 if (found == NULL) (gdb) 1110 { 1111 Elf_Data *data = __libdw_checked_get_data (dbg, IDX_debug_line); 1112 if (data == NULL 1113 || __libdw_offset_in_section (dbg, IDX_debug_line, 1114 debug_line_offset, 1) != 0) 1115 return -1; 1116 1117 const unsigned char *linep = data->d_buf + debug_line_offset; 1118 const unsigned char *lineendp = data->d_buf + data->d_size; 1119 (gdb) 1120 struct files_lines_s *node = libdw_alloc (dbg, struct files_lines_s, 1121 sizeof *node, 1); 1122 1123 if (read_srclines (dbg, linep, lineendp, comp_dir, address_size, 1124 &node->lines, &node->files) != 0) 1125 return -1; 1126 1127 node->debug_line_offset = debug_line_offset; 1128 1129 found = tsearch (node, &dbg->files_lines, files_lines_compare); (gdb) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
added a commit
that referenced
this issue
Jul 27, 2021
…() calls As this ends up racing on a tsearch() call, probably for some libdw cache that gets updated/lookedup in concurrent pahole threads (-j N). This cures the following, a patch for libdw will be cooked up and sent. (gdb) run -j -I -F dwarf vmlinux > /dev/null Starting program: /var/home/acme/git/pahole/build/pahole -j -I -F dwarf vmlinux > /dev/null warning: Expected absolute pathname for libpthread in the inferior, but got .gnu_debugdata for /lib64/libpthread.so.0. warning: File "/usr/lib64/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [New LWP 844789] [New LWP 844790] [New LWP 844791] [New LWP 844792] [New LWP 844793] [New LWP 844794] [New LWP 844795] [New LWP 844796] [New LWP 844797] [New LWP 844798] [New LWP 844799] [New LWP 844800] [New LWP 844801] [New LWP 844802] [New LWP 844803] [New LWP 844804] [New LWP 844805] [New LWP 844806] [New LWP 844807] [New LWP 844808] [New LWP 844809] [New LWP 844810] [New LWP 844811] [New LWP 844812] [New LWP 844813] [New LWP 844814] Thread 2 "pahole" received signal SIGSEGV, Segmentation fault. [Switching to LWP 844789] 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7dfa4bb in ?? () from /lib64/libc.so.6 #2 0x00007ffff7f5eaa6 in __libdw_getsrclines (dbg=0x4a7f90, debug_line_offset=10383710, comp_dir=0x7ffff3c29f01 "/var/home/acme/git/build/v5.13.0-rc6+", address_size=address_size@entry=8, linesp=linesp@entry=0x7fffcfe04ba0, filesp=filesp@entry=0x7fffcfe04ba8) at dwarf_getsrclines.c:1129 #3 0x00007ffff7f5ed14 in dwarf_getsrclines (cudie=cudie@entry=0x7fffd210caf0, lines=lines@entry=0x7fffd210cac0, nlines=nlines@entry=0x7fffd210cac8) at dwarf_getsrclines.c:1213 #4 0x00007ffff7f64883 in dwarf_decl_file (die=<optimized out>) at dwarf_decl_file.c:66 #5 0x0000000000425f24 in tag__init (tag=0x7fff0421b710, cu=0x7fffcc001e40, die=0x7fffd210cd30) at /var/home/acme/git/pahole/dwarf_loader.c:476 #6 0x00000000004262ec in namespace__init (namespace=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:576 #7 0x00000000004263ac in type__init (type=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:595 #8 0x00000000004264d1 in type__new (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:614 #9 0x0000000000427ba6 in die__create_new_typedef (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1212 #10 0x0000000000428df5 in __die__process_tag (die=0x7fffd210cd30, cu=0x7fffcc001e40, top_level=1, fn=0x45cee0 <__FUNCTION__.10> "die__process_unit", conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1823 #11 0x0000000000428ea1 in die__process_unit (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1848 #12 0x0000000000429e45 in die__process (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2311 #13 0x0000000000429ecb in die__process_and_recode (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2326 #14 0x000000000042a9d6 in dwarf_cus__create_and_process_cu (dcus=0x7fffffffddc0, cu_die=0x7fffd210ce20, pointer_size=8 '\b') at /var/home/acme/git/pahole/dwarf_loader.c:2644 #15 0x000000000042ab28 in dwarf_cus__process_cu_thread (arg=0x7fffffffddc0) at /var/home/acme/git/pahole/dwarf_loader.c:2687 #16 0x00007ffff7ed6299 in start_thread () from /lib64/libpthread.so.0 #17 0x00007ffff7dfe353 in ?? () from /lib64/libc.so.6 (gdb) (gdb) fr 2 1085 (gdb) list files_lines_compare 1086 static int 1087 files_lines_compare (const void *p1, const void *p2) 1088 { 1089 const struct files_lines_s *t1 = p1; 1090 const struct files_lines_s *t2 = p2; 1091 1092 if (t1->debug_line_offset < t2->debug_line_offset) (gdb) 1093 return -1; 1094 if (t1->debug_line_offset > t2->debug_line_offset) 1095 return 1; 1096 1097 return 0; 1098 } 1099 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, (gdb) list __libdw_getsrclines 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, 1103 const char *comp_dir, unsigned address_size, 1104 Dwarf_Lines **linesp, Dwarf_Files **filesp) 1105 { 1106 struct files_lines_s fake = { .debug_line_offset = debug_line_offset }; 1107 struct files_lines_s **found = tfind (&fake, &dbg->files_lines, 1108 files_lines_compare); 1109 if (found == NULL) (gdb) 1110 { 1111 Elf_Data *data = __libdw_checked_get_data (dbg, IDX_debug_line); 1112 if (data == NULL 1113 || __libdw_offset_in_section (dbg, IDX_debug_line, 1114 debug_line_offset, 1) != 0) 1115 return -1; 1116 1117 const unsigned char *linep = data->d_buf + debug_line_offset; 1118 const unsigned char *lineendp = data->d_buf + data->d_size; 1119 (gdb) 1120 struct files_lines_s *node = libdw_alloc (dbg, struct files_lines_s, 1121 sizeof *node, 1); 1122 1123 if (read_srclines (dbg, linep, lineendp, comp_dir, address_size, 1124 &node->lines, &node->files) != 0) 1125 return -1; 1126 1127 node->debug_line_offset = debug_line_offset; 1128 1129 found = tsearch (node, &dbg->files_lines, files_lines_compare); (gdb) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
added a commit
that referenced
this issue
Jul 28, 2021
…() calls As this ends up racing on a tsearch() call, probably for some libdw cache that gets updated/lookedup in concurrent pahole threads (-j N). This cures the following, a patch for libdw will be cooked up and sent. (gdb) run -j -I -F dwarf vmlinux > /dev/null Starting program: /var/home/acme/git/pahole/build/pahole -j -I -F dwarf vmlinux > /dev/null warning: Expected absolute pathname for libpthread in the inferior, but got .gnu_debugdata for /lib64/libpthread.so.0. warning: File "/usr/lib64/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [New LWP 844789] [New LWP 844790] [New LWP 844791] [New LWP 844792] [New LWP 844793] [New LWP 844794] [New LWP 844795] [New LWP 844796] [New LWP 844797] [New LWP 844798] [New LWP 844799] [New LWP 844800] [New LWP 844801] [New LWP 844802] [New LWP 844803] [New LWP 844804] [New LWP 844805] [New LWP 844806] [New LWP 844807] [New LWP 844808] [New LWP 844809] [New LWP 844810] [New LWP 844811] [New LWP 844812] [New LWP 844813] [New LWP 844814] Thread 2 "pahole" received signal SIGSEGV, Segmentation fault. [Switching to LWP 844789] 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7dfa4bb in ?? () from /lib64/libc.so.6 #2 0x00007ffff7f5eaa6 in __libdw_getsrclines (dbg=0x4a7f90, debug_line_offset=10383710, comp_dir=0x7ffff3c29f01 "/var/home/acme/git/build/v5.13.0-rc6+", address_size=address_size@entry=8, linesp=linesp@entry=0x7fffcfe04ba0, filesp=filesp@entry=0x7fffcfe04ba8) at dwarf_getsrclines.c:1129 #3 0x00007ffff7f5ed14 in dwarf_getsrclines (cudie=cudie@entry=0x7fffd210caf0, lines=lines@entry=0x7fffd210cac0, nlines=nlines@entry=0x7fffd210cac8) at dwarf_getsrclines.c:1213 #4 0x00007ffff7f64883 in dwarf_decl_file (die=<optimized out>) at dwarf_decl_file.c:66 #5 0x0000000000425f24 in tag__init (tag=0x7fff0421b710, cu=0x7fffcc001e40, die=0x7fffd210cd30) at /var/home/acme/git/pahole/dwarf_loader.c:476 #6 0x00000000004262ec in namespace__init (namespace=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:576 #7 0x00000000004263ac in type__init (type=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:595 #8 0x00000000004264d1 in type__new (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:614 #9 0x0000000000427ba6 in die__create_new_typedef (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1212 #10 0x0000000000428df5 in __die__process_tag (die=0x7fffd210cd30, cu=0x7fffcc001e40, top_level=1, fn=0x45cee0 <__FUNCTION__.10> "die__process_unit", conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1823 #11 0x0000000000428ea1 in die__process_unit (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1848 #12 0x0000000000429e45 in die__process (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2311 #13 0x0000000000429ecb in die__process_and_recode (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2326 #14 0x000000000042a9d6 in dwarf_cus__create_and_process_cu (dcus=0x7fffffffddc0, cu_die=0x7fffd210ce20, pointer_size=8 '\b') at /var/home/acme/git/pahole/dwarf_loader.c:2644 #15 0x000000000042ab28 in dwarf_cus__process_cu_thread (arg=0x7fffffffddc0) at /var/home/acme/git/pahole/dwarf_loader.c:2687 #16 0x00007ffff7ed6299 in start_thread () from /lib64/libpthread.so.0 #17 0x00007ffff7dfe353 in ?? () from /lib64/libc.so.6 (gdb) (gdb) fr 2 1085 (gdb) list files_lines_compare 1086 static int 1087 files_lines_compare (const void *p1, const void *p2) 1088 { 1089 const struct files_lines_s *t1 = p1; 1090 const struct files_lines_s *t2 = p2; 1091 1092 if (t1->debug_line_offset < t2->debug_line_offset) (gdb) 1093 return -1; 1094 if (t1->debug_line_offset > t2->debug_line_offset) 1095 return 1; 1096 1097 return 0; 1098 } 1099 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, (gdb) list __libdw_getsrclines 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, 1103 const char *comp_dir, unsigned address_size, 1104 Dwarf_Lines **linesp, Dwarf_Files **filesp) 1105 { 1106 struct files_lines_s fake = { .debug_line_offset = debug_line_offset }; 1107 struct files_lines_s **found = tfind (&fake, &dbg->files_lines, 1108 files_lines_compare); 1109 if (found == NULL) (gdb) 1110 { 1111 Elf_Data *data = __libdw_checked_get_data (dbg, IDX_debug_line); 1112 if (data == NULL 1113 || __libdw_offset_in_section (dbg, IDX_debug_line, 1114 debug_line_offset, 1) != 0) 1115 return -1; 1116 1117 const unsigned char *linep = data->d_buf + debug_line_offset; 1118 const unsigned char *lineendp = data->d_buf + data->d_size; 1119 (gdb) 1120 struct files_lines_s *node = libdw_alloc (dbg, struct files_lines_s, 1121 sizeof *node, 1); 1122 1123 if (read_srclines (dbg, linep, lineendp, comp_dir, address_size, 1124 &node->lines, &node->files) != 0) 1125 return -1; 1126 1127 node->debug_line_offset = debug_line_offset; 1128 1129 found = tsearch (node, &dbg->files_lines, files_lines_compare); (gdb) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
added a commit
that referenced
this issue
Aug 6, 2021
…() calls As this ends up racing on a tsearch() call, probably for some libdw cache that gets updated/lookedup in concurrent pahole threads (-j N). This cures the following, a patch for libdw will be cooked up and sent. (gdb) run -j -I -F dwarf vmlinux > /dev/null Starting program: /var/home/acme/git/pahole/build/pahole -j -I -F dwarf vmlinux > /dev/null warning: Expected absolute pathname for libpthread in the inferior, but got .gnu_debugdata for /lib64/libpthread.so.0. warning: File "/usr/lib64/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [New LWP 844789] [New LWP 844790] [New LWP 844791] [New LWP 844792] [New LWP 844793] [New LWP 844794] [New LWP 844795] [New LWP 844796] [New LWP 844797] [New LWP 844798] [New LWP 844799] [New LWP 844800] [New LWP 844801] [New LWP 844802] [New LWP 844803] [New LWP 844804] [New LWP 844805] [New LWP 844806] [New LWP 844807] [New LWP 844808] [New LWP 844809] [New LWP 844810] [New LWP 844811] [New LWP 844812] [New LWP 844813] [New LWP 844814] Thread 2 "pahole" received signal SIGSEGV, Segmentation fault. [Switching to LWP 844789] 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7dfa4bb in ?? () from /lib64/libc.so.6 #2 0x00007ffff7f5eaa6 in __libdw_getsrclines (dbg=0x4a7f90, debug_line_offset=10383710, comp_dir=0x7ffff3c29f01 "/var/home/acme/git/build/v5.13.0-rc6+", address_size=address_size@entry=8, linesp=linesp@entry=0x7fffcfe04ba0, filesp=filesp@entry=0x7fffcfe04ba8) at dwarf_getsrclines.c:1129 #3 0x00007ffff7f5ed14 in dwarf_getsrclines (cudie=cudie@entry=0x7fffd210caf0, lines=lines@entry=0x7fffd210cac0, nlines=nlines@entry=0x7fffd210cac8) at dwarf_getsrclines.c:1213 #4 0x00007ffff7f64883 in dwarf_decl_file (die=<optimized out>) at dwarf_decl_file.c:66 #5 0x0000000000425f24 in tag__init (tag=0x7fff0421b710, cu=0x7fffcc001e40, die=0x7fffd210cd30) at /var/home/acme/git/pahole/dwarf_loader.c:476 #6 0x00000000004262ec in namespace__init (namespace=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:576 #7 0x00000000004263ac in type__init (type=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:595 #8 0x00000000004264d1 in type__new (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:614 #9 0x0000000000427ba6 in die__create_new_typedef (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1212 #10 0x0000000000428df5 in __die__process_tag (die=0x7fffd210cd30, cu=0x7fffcc001e40, top_level=1, fn=0x45cee0 <__FUNCTION__.10> "die__process_unit", conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1823 #11 0x0000000000428ea1 in die__process_unit (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1848 #12 0x0000000000429e45 in die__process (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2311 #13 0x0000000000429ecb in die__process_and_recode (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2326 #14 0x000000000042a9d6 in dwarf_cus__create_and_process_cu (dcus=0x7fffffffddc0, cu_die=0x7fffd210ce20, pointer_size=8 '\b') at /var/home/acme/git/pahole/dwarf_loader.c:2644 #15 0x000000000042ab28 in dwarf_cus__process_cu_thread (arg=0x7fffffffddc0) at /var/home/acme/git/pahole/dwarf_loader.c:2687 #16 0x00007ffff7ed6299 in start_thread () from /lib64/libpthread.so.0 #17 0x00007ffff7dfe353 in ?? () from /lib64/libc.so.6 (gdb) (gdb) fr 2 1085 (gdb) list files_lines_compare 1086 static int 1087 files_lines_compare (const void *p1, const void *p2) 1088 { 1089 const struct files_lines_s *t1 = p1; 1090 const struct files_lines_s *t2 = p2; 1091 1092 if (t1->debug_line_offset < t2->debug_line_offset) (gdb) 1093 return -1; 1094 if (t1->debug_line_offset > t2->debug_line_offset) 1095 return 1; 1096 1097 return 0; 1098 } 1099 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, (gdb) list __libdw_getsrclines 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, 1103 const char *comp_dir, unsigned address_size, 1104 Dwarf_Lines **linesp, Dwarf_Files **filesp) 1105 { 1106 struct files_lines_s fake = { .debug_line_offset = debug_line_offset }; 1107 struct files_lines_s **found = tfind (&fake, &dbg->files_lines, 1108 files_lines_compare); 1109 if (found == NULL) (gdb) 1110 { 1111 Elf_Data *data = __libdw_checked_get_data (dbg, IDX_debug_line); 1112 if (data == NULL 1113 || __libdw_offset_in_section (dbg, IDX_debug_line, 1114 debug_line_offset, 1) != 0) 1115 return -1; 1116 1117 const unsigned char *linep = data->d_buf + debug_line_offset; 1118 const unsigned char *lineendp = data->d_buf + data->d_size; 1119 (gdb) 1120 struct files_lines_s *node = libdw_alloc (dbg, struct files_lines_s, 1121 sizeof *node, 1); 1122 1123 if (read_srclines (dbg, linep, lineendp, comp_dir, address_size, 1124 &node->lines, &node->files) != 0) 1125 return -1; 1126 1127 node->debug_line_offset = debug_line_offset; 1128 1129 found = tsearch (node, &dbg->files_lines, files_lines_compare); (gdb) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
added a commit
that referenced
this issue
Aug 12, 2021
…() calls As this ends up racing on a tsearch() call, probably for some libdw cache that gets updated/lookedup in concurrent pahole threads (-j N). This cures the following, a patch for libdw will be cooked up and sent. (gdb) run -j -I -F dwarf vmlinux > /dev/null Starting program: /var/home/acme/git/pahole/build/pahole -j -I -F dwarf vmlinux > /dev/null warning: Expected absolute pathname for libpthread in the inferior, but got .gnu_debugdata for /lib64/libpthread.so.0. warning: File "/usr/lib64/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [New LWP 844789] [New LWP 844790] [New LWP 844791] [New LWP 844792] [New LWP 844793] [New LWP 844794] [New LWP 844795] [New LWP 844796] [New LWP 844797] [New LWP 844798] [New LWP 844799] [New LWP 844800] [New LWP 844801] [New LWP 844802] [New LWP 844803] [New LWP 844804] [New LWP 844805] [New LWP 844806] [New LWP 844807] [New LWP 844808] [New LWP 844809] [New LWP 844810] [New LWP 844811] [New LWP 844812] [New LWP 844813] [New LWP 844814] Thread 2 "pahole" received signal SIGSEGV, Segmentation fault. [Switching to LWP 844789] 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7dfa321 in ?? () from /lib64/libc.so.6 #1 0x00007ffff7dfa4bb in ?? () from /lib64/libc.so.6 #2 0x00007ffff7f5eaa6 in __libdw_getsrclines (dbg=0x4a7f90, debug_line_offset=10383710, comp_dir=0x7ffff3c29f01 "/var/home/acme/git/build/v5.13.0-rc6+", address_size=address_size@entry=8, linesp=linesp@entry=0x7fffcfe04ba0, filesp=filesp@entry=0x7fffcfe04ba8) at dwarf_getsrclines.c:1129 #3 0x00007ffff7f5ed14 in dwarf_getsrclines (cudie=cudie@entry=0x7fffd210caf0, lines=lines@entry=0x7fffd210cac0, nlines=nlines@entry=0x7fffd210cac8) at dwarf_getsrclines.c:1213 #4 0x00007ffff7f64883 in dwarf_decl_file (die=<optimized out>) at dwarf_decl_file.c:66 #5 0x0000000000425f24 in tag__init (tag=0x7fff0421b710, cu=0x7fffcc001e40, die=0x7fffd210cd30) at /var/home/acme/git/pahole/dwarf_loader.c:476 #6 0x00000000004262ec in namespace__init (namespace=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:576 #7 0x00000000004263ac in type__init (type=0x7fff0421b710, die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:595 #8 0x00000000004264d1 in type__new (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:614 #9 0x0000000000427ba6 in die__create_new_typedef (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1212 #10 0x0000000000428df5 in __die__process_tag (die=0x7fffd210cd30, cu=0x7fffcc001e40, top_level=1, fn=0x45cee0 <__FUNCTION__.10> "die__process_unit", conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1823 #11 0x0000000000428ea1 in die__process_unit (die=0x7fffd210cd30, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:1848 #12 0x0000000000429e45 in die__process (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2311 #13 0x0000000000429ecb in die__process_and_recode (die=0x7fffd210ce20, cu=0x7fffcc001e40, conf=0x475600 <conf_load>) at /var/home/acme/git/pahole/dwarf_loader.c:2326 #14 0x000000000042a9d6 in dwarf_cus__create_and_process_cu (dcus=0x7fffffffddc0, cu_die=0x7fffd210ce20, pointer_size=8 '\b') at /var/home/acme/git/pahole/dwarf_loader.c:2644 #15 0x000000000042ab28 in dwarf_cus__process_cu_thread (arg=0x7fffffffddc0) at /var/home/acme/git/pahole/dwarf_loader.c:2687 #16 0x00007ffff7ed6299 in start_thread () from /lib64/libpthread.so.0 #17 0x00007ffff7dfe353 in ?? () from /lib64/libc.so.6 (gdb) (gdb) fr 2 1085 (gdb) list files_lines_compare 1086 static int 1087 files_lines_compare (const void *p1, const void *p2) 1088 { 1089 const struct files_lines_s *t1 = p1; 1090 const struct files_lines_s *t2 = p2; 1091 1092 if (t1->debug_line_offset < t2->debug_line_offset) (gdb) 1093 return -1; 1094 if (t1->debug_line_offset > t2->debug_line_offset) 1095 return 1; 1096 1097 return 0; 1098 } 1099 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, (gdb) list __libdw_getsrclines 1100 int 1101 internal_function 1102 __libdw_getsrclines (Dwarf *dbg, Dwarf_Off debug_line_offset, 1103 const char *comp_dir, unsigned address_size, 1104 Dwarf_Lines **linesp, Dwarf_Files **filesp) 1105 { 1106 struct files_lines_s fake = { .debug_line_offset = debug_line_offset }; 1107 struct files_lines_s **found = tfind (&fake, &dbg->files_lines, 1108 files_lines_compare); 1109 if (found == NULL) (gdb) 1110 { 1111 Elf_Data *data = __libdw_checked_get_data (dbg, IDX_debug_line); 1112 if (data == NULL 1113 || __libdw_offset_in_section (dbg, IDX_debug_line, 1114 debug_line_offset, 1) != 0) 1115 return -1; 1116 1117 const unsigned char *linep = data->d_buf + debug_line_offset; 1118 const unsigned char *lineendp = data->d_buf + data->d_size; 1119 (gdb) 1120 struct files_lines_s *node = libdw_alloc (dbg, struct files_lines_s, 1121 sizeof *node, 1); 1122 1123 if (read_srclines (dbg, linep, lineendp, comp_dir, address_size, 1124 &node->lines, &node->files) != 0) 1125 return -1; 1126 1127 node->debug_line_offset = debug_line_offset; 1128 1129 found = tsearch (node, &dbg->files_lines, files_lines_compare); (gdb) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
Seems to be up-to-date? |
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Please use the 'next' branch |
acmel
added a commit
that referenced
this issue
Jan 28, 2022
…ne_size field tldr; gdb pfunct (gdb) run --compile tcp.o Program received signal SIGFPE, Arithmetic exception. 0x00007ffff7f18551 in class__fprintf_cacheline_boundary (conf=0x7fffffffda10, offset=0, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:1319 1319 uint32_t cacheline = offset / conf->cacheline_size; (gdb) bt #0 0x00007ffff7f18551 in class__fprintf_cacheline_boundary (conf=0x7fffffffda10, offset=0, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:1319 #1 0x00007ffff7f16af2 in class_member__fprintf (member=0x45de10, union_member=false, type=0x45dfb0, cu=0x435a40, conf=0x7fffffffda10, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:869 #2 0x00007ffff7f1717b in struct_member__fprintf (member=0x45de10, type=0x45dfb0, cu=0x435a40, conf=0x7fffffffda10, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:983 #3 0x00007ffff7f1945c in __class__fprintf (class=0x45dcc0, cu=0x435a40, conf=0x7fffffffdbb0, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:1583 #4 0x00007ffff7f1a6bd in tag__fprintf (tag=0x45dcc0, cu=0x435a40, conf=0x7fffffffdc70, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_fprintf.c:1906 #5 0x00007ffff7fbf022 in type__emit (tag=0x45dcc0, cu=0x435a40, prefix=0x0, suffix=0x0, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:333 #6 0x00007ffff7fbed3d in tag__emit_definitions (tag=0x6b21e0, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:265 #7 0x00007ffff7fbef45 in type__emit_definitions (tag=0x6b20c0, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:315 #8 0x00007ffff7fbed15 in tag__emit_definitions (tag=0x6b3b40, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:264 #9 0x00007ffff7fbef45 in type__emit_definitions (tag=0x6b31d0, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:315 #10 0x00007ffff7fbed15 in tag__emit_definitions (tag=0x4cb920, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:264 #11 0x00007ffff7fbef45 in type__emit_definitions (tag=0x4cb7d0, cu=0x435a40, emissions=0x408300 <emissions>, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/dwarves_emit.c:315 #12 0x0000000000403592 in function__emit_type_definitions (func=0x738ad0, cu=0x435a40, fp=0x7ffff7e17520 <_IO_2_1_stdout_>) at /var/home/acme/git/pahole/pfunct.c:353 #13 0x0000000000403670 in function__show (func=0x738ad0, cu=0x435a40) at /var/home/acme/git/pahole/pfunct.c:371 #14 0x00000000004038e9 in cu_function_iterator (cu=0x435a40, cookie=0x0) at /var/home/acme/git/pahole/pfunct.c:404 #15 0x00007ffff7f1296b in cus__for_each_cu (cus=0x4369e0, iterator=0x403869 <cu_function_iterator>, cookie=0x0, filter=0x0) at /var/home/acme/git/pahole/dwarves.c:1919 #16 0x000000000040432a in main (argc=3, argv=0x7fffffffe1f8) at /var/home/acme/git/pahole/pfunct.c:776 (gdb) p conf->cacheline_size $2 = 0 We need to pass a conf_fprintf pointer to the chain starting with function__emit_type_definitions(), i.e. dwarves_emit.c needs to receive the printing configuration instead of, right at type__emit() synthesize a conf_fprintf without initializing conf_fprintf->cacheline_size which ends up in a division by zero. But to fix this quicker just add a helper that checks if it is zero and uses the conf_fprintf__defaults.cacheline_size field that is being initialized by all tools via: dwarves__resolve_cacheline_size(&conf_load, 0); Fixes: 772725a ("dwarves_fprintf: Move cacheline_size into struct conf_fprintf") Cc: Douglas Raillard <douglas.raillard@arm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
acmel
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Jun 18, 2024
In cu__new() zalloc() is used defensively, and that helped catch this problem where we assume that a cu us in the cus list of cu instances, but that is not the case when we use cus__merge_and_process_cu(), for instance when loading files created by clang with LTO, as reported by Peter Jung and narrowed down by Nathan Chancellor. If we use INIT_LIST_HEAD() in cu__new() to initialize cu->node, which is what we do with other lists and nodes there, then the unconditional removal using list_del_init() will be a no-op and removing something not on the cus list of cu instances will not cause problems, just keep an unconsistent cus->nr_entries field. So lets just have this fix in first, keeping Nathan's Tested-by and then do the a bit more involved fix of either adding that cu to the cus list or checking at removal time if it is there. Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7f1e13e in __list_del (prev=0x0, next=0x0) at /home/acme/git/pahole/list.h:106 106 next->prev = prev; (gdb) bt #0 0x00007ffff7f1e13e in __list_del (prev=0x0, next=0x0) at /home/acme/git/pahole/list.h:106 #1 0x00007ffff7f1e176 in list_del_init (entry=0x417980) at /home/acme/git/pahole/list.h:165 #2 0x00007ffff7f1f8f9 in __cus__remove (cus=0x4142a0, cu=0x417980) at /home/acme/git/pahole/dwarves.c:527 #3 0x00007ffff7f1f92b in cus__remove (cus=0x4142a0, cu=0x417980) at /home/acme/git/pahole/dwarves.c:533 #4 0x00007ffff7f3d01c in cus__finalize (cus=0x4142a0, cu=0x417980, conf=0x4133c0 <conf_load>, thr_data=0x0) at /home/acme/git/pahole/dwarf_loader.c:3040 #5 0x00007ffff7f3e05c in cus__merge_and_process_cu (cus=0x4142a0, conf=0x4133c0 <conf_load>, mod=0x415cf0, dw=0x416110, elf=0x414380, filename=0x7fffffffe3f7 "cast_common.ko", build_id=0x416680 "\265D\371U\213\373u|\037\250\242\032\271\365⒜]y\023", build_id_len=20, type_dcu=0x0) at /home/acme/git/pahole/dwarf_loader.c:3482 #6 0x00007ffff7f3e218 in cus__load_module (cus=0x4142a0, conf=0x4133c0 <conf_load>, mod=0x415cf0, dw=0x416110, elf=0x414380, filename=0x7fffffffe3f7 "cast_common.ko") at /home/acme/git/pahole/dwarf_loader.c:3521 #7 0x00007ffff7f3e396 in cus__process_dwflmod (dwflmod=0x415cf0, userdata=0x415d00, name=0x415ea0 "cast_common.ko", base=65536, arg=0x7fffffffde40) at /home/acme/git/pahole/dwarf_loader.c:3581 #8 0x00007ffff7eb4609 in dwfl_getmodules (dwfl=0x414300, callback=0x7ffff7f3e2ec <cus__process_dwflmod>, arg=0x7fffffffde40, offset=0) at ../libdwfl/dwfl_getmodules.c:86 #9 0x00007ffff7f3e4c5 in cus__process_file (cus=0x4142a0, conf=0x4133c0 <conf_load>, fd=3, filename=0x7fffffffe3f7 "cast_common.ko") at /home/acme/git/pahole/dwarf_loader.c:3647 #10 0x00007ffff7f3e5cd in dwarf__load_file (cus=0x4142a0, conf=0x4133c0 <conf_load>, filename=0x7fffffffe3f7 "cast_common.ko") at /home/acme/git/pahole/dwarf_loader.c:3684 #11 0x00007ffff7f232df in cus__load_file (cus=0x4142a0, conf=0x4133c0 <conf_load>, filename=0x7fffffffe3f7 "cast_common.ko") at /home/acme/git/pahole/dwarves.c:2134 #12 0x00007ffff7f23e8b in cus__load_files (cus=0x4142a0, conf=0x4133c0 <conf_load>, filenames=0x7fffffffe0f0) at /home/acme/git/pahole/dwarves.c:2637 #13 0x000000000040aec0 in main (argc=2, argv=0x7fffffffe0e8) at /home/acme/git/pahole/pahole.c:3805 (gdb) fr 1 #1 0x00007ffff7f1e176 in list_del_init (entry=0x417980) at /home/acme/git/pahole/list.h:165 165 __list_del(entry->prev, entry->next); (gdb) p entry $1 = (struct list_head *) 0x417980 (gdb) p entry->next $2 = (struct list_head *) 0x0 (gdb) p entry->prev $3 = (struct list_head *) 0x0 Closes: #53 Closes: https://gitlab.archlinux.org/archlinux/packaging/packages/pahole/-/issues/1 Tested-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/all/20240617210810.GA1877676@thelio-3990X Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Can it be deleted, updated or have link directing people to https://git.kernel.org/pub/scm/devel/pahole/pahole.git
I was directed to this repo from a stack overflow post and ended up wasting time trying to use it.
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