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NEWS
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v1.21:
Fri Apr 9 2021
ae0b7dde1fd50b12 dwarf_loader: Handle DWARF5 DW_OP_addrx properly
9adb014930f31c66 dwarf_loader: Handle subprogram ret type with abstract_origin properly
5752d1951d081a80 dwarf_loader: Check .notes section for LTO build info
209e45424ff4a22d dwarf_loader: Check .debug_abbrev for cross-CU references
39227909db3cc2c2 dwarf_loader: Permit merging all DWARF CU's for clang LTO built binary
763475ca1101ccfe dwarf_loader: Factor out common code to initialize a cu
d0d3fbd4744953e8 dwarf_loader: Permit a flexible HASHTAGS__BITS
ffe0ef4d73906c18 btf: Add --btf_gen_all flag
de708b33114d42c2 btf: Add support for the floating-point types
4b7f8c04d009942b fprintf: Honour conf_fprintf.hex when printing enumerations
f2889ff163726336 Avoid warning when building with NDEBUG
8e1f8c904e303d5d btf_encoder: Match ftrace addresses within ELF functions
9fecc77ed82d429f dwarf_loader: Use a better hashing function, from libbpf
0125de3a4c055cdf btf_encoder: Funnel ELF error reporting through a macro
7d8e829f636f47ab btf_encoder: Sanitize non-regular int base type
v1.20:
Tue Feb 2 2021
8d6f06f053a06829 (HEAD -> master, seventh/master, quaco/master, origin/master, origin/HEAD) dwarf_loader: Add conditional DW_FORM_implicit_const definition for older systems
66d12e4790b7c5e5 dtagnames: Stop using the deprecated mallinfo() function
1279e439b622aeb5 cmake: Bump minimum required version to 2.8.12 as per upstream support warning
b1eaf0da6d1f72b2 dwarves: Make enum prefix search more robust
d783117162c0212d dwarf_loader: Handle DWARF5 DW_TAG_call_site like DW_TAG_GNU_call_site
3ff98a6396e91d0a dwarf_loader: Support DW_FORM_implicit_const in __attr_offset()
b91b19840b0062b8 dwarf_loader: Support DW_AT_data_bit_offset
c692e8ac5ccbab99 dwarf_loader: Optimize a bit the reading of DW_AT_data_member_location
65917b24942ce620 dwarf_loader: Fix typo
77205a119c85e396 dwarf_loader: Introduce __attr_offset() to reuse call to dwarf_attr()
8ec231f6b0c8aaef dwarf_loader: Support DW_FORM_implicit_const in attr_numeric()
7453895e01edb535 btf_encoder: Improve ELF error reporting
1bb49897dd2b65b0 bpf_encoder: Translate SHN_XINDEX in symbol's st_shndx values
3f8aad340bf1a188 elf_symtab: Handle SHN_XINDEX index in elf_section_by_name()
e32b9800e650a6eb btf_encoder: Add extra checks for symbol names
82749180b23d3c9c libbpf: allow to use packaged version
452dbcf35f1a7bf9 btf_encoder: Improve error-handling around objcopy
cf381f9a3822d68b btf_encoder: Fix handling of restrict qualifier
b688e35970600c15 btf_encoder: fix skipping per-CPU variables at offset 0
8c009d6ce762dfc9 btf_encoder: fix BTF variable generation for kernel modules
b94e97e015a94e6b dwarves: Fix compilation on 32-bit architectures
17df51c700248f02 btf_encoder: Detect kernel module ftrace addresses
06ca639505fc56c6 btf_encoder: Use address size based on ELF's class
aff60970d16b909e btf_encoder: Factor filter_functions function
1e6a3fed6e52d365 rpm: Fix changelog date
v1.19:
Fri Nov 20 2020
bf21da407593f104 fprintf: Make typedef__fprintf print anonymous enums
9c4bdf9331bf06a7 fprintf: Align enumerators
89cf28228a8ab55e fprintf: Add enumeration__max_entry_name_len()
932b84eb45a9b8ba fprintf: Make typedef__fprintf print anonymous structs
4a1479305b53933d pahole: Add heuristic to auto-add --btf_base for /sys/kernel/btf/ prefixed files
e1d01045828a5c4c btf: Fallback to raw BTF mode if the header magic matches
24cea890abedb15b pahole: Force '-F btf' with --btf_base
cfad738682506ce4 libbtf: Assume its raw_btf if filename starts with "/sys/kernel/btf/"
7293c7fceac36844 pahole: The --btf_base option receives a PATH, not a SIZE
b3dd4f3c3d5ea59e btf_encoder: Use better fallback message
d06048c53094d9d2 btf_encoder: Move btf_elf__verbose/btf_elf__force setup
8156bec8aedb685b btf_encoder: Fix function generation
d0cd007339ee509e btf_encoder: Generate also .init functions
25753e0396abea25 pfunct: Use load stealer to speed up --class
aa8fb8c091446467 man-pages: Add entry for -J/--btf_encode to pahole's man page
ace05ba9414c1fe4 btf: Add support for split BTF loading and encoding
7290d08b4a6e5876 libbpf: Update libbpf submodule reference to latest master
344f2483cfcd4952 libbtf: Improve variable naming and error reporting when writing out BTF
94a7535939f92e91 btf_encoder: Fix array index type numbering
9fa3a100f71e7a13 pfunct: Use a load stealer to stop as soon as a function is found
de18bd5fe3515358 pfunct: Try sole argument as a function name, just like pahole
bc1afd458562f21e pahole: Introduce --numeric_version for use in scripts and Makefiles
784c3dfbd63d5bcf dwarves: Switch from a string based version to major/minor numbers
fc06ee1b6e9dc14a pahole: Check if the sole arg is a file, not considering it a type if so
f47b3a2df3622204 dwarf_loader: Fix partial unit warning
5a22c2de79fb9edf btf_encoder: Change functions check due to broken dwarf
7b1af3f4844b36b9 btf_encoder: Move find_all_percpu_vars in generic collect_symbols
863e6f0f2cc08592 btf_encoder: Check var type after checking var addr.
5e7ab5b9e064a3eb btf_loader: Handle union forward declaration properly
ec3f944102a71241 cmake: Make libbpf's Linux UAPI headers available to all binaries
8cac1c54c83c346b btf_encoder: Ignore zero-sized ELF symbols
040fd7f585c9b9fc btf_encoder: Support cross-compiled ELF binaries with different endianness
29fce8dc8571c6af strings: use BTF's string APIs for strings management
75f3520fedf6afdb strings: Rename strings.h to avoid clashing with /usr/include/strings.h
bba7151e0fd2fb3a dwarf_loader: increase the size of lookup hash map
2e719cca66721284 btf_encoder: revamp how per-CPU variables are encoded
0258a47ef99500db btf_encoder: Discard CUs after BTF encoding
3c913e18b2702a9e btf_encoder: Fix emitting __ARRAY_SIZE_TYPE__ as index range type
48efa92933e81d28 btf_encoder: Use libbpf APIs to encode BTF type info
5d863aa7ce539e86 btf_loader: Use libbpf to load BTF
0a9b89910e711951 dwarves: Expose and maintain active debug info loader operations
7bc2dd07d51cb5ee btf_encoder: detect BTF encoding errors and exit
c35b7fa52cb8112a libbpf: Update to latest libbpf version
ef4f971a9cf745fc dwarf_loader: Conditionally define DW_AT_alignment
cc3f9dce3378280f pahole: Implement --packed
08f49262f474370a man-pages: Fix 'coimbine' typo
v1.18:
Fri 02 Oct 2020
aee6808c478b760f btf_loader: Initialize function->lexblock.tags to fix segfault in pdwtags
c815d26689313d8d btf_encoder: Handle DW_TAG_variable that has DW_AT_specification
b8068e7373cc1592 pahole: Only try using a single file name as a type name if not encoding BTF or CTF
8b1c63283194ebe1 libctf: Make can't get header message to appear only in verbose mode
63e11400e80f6ac4 libbtf: Make can't get header message to appear only in verbose mode
fc2b317db0bdc1a9 dwarf_loader: Check for unsupported_tag return in last two missing places
2b5f4895e8968e83 dwarf_loader: Warn user about unsupported TAGs
010a71e181b450d7 dwarf_loader: Handle unsupported_tag return in die__process_class()
3d616609ee0fd6df dwarf_loader: Add minimal handling of DW_TAG_subrange_type
2e8cd6a435d96335 dwarf_loader: Ignore DW_TAG_variant_part for now to fix a segfault
e9e6285fd0d63ed0 dwarf_loader: Skip empty CUs
1abc001417b579b8 btf_encoder: Introduce option '--btf_encode_force'
da4ad2f65028e321 btf_encoder: Allow disabling BTF var encoding.
f5847773d94d4875 fprintf: Support DW_TAG_string_type
8b00a5cd677df778 dwarf_loader: Support DW_TAG_string_type
0d9c3c9835659fb7 dwarves: Check if a member type wasn't found and avoid a NULL deref
2ecc308518edfe05 dwarf_loader: Bail out at DW_TAG_imported_unit tags
8c92fd298101171d dwarf_loader: Ignore entries in a DW_TAG_partial_unit, for now
4cfd420f7ef13af4 README: Add instructions to do a cross build
9e495f68c683574f dwarf_loader: Move vaddr to conditional where it is used
69fce762074a5483 pahole: Use "%s" in a snprintf call
22f93766cf02f4e0 pahole: Support multiple types for pretty printing
78f2177d904902c6 pahole: Print the evaluated range= per class
5c32b9d5c7ac8fff pahole: Count the total number of bytes read from stdin
e3e5a4626c94d9c5 pahole: Make sure the header is read only once
208bcd9873442013 pahole: Introduce 'range=member' as a class argument for pretty printing
b9e406311990c2d5 pahole: Cache the type_enum lookups into struct enumerator
fda1825f0b9f1c9f dwarves: Introduce tag_cu_node, so that we can have the leaner tag_cu
47d4dd4c8a2cf9fd pahole: Optimize --header processing by keeping the first successfull instance
fdfc64ec44f4ad53 pahole: Introduce --range
f63d3677e31d88a3 pahole: Support multiple enums in type_enum=
c50b6d37e99fddec pahole: Add infrastructure to have multiple concatenated type_enum
671ea22ca18dd41f pahole: Move finding type_enum to a separate function
dd3c0e9eb0cbc77f dwarves: Move the common initialization of fields for 'struct type'
aa7ab3e8755a4c12 pahole: Allow for more compact enum filters by suppressing common prefix
4ece15c37b028a80 dwarves: Find common enumerators prefix
d28bc97b5c12736b man-pages: Document pretty printing capabilities and provide examples
a345691f08f04f19 pahole: Make --header without -C to be equivalent to -C header-arg --count=1
eba4ac6b2c1dcb11 pahole: Fallback to pretty printing using types in multiple CUs
7c12b234ee30f6d2 dwarves: Introduce cus__find_type_by_name()
c6f3386e3364486d pahole: Make the type_instance constructor receive the looked up type + its CU
30297256e1f27de5 pahole: Pass the header type_instance to tag__stdio_fprintf_value()
ead8084d3ffcda1f pahole: Store the CU in the type_instance struct
2c886fff0af13510 pahole: Store the CU where type_enum was found
526b116bfec71054 pahole: If pretty printing, don't discard CUs, keep them
a1b8fddb4dcd90d9 pahole: Show which classes were not processed and why
bc6a3cac50cdbdf6 pahole: Fixup the --class_name parsing wrt class args (type=, sizeof=, etc)
363c37340521debe pahole: Remope pretty printed classes from the prototypes list
9f675e7fdbf525fb cmake: Use -O0 for debug builds
4e5b02beea24656d pahole: Don't stop when not finding the type_enum
823739b56f2b5230 pahole: Convert class_names into a list of struct prototypes
0a97d6c143fcc92a pahole: Factor out parsing class prototypes
80af0fbbf3a3f1f6 dutils: Allow for having a priv area per strlist
04b6547e7343410e pahole: Honour --hex_fmt when pretty printing
266c0255984ddbe7 pahole: Support filters without 'filter='
6c683ce0e11d6c1c pahole: Allow for a 'type' boolean class arg meaning 'type=type'
1c68f41bb87f7718 pahole: Allow for a 'sizeof' boolean class arg meaning 'sizeof=size'
b4b3fb0a3aeb9686 pahole: First look for ',' then '=' to allow for boolean args
446b85f7276bda4c pahole: Add support for --size_bytes, accepts header variables
0f10fa7529d4a9c7 pahole: Move reading the header to outside the --seek_bytes code
9310b04854a8b709 pahole: Add support for referencing header variables when pretty printing
611f5e8bd7eb760d pahole: Add == class member filtering
f2987224beb2b496 pahole: Do the 'type_enum' class argument validation as soon as we parse it
02ca176c6290ff96 pahole: Do the 'type' class argument validation earlier
172d743d9ce3f3a1 pahole: Do the 'sizeof' class argument validation earlier
9a30c101d7c019ee pahole: As soon as a attribute is found, check if the type is a struct or class
a38ccf47237298dc pahole: Allow filter=expression as a class argument for pretty printing
3c4ee1d91f5311ac pahole: Pretty print bitfields
451d66ec02e94492 pahole: Pretty print unions too, cope with unnamed ones
48c7704b49ffa6b1 pahole: Check if the type with arguments is present in the current CU
472519ac2c49d340 pahole: Support nested structs
ae43029363ee2c53 dwarves_fprintf: Export the 'tabs' variable
ab714acec86841b7 pahole: Support zero sized base type arrays
ff7815a0f823a676 pahole: Add missing space before '}' in array__fprintf_base_type_value()
5f2502274e1097db pahole: Support zero sized arrays in array__fprintf_base_type_value()
3aadfbdd72e32016 pahole: Follow array type typedefs to find real sizeof(entry)
7309039aa7510eec pahole: Make 'type' + 'type_enum' select a type to cast a variable sized record
42b7a759f37e5d45 dutil: Add a strlwr() helper to lowercase a string, returning it
a5bb31b86fbe5362 pahole: Fix --skip for variable sized records
f4df384d77312867 pahole: Decouple reading ->sizeof_member from printing
78cdde5cb7200555 pahole: Introduce 'type_enum' class argument
163c330d3138e56f dwarves: Introduce cu__find_enumeration_by_name()
20051b7157fce20c pahole: Add the 'type' modifier to make a struct member be used to find a cast type
210dffe0d13d171b pahole: Iterate classes in the order specified in the command line:
37a5c7c5ba0e1e7d strlist: Allow iterating a strlist in the original order
6b5d938d99b2e457 pahole: Support multiple class/struct args
affbebf04bcaa1ec pahole: Make the class splitter take into account per-class parameters
84387de4a5cf141d pahole: Allow specifying a struct member based sizeof() override
e0773683fa3edd61 dwarves: Allow setting a struct/class member as the source of sizeof()
f399db09a0d5b069 pahole: Allow simple parser for arguments to classes
04d957ba3cdf1047 pahole: Add variable for class name when traversing list of classes
f3d9054ba8ff1df0 btf_encoder: Teach pahole to store percpu variables in vmlinux BTF.
fe284221448c950d pahole: Introduce --seek_bytes
44af7c02b5d0a7f2 pahole: Implement --skip, just like dd
5631fdcea1bbe2bc pahole: Introduce --count, just like dd's
272bc75024b4f08c man-pages: Add information about stdin raw data pretty printing
66835f9e190ce77e pahole: Add support for base type arrays
1a67d6e70090953d pahole: Factor out base_type__fprintf_value()
6fb98aa1209f02b5 pahole: Support char arrays when dumping from stdin
a231d00f8d08825e pahole: Print comma at the end of field name + field value
1b2cdda38c0a6f5e dwarves: Introduce tag__is_array()
a83313fb22520d8d pahole: Pretty print base types in structs from stdin
cc65946e3068f7b6 dwarves: Adopt tag__is_base_type() from ctrace.c
d8079c6d373a5754 pahole: Hex dump a type from stdio when it isn't a tty
38109ab45fe0307d spec: Fix date
v1.17:
Fri 13 Mar 2020
f14426e41046 docs: Add command line to generate tarball with a prefix
0b2621d426ea dwarves: Avoid truncation when concatenating paths for dir entries
d7b351079583 dwarves: Don't use conf if its NULL in cus__load_running_kernel()
dde3eb086dd3 dwarves: Make list__for_all_tags() more robust
081f3618a795 dwarves: Add -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 to build libbpf
e8f43a4963bf libbpf: Get latest libbpf
de84ae36c738 cmake: libebl was merged into libdw
290b8fdbdab7 pahole: Improve --contains --recursive a bit
3d5be866e55f pahole: Fill 'tab' with spaces earlier
88674f039551 gobuffer: Do not crash on object without any public symbols
cb17f94f46a0 Add changes-v1.16 to the MANIFEST file
32a19e044c93 pahole: Fix changelog date in dwarves.spec
9b09f578b7d1 pahole: Initialize var to silence -Werror=maybe-uninitialized on gcc version 4.8.5 20150623
277c2b3d1b4a man-pages: Add section about --hex + -E to locate offsets deep into sub structs
812c980b3f76 man-pages: Update some info, expand BTF info, add some EXAMPLES
e0942c7b031f pahole: Add support for finding pointers to void
6a326e93088e pahole: Make --contains and --find_pointers_to to work with base types
3c1a9a3329d9 pahole: Make --contains look for more than just unions, structs
ded5d36f9cf5 dwarves: Introduce cu__find_type_by_name
88d99562e55c pahole: Add --structs to ask just for structs, counterpart of --unions
0b444cf1118c pahole: Make --contains and --find_pointers_to honour --unions
a8a7e605bb45 pahole: Make --find_pointers_to consider unions
0dc327e382f8 pahole: Consider unions when looking for classes containing some class
3661f17d0b2c pahole: Introduce --unions to consider just unions
2dd09c617101 pahole: union have no holes, fix --sizes formatter
6c29cca8c28f pahole: Don't consider unions for options that only make sense for structs
dcba200367f7 pahole: When the sole argument passed isn't a file, take it as a class name
1944de0c93e6 pahole: Use function__for_each_parameter()
66e640508e4d dwarves: Make function__for_each_parameter receive 'cu' arg
252b0fcc91cc pahole: Fix -m/--nr_methods - Number of functions operating on a type pointer
202c8d5f5bd5 pahole: Do not require a class name to operate without a file name
617f5ac2e6c9 dwarves: Move BTF loader ahead of the CTF one
cdd5e1399b9c btf loader: Support raw BTF as available in /sys/kernel/btf/vmlinux
v1.16:
Mon Dec 16 2019
69df73444c69 (HEAD -> master, acme.korg/master) dwarves: Add -O2 to CFLAGS
6d11dd157f75 elfcreator: Address initialization warning emitted by 'gcc -O6'
1bc63a4cffa7 fprintf: Fixup truncation possibility pointed out by gcc -O2
5c590fc29d06 ptr_table: Zero out new id ranges
644466dce77f fprintf: Remove extraneous sizeof operator
a59459bb80e7 fprintf: Account inline type __aligned__ member types for spacing
56547f133a5b fprintf: Fix alignment of class members that are structs/enums/unions
be37b64aef38 dwarves: Ignore static members for alignment
cca018e495a8 SPEC: Add dwarves dependency on libdwarves1
ccf3eebfcd9c btf_loader: Add support for BTF_KIND_FUNC
f95fd85f7b53 pfunct: type->type == 0 is void, fix --compile for that
3e8f09e304ba (origin/master, origin/HEAD) pdwtags: Print DW_TAG_subroutine_type as well
3c5f2a224aa1 btf_encoder: Preserve and encode exported functions as BTF_KIND_FUNC
910e060b5c4b btf_loader: Skip BTF_KIND_DATASEC entries
96235a74a34d btf_loader: Replace if/else series with a proper switch {}
a4ba2234ff58 btf_loader: Support BTF_KIND_VAR
5965ce015eab dwarves: Fix ptr_table__add_with_id() handling of pt->nr_entries
173911ac38ea btf_loader: Show the unknown kind numbers
0d8e11e8568e pglobal: Allow passing the format path specifier, to use with BTF
ba27df9f2f94 CMakeLists: Use lib/bpf/include/uapi when building libdwarves
95517e1d995e libbpf: Get latest libbpf
ca294eebfc47 MANIFEST: Add missing files
d5e01d10e515 fprintf: Set tconf.type_spacing earlier
c6a9a0eb6ac7 fprintf: Fix up decrementing recursivity level in type__fprintf()
93c3cdf89715 cmake: Add -Wall to CFLAGS
7360f0528ff3 elfcreator: Remove unused 'machine' variable
0f52b11f911c prefcnt: Avoid ambiguous else with for_each macro
608813d0affa pglobal: Avoid ambiguous else
77d06c2d305d reorganize: Enclose bitfield routines under ifdef
2221ae30bce9 reorganize: Ditch unused variable
c419c513eae5 libbtf: Enlarge the 'cmd' buffer to not possibly truncate the pathname
092fffe56701 btf_loader: Enum values are s32, cast before calling btf_elf__get32()
7bfb1aa80f9a libctf: Enlarge the 'cmd' buffer to not possibly truncate the pathname
f67c281f9841 fprintf: Correct the type for the 'cacheline' variable, it should be uint32_t
7b36fab5a8df fprintf: Add guard against unlikely overlapping copy
e737976c09d9 fprintf: Do not scrub type when looking up its type
e95dacb704bf fprintf: Remove unused printf arg when printing enumerations
71c4f83f2828 emit: Remove unused 'is_pointer' variable
fe87354c31bb dwarves: Ditch unused asprintf() function
60c73a769882 dwarves: We need to consistently check if 'conf was specified
5fdfd09a6bbe dwarves: Fix check in type__find_first_biggest_size_base_type_member()
24ced5be8a75 dwarf_loader: Fix array overrun access
33e2d7aa35a7 ctf_loader: Plug leak when bailing out due to unknown tag
aefa9303818b codiff: Remove unused filenames variable
de5e72bc15fb btf_loader: Plug leak when bailing out due to unknown tag
511a79129494 dwarves: Remove unused variable
b1412a88bb61 fprintf: Fixup handling classes with no members
[acme@quaco pahole]$
v1.15
Thu Jun 27 2019
3ed9a67967cf fprintf: Avoid null dereference with NULL configs
568dae4bd498 printf: Fixup printing "const" early with "const void"
68f261d8dfff fprintf: Fix recursively printing named structs in --expand_types
139a3b337381 ostra: Initial python3 conversion
01276a7e8966 spec: Sync spec with fedora's
9f1f0628b9ad rpm: Add missing devel headers
989dc3f1ba0d cmake: Install missing devel headers
v1.13
Tue Apr 16 2019
See changes-v1.13 for a more verbose description of the changes.
0fb727166a0e pfunct: Strip inlines in the code generated for --compile
7b967744db7b emit: Emit the types for inline structs defined in pointer members
30526e2848db fprintf: Print relative offsets for inner pointer structs
cfa377c238f8 emit: Do not emit a forward declararion to a nameless struct
cf459ca16fb2 fprintf: Pretty print struct members that are pointers to nameless structs
09ed2e78befe pfunct: Emit definitions for pointers inside pointer to function args
e9fc2f647026 fullcircle: Check that we found the CFLAGS
05921c47f557 emit: Handle typedefs that are a pointer to typedefs
87af9839bf63 fullcircle: Try building from pfunct --compile and check types
c7fd9cc1fe97 pfunct: Fixup more return types
56c50b8dbe9b emit: Make find_fwd_decl a bit more robust
2bcb01fc2f9d fprintf: Handle single zero sized array member structs
0987266cd9e2 fprintf: Deal with zero sized arrays in the midle of a union
1101337a7450 fprintf: Deal with zero sized arrays in the middle of a struct
13aa13eb0ca4 fprintf: Don't reuse 'type' in multiple scopes in the same function
c8fc6f5a7a46 core: Use unnatural alignment of struct embedded in another to infer __packed__
6f0f9a881589 fprintf: Fixup multi-dimensional zero sized arrays const handling
9a4d71930467 fprintf: Allow suppressing the inferred __attribute__((__packed__))
ec935ee422b0 fprintf: Allow suppressing the output of force paddings at the end of structs
8471736f3c6c core: Cope with zero sized types when looking for natural alignment
986a3b58a869 fprintf: Only add bitfield forced paddings when alignment info available
49c27bdd6663 core: Allow the loaders to advertise features they have
dc6b9437a3a0 emit: Handle structs with DW_AT_alignment=1 meaning __packed__
f78633cfb949 core: Infer __packed__ for union struct members
75c52de9c6df core: Move packed_attribute_inferred from 'class' to 'type' class
1bb4527220f4 fprintf: Fixup const pointers
dc3d44196103 core: Improve the natural alignment calculation
ac32e5e908ba codiff: Fix comparision of multi-cu against single-cu files
f2641ce169d6 core: Take arrays into account when inferring if a struct is packed
85c99369631a fprintf: Do not add explicit padding when struct has __aligned__ attr
b5e8fab596d3 emit: Cover void ** as a function parameter
28a3bc7addad fprintf: Support packed enums
f77a442f09e3 fprintf: Do not print the __aligned__ attribute if asked
ea583dac52f0 fprintf: Print zero sized flat arrays as [], not [0]
f909f13dd724 fprintf: Fixup handling of unnamed bitfields
3247a777dcfc core: Infer if a struct is packed by the offsets/natural alignments
13e5b9fc00ee fprintf: Add unnamed bitfield padding at the end to rebuild original type
ccd67bdb205b fprintf: Print "const" for class members more early, in type__fprintf()
b42d77b0bbda fprintf: Print __attribute__((__aligned__(N))) for structs/classes
1c9c1d6bbd45 dwarf_loader: Store DW_AT_alignment if available in DW_TAG_{structure,union,class}_type
41c55858daf4 codiff: Add --quiet option
a104eb1ea11d fprintf: Notice explicit bitfield alignment modifications
75f32a24c7c7 codiff: Improve the comparision of anonymous struct members
6b1e43f2c1ac codiff: When comparing against a file with just one CU don't bother finding by name
15a754f224f7 core: Add nr_entries member to 'struct cus'
99750f244cb8 pfunct: Generate a valid return type for the --compile bodies
881aabd6fc22 reorganize: Introduce class__for_each_member_from_safe()
1b2e3389f304 reorganize: Introduce class__for_each_member_reverse()
10fef2916dce reorganize: Introduce class__for_each_member_continue()
e7a56ee8cc69 reorganize: Introduce class__for_each_member_from()
9a79bb6ced23 tag: Introduce tag__is_pointer_to()
45ad54594442 tag: Introduce tag__is_pointer()
89ce57a02e3a pdwtags: Find holes in structs
ce6f393bc9ea fprintf: Fixup the printing of const parameters
7aec7dd6c29c pfunct: Do not reconstruct external functions
163b873f81c8 pfunct: Do not reconstruct inline expansions of functions
ea83b780eca0 pfunct: Handle unnamed struct typedefs
e7ebc05d12e1 emit: Unwind the definitions for typedefs in type__emit_definitions()
093135b0bfd5 pfunct: Do not emit a type multiple times
3ce2c5216612 pfunct: Ask for generating compilable output that generates DWARF for types
e7a786540d83 pfunct: Make --expand_types/-b without -f expand types for all functions
9b2eadf97b44 pfunct: Follow const, restrict, volatile in --expand_types
f3f86f2f89b0 pfunct: Reconstruct function return types for --expand_types
a7d9c58cb81a fprintf: Add missing closing parens to the align attribute
d83d9f578fa0 dwarf_loader: Handle DW_TAG_label in inline expansions
73e545b144b4 dwarf_loader: Handle unsupported_tag in die__process_inline_expansion
fe590758cb3f class__find_holes: Zero out bit_hole/hole on member
863c2af6e9d7 reorganize: Disable the bitfield coalescing/moving steps
b95961db697a fprintf: Show statistics about holes due to forced alignments
ec772f21f681 fprintf: Show the number of forced alignments in a class
52d1c75ea437 btfdiff: Use --suppress_aligned_attribute with -F dwarf
6cd6a6bd8787 dwarves_fprintf: Allow suppressing the __attribute__((__aligned__(N))
f31ea292e3cb dwarf_loader: Store the DW_AT_alignment if available
c002873c4479 dwarves_fprintf: Move invariant printing of ; to outside if block
8ce85a1ad7f0 reorganize: Use class__find_holes() to recalculate holes
5d1c4029bd45 dwarves: Fix classification of byte/bit hole for aligned bitfield
78c110a7ea24 dwarves: Revert semantics of member bit/byte hole
b56fed297e5f dwarves_fprintf: Count bitfield member sizes separately
c0fdc5e685e9 dwarf_loader: Use DWARF recommended uniform bit offset scheme
5104d1bef384 loaders: Record CU's endianness in dwarf/btf/ctf loaders
975757bc8867 dwarves: Use bit sizes and bit/byte hole info in __class__fprintf
1838d3d7623e dwarves: Revamp bit/byte holes detection logic
03d9b6ebcac7 dwarf_loader: Fix bitfield fixup logic for DWARF
4abc59553918 btf_loader: Adjust negative bitfield offsets early on
41cf0e3cba0c dwarf_loader: Don't recode enums and use real enum size in calculations
55c96aaed8ce loaders: Strip away volatile/const/restrict when fixing bitfields
7005757fd573 libbpf: Sync in latest libbpf sources
69970fc77ec5 pahole: Filter out unions when looking for packable structs
fa963e1a8698 dwarves_fprintf: Print the bit_offset for inline enum bitfield class members
bb8350acf52f dwarves: Switch type_id_t from uint16_t to uint32_t
5375d06faf26 dwarves: Introduce type_id_t for use with the type IDs
f601f6725890 libctf: The type_ids returned are uint32_t fixup where it was uint16_t
c9b2ef034f89 dwarf: Add cu__add_tag_with_id() to stop using id == -1 to allocate id
762e7b58f447 dwarves: Change ptr_table__add() signature to allow for uint32_t returns
079e6890b788 dwarf_loader: Mark tag__recode_dwarf_bitfield() static
3526ebebd3ab pahole: Use 32-bit integers for type ID iterations within CU
3bd8da5202e4 libbpf: update reference to bring in btf_dedup fixes
a9afcc65fc8f btf_encoder: Don't special case packed enums
8f4f280163b7 btf_loader: Simplify fixup code by relying on BTF data more
be5173b4df0f dwarves: Fixup sizeof(long double) in bits in base_type_name_to_size table
5081ed507095 dwarves: Add _Float128 base_type
d52c9f9b9455 dwarf_loader: Fixup bitfield entry with same number of bits as its base_type
6586e423d4fa btf_loader: Fix bitfield fixup code
7daa4300d230 pahole: Complete list of base type names
6bcf0bd70305 btfdiff: Support specifying custom pahole location
88028b5d0c32 btfdiff: Use --show_private_classes with DWARF
e6c59bd11d3d libbpf: Build as PIC and statically link into libdwarves
cf4f3e282d64 cmake: Bump miminum required version to use OBJECT feature
5148be53dc65 btfdiff: Rename tmp files to contain the format used
dd3a7d3ab3e8 btf_encoder: run BTF deduplication before writing out to ELF
54106025cd14 libbtf: Fixup temp filename to .btf, not .btfe
e6dfd10bcbf3 libbpf: Build as shared lib
c234b6ca6e55 libbpf: Pull latest libbpf
fe4e1f799c55 btf_elf: Rename btf_elf__free() to btf_elf__delete()
6780c4334d55 btf: Rename 'struct btf' to 'struct btf_elf'
ca86e9416b8b pahole: use btf.h directly from libbpf
21507cd3e97b pahole: add libbpf as submodule under lib/bpf
c25ada500ddc pahole: Add build dir, config.h to .gitignore
a58c746c4c7e Fixup copyright notices for BTF files authored by Facebook engineers
e714d2eaa150 Adopt SPDX-License-Identifier
c86960dce55d btf_loader: We can set class_member->type_offset earlier
278b64c3eee0 btfdiff: Use diff's -p option to show the struct/union
1182664d6aa6 dwarves_fprintf: Handle negative bit_offsets in packed structs with bitfields
b0cf845e02c6 dwarves: Change type of bitfield_offset from uint8_t to int8_t
06e364bc62e7 btfdiff: Add utility to compare pahole output produced from DWARF and BTF
b79db4cab41c dwarves: add __int128 types in base_type_name_to_size
de3459cc0ebe btf_loader: BTF encodes the size of enums as bytes not bits
693347f8def7 btf_encoder: Fix void handling in FUNC_PROTO.
2d0b70664f3e dwarves_fprintf: Separate basic type stats into separate type__fprintf() method
18f5910f96e0 dwarves: Add type to tag helper
f2092f56586a btf: recognize BTF_KIND_FUNC in btf_loader
11766614096c btf: Fix kind_flag usage in btf_loader
68b93e6858ae dutil: Add missing string.h header include
851ef335e328 dutil: Drop 'noreturn' attribute for ____ilog2_NaN()
ab0cb33e54e8 btf_loader: Fixup class_member->bit_offset for !big_endian files
b24718fe27d3 dwarves: Fix documentation for class_memer->bitfield_size
3ffe5ba93b63 pahole: Do not apply 'struct class' filters to 'struct type'
da18bb340bee dwarves: Check if the tag is a 'struct class' in class__find_holes()
2a82d593be81 btf: Add kind_flag support for btf_loader
472256d3c57b btf_loader: Introduce a loader for the BTF format
93d6d0016523 dwarves: No need to print the "signed ", the name has it already
0a9bac9a3e8e dwarves: Relookup when searching for signed base types
a2cdc6c2a0a3 dutil: Adopt strstart() from the linux perf tools sources
3aa3fd506e6c btf: add func_proto support
8630ce404287 btf: fix struct/union/fwd types with kind_flag
65bd17abc72c btf: Allow multiple cu's in dwarf->btf conversion
d843945ba514 pahole: Search for unions as well with '-C'
da632a36862c dwarves: Introduce {cu,cus}__find_struct_or_union_by_name() methods
31664d60ad41 pahole: Show tagged enums as well when no class is specified
b18354f64cc2 btf: Generate correct struct bitfield member types
70ef8c7f07ff dwarves_fprintf: Set conf.cachelinep in union__fprintf() too
bfdea37668c6 dwarves_fprintf: Print the scope of variables
465110ec99d3 dwarves: Add the DWARF location to struct variable
c65f2cf4361e dwarves: Rename variable->location to ->scope
0d2511fd1d8e btf: Fix bitfield encoding
92417082aad3 MANIFEST: Add missing COPYING file
eb6bd05766f5 dwarf_loader: Process DW_AT_count in DW_TAG_subrange_type
v1.12
Thu Aug 16 2018
1ca2e351dfa1 README.btf: Add section on validating the .BTF section via the kernel
9eda5e8163ce README.btf: No need to use 'llvm.opts = -mattr=dwarfris' with elfutils >= 0.173
7818af53f64a dwarves: Add a README.btf file with steps to test the BTF encoder
f727c22191d0 dwarf_loader: Initial support for DW_TAG_partial_unit
e975ff247aa8 dwarves_fprintf: Print cacheline boundaries in multiple union members
68645f7facc2 btf: Add BTF support
81466af0d4f8 pahole: Show the file where a struct was used
2dd87be78bb2 dwarves_fprintf: Show offsets at union members
66cf3983e1ac README.DEBUG: Add an extra step to make the instructions cut'n'exec
2a092d61453c dwarves: Fix cus__load_files() success return value
02a456f5f54c pahole: Search and use running kernel vmlinux when no file is passed
5f057919a0c0 man-pages: Add entry for --hex
v1.11
Wed Jun 2017
5a57eb074170 man-pages: Update URL to the dwarves paper
b52386d041fa dwarves_fprintf: Find holes when expanding types
103e89bb257d dwarves_fprintf: Find holes on structs embedded in other structs
ab97c07a7ebe dwarves_fprintf: Fixup cacheline boundary printing on expanded structs
046ad67af383 dwarves_fprintf: Shorten class__fprintf() sig
44130bf70e1c dwarves: Update e-mail address
327757975b94 dwarf_loader: Add URL for template tags description
f4d5e21fd1b2 dwarf_loader: Tidy up template tags usage
e12bf9999944 dwarf_loader: Do not hash unsupported tags
3afcfbec9e08 dwarf_loader: Add DW_TAG_GNU_formal_parameter_pack stub in process_function
55d9b20dbaf6 dwarf_loader: Ignore DW_TAG_dwarf_procedure when processing functions
45618c7ec122 dwarf_loader: Initial support for DW_TAG_unspecified_type
658a238b9890 dwarf_loader: Stop emitting warnings about DW_TAG_call_site
0fbb39291d59 dwarf_loader: Add support for DW_TAG_restrict_type
9df42c68265d dwarves: Initial support for rvalue_reference_type
8af5ccd86d21 dwarves: Use cus__fprintf_load_files_err() in the remaining tools
10515a7c4db7 dwarves: Introduce cus__fprintf_load_files_err()
0e6463635082 pahole: Show more informative message when errno is properly set on error
2566cc2c8715 pdwtags: Show proper error messages for files it can't handle
9f3f67e78679 dwarves: Fix cus__load_files() error return
ae3a2720c3d3 dutil: Add ____ilog2_NaN declaration to silence compiler warning
0b81b5ad4743 Update version in CMakeLists.txt
79536f4f9587 cmake: Use INTERFACE_LINK_LIBRARIES
1decb1bc4a41 dwarf_loader: Check cu__find_type_by_ref result
956343d05a41 Add instructions on how to build with debug info
e71353c3fa0a dwarf_loader: Ignore DW_TAG_dwarf_procedure
189695907242 dwarves_fprintf: Add the missing GNU_ suffix to DWARF_TAG_ created by the GNU project
d973b1d5daf0 dwarf_fprintf: Handle DW_TAG_GNU_call_site{_parameter}
c23eab4b1253 dwarf_loader: Print unknown tags as an hex number
943a0de0679a dwarves_fprintf: DW_TAG_mutable_type doesn't exist.
a8e562a15767 dwarf_loader: Use obstack_zalloc when allocating tag
fd3838ae9aa3 dwarves: Stop using 'self'
5ecf1aab9e10 dwarf_loader: Support DW_FORM_data{4,8} for reading class member offsets
c4ccdd5ae63b dwarves_reorganize: Fix member type fixup
e31fda3063e3 dwarves_reorganize: Fixup calculation of bytes needed for bitfield
1e461ec7e0e8 dwarves_fprintf: Fix printf types on 64bit linux
222f0067a9c3 dwarves_fprintf: Don't ignore virtual data members
e512e3f9b36b dwarves: Update git url
8c6378fd8834 dwarves: Support static class data members
a54515fa6ee4 dwarves: Stop using 'self'
6035b0d91f19 rpm: Add missing BuildRequires: zlib-devel
be7b691756ff dwarf_loader: Don't stop processing after finding unsupported tag
v1.10
Wed May 30 2012
. Initial DWARF4 support, by Tom Tromey
. Add stubs for some new GNU Tags
. Fix build on older systems
. Fix a crash when pahole is called with -R -S, from Tal Kelrich
v1.9:
Ignore DW_TAG_template_{type,value}_parameter, fixing a bug reported at:
https://bugzilla.redhat.com/show_bug.cgi?id=654471
More work is needed to properly support these tags.
-----------------------------------------
After a long time without a new release because I was trying to get the CTF
support completed, and due to the very strong gravity force in the Linux kernel
perf tools, here it is 1.8, with lots of performance improvements, bug fixes
and changes to better use these tools in scripts.
For full details please take a look at the git changesets, repo available at:
http://git.kernel.org/cgit/devel/pahole/pahole.git
- Arnaldo
pahole:
. Allow list of structs to be passed to pahole.
E.g.: 'pahole -C str_node,strings'
Suggested by Zack Weinberg <zweinberg@mozilla.com>, for scripting.
. Introduce --hex to print offsets and sizes in hexadecimal
codiff:
. Improve detection of removal and addition of members in structs
. Detect changes in padding and the number of holes/bit_holes
pfunct:
. --no_parm_names
Because CTF doesn't encodes the names of the parameters and I want to
test the upcoming CTF function section code in ctftwdiff.
. pfunct --addr
Using an rbtree to find in which function the given addr is.
libdwarves:
. Greatly reduce the data structures footprint and lookup by recoding
the IDs as short integers, that was done to facilitate support for CTF
but benefited the core libraries greatly.
. Handle GCC support for vector instructions
So now it recognizes, as printed by pdwtags:
908 typedef int __m64 __attribute__ ((__vector_size__ (8))); size: 8
909 int array __attribute__ ((__vector_size__ (8))); size: 8
910 int array __attribute__ ((__vector_size__ (4))); size: 4
911 short int array __attribute__ ((__vector_size__ (2))); size: 2
912 char array __attribute__ ((__vector_size__ (1))); size: 1
. Destructors were added so that no leaks are left if this library is to
be used in other tools that don't end the program when done using this lib.
. Allow the tools to pass a callback that is used after loading each object
file (CU/Compile Unit), so that we can more quickly find tags and stop
the processing sooner, or at least delete the CU if it doesn't have anything
needed by the tool. This _greatly_ speeded up most of the tools.
. Tools now can pass a debug format "path", specifying the order it wants to
try, so that if a file have both DWARF and CTF, specifying 'ctf,dwarf' will
use the CTF info.
. Now the formatting routines are in a separate file, dwarves_fprintf.c. This
was done for organizational purposes but also to pave the way for multiple
formatting backends, so that we can print, for instance, in CSV the structs,
for easier scripting like done by several folks out there.
. Handle volatile typedef bitfields, like:
struct _GClosure {
volatile guint ref_count:15; /* 0:17 4 */
volatile guint meta_marshal:1; /* 0:16 4 */
volatile guint n_guards:1; /* 0:15 4 */
. Load java 'interfaces' as a struct/class.
. Fix buffer expansion bug, detected thanks to boost that provided things like:
virtual int undefine(class
grammar_helper<boost::spirit::grammar<boost::detail::graph::dot_skipper,
boost::spirit::parser_context<boost::spirit::nil, class
grammar<boost::detail::graph::dot_skipper,
boost::spirit::parser_context<boost::spirit::nil_t> > *); /*
linkage=_ZN5boost6spirit4impl14grammar_helperINS0_7grammarINS_6detail5graph11dot_skipperENS0_14parser_contextINS0_5nil_tEEEEES6_NS0_7scannerINS0_10multi_passISt16istream_i
*/
. Allow optional addr information loading, speeding up some apps that don't
use such addresses (or in modes where addrs aren't used) such as pahole.
. Use a obstacks, speeding up apps as measured with the perf tools.
. Support zero sized arrays in the middle of a struct.
. Fix padding calculation in the reorganize routines.
. Fix bitfield demotion in the reorganize routines.
. Support "using" pointing to data members (C++).
. Properly support pointers to const, reported by Jan Engelhardt <jengelh@medozas.de>:
. Support more compact DW_AT_data_member_location form, pointed out by Mark
Wielaard <mjw@redhat.com> and reported by Mike Snitzer <snitzer@redhat.com>
Experimental CTF support:
libdwarves was reorganized so that it can support multiple debugging formats,
with the first one being supported being the Compact C Type Format that comes
from the OpenSolaris world.
David S. Miller contributed an initial CTF decoder and from there I wrote an
encoder.
To test this a regression testing harness (regtest in the sources) that will
take files with DWARF info and from there encode its contents in CTF in another
ELF section in the same file (.SUN_ctf). Then it will decode both the DWARF
and CTF sections and compare the results for pahole running with some new
flags that cope with some subtleties in the way CTF encodes things.
--flat_arrays
We have just one dimension in CTF, with the total number of entries,
in DWARF we can express this, but not in CTF:
__u8 addr[0][6]; /* 4 0 */
So --flat_arrays will show it as:
__u8 addr[0]; /* 4 0 */
--show_private_classes
--fixup_silly_bitfields
To cope with things like 'char foo:8' that since CTF has only the
number of bits, can't be expressed as we don't know if it is a
bitfield or just a char without the ':8' suffix.
--first_obj_only
Look only at the first object file in a file with multiple object
files, like vmlinux. This is because the CTF support is not complete yet,
needing the merging of types in multiple object files to be done.
--classes_as_structs
CTF has only a type for structs, not for classes like DWARF (DW_TAG_class_type
is not present in CTF), so print them all as 'struct'.
Running with the above limitations produce just a few mismatches, related to
packed structs and enumerations and bitfields.