dwarf_loader: Ignore DW_TAG_variant_part for now to fix a segfault
[simple.debug.gz](https://github.com/acmel/dwarves/files/5257290/simple.debug.gz)
Simple.debug, a rust executable:
```
$ ~/dwarves/build/pahole simple.debug
die__process_function: tag not supported 0x2f (template_type_parameter)!
die__process_class: DW_TAG_variant_part (0x33) @ <0x220> not handled!
Segmentation fault (core dumped)
Added a XXX for looking into DW_TAG_variant_part later, with that:
$ pahole examples/rust/simple.debug
die__process_function: tag not supported 0x2f (template_type_parameter)!
die__process_class: tag not supported 0x33 (variant_part)!
die__create_new_enumeration: DW_TAG_subprogram (0x2e) @ <0x2da3> not handled!
struct (core::ptr::non_null::NonNull<u8>, core::alloc::layout::Layout) {
struct NonNull<u8> __0 __attribute__((__aligned__(8))); /* 0 8 */
struct Layout __1 __attribute__((__aligned__(8))); /* 8 16 */
/* size: 24, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 24 bytes */
} __attribute__((__aligned__(8)));
struct vtable {
/* size: 0, cachelines: 0, members: 0 */
} __attribute__((__aligned__(8)));
struct (&usize, &usize) {
usize * __0 __attribute__((__aligned__(8))); /* 0 8 */
usize * __1 __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &str {
u8 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct *const [u8] {
u8 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct *const [i32] {
i32 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct *mut [u8] {
u8 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &[u8] {
u8 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct (i32, f64) {
i32 __0 __attribute__((__aligned__(4))); /* 0 4 */
/* XXX 4 bytes hole, try to pack */
f64 __1 __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* sum members: 12, holes: 1, sum holes: 4 */
/* forced alignments: 2, forced holes: 1, sum forced holes: 4 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &[i32] {
i32 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &mut [u8] {
u8 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &[&str] {
struct &str * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &[core::fmt::rt::v1::Argument] {
struct Argument * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct &[core::fmt::ArgumentV1] {
struct ArgumentV1 * data_ptr __attribute__((__aligned__(8))); /* 0 8 */
usize length __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct Opaque {
/* size: 0, cachelines: 0, members: 0 */
} __attribute__((__aligned__(1)));
struct (usize, usize) {
usize __0 __attribute__((__aligned__(8))); /* 0 8 */
usize __1 __attribute__((__aligned__(8))); /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct (core::alloc::layout::Layout, usize) {
struct Layout __0 __attribute__((__aligned__(8))); /* 0 16 */
usize __1 __attribute__((__aligned__(8))); /* 16 8 */
/* size: 24, cachelines: 1, members: 2 */
/* forced alignments: 2 */
/* last cacheline: 24 bytes */
} __attribute__((__aligned__(8)));
struct (usize, bool) {
usize __0 __attribute__((__aligned__(8))); /* 0 8 */
bool __1 __attribute__((__aligned__(1))); /* 8 1 */
/* size: 16, cachelines: 1, members: 2 */
/* padding: 7 */
/* forced alignments: 2 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
struct backtrace_state {
const char * filename; /* 0 8 */
int threaded; /* 8 4 */
/* XXX 4 bytes hole, try to pack */
void * lock; /* 16 8 */
fileline fileline_fn; /* 24 8 */
void * fileline_data; /* 32 8 */
syminfo syminfo_fn; /* 40 8 */
void * syminfo_data; /* 48 8 */
int fileline_initialization_failed; /* 56 4 */
int lock_alloc; /* 60 4 */
/* --- cacheline 1 boundary (64 bytes) --- */
struct backtrace_freelist_struct * freelist; /* 64 8 */
/* size: 72, cachelines: 2, members: 10 */
/* sum members: 68, holes: 1, sum holes: 4 */
/* last cacheline: 8 bytes */
};
struct timespec {
__time_t tv_sec; /* 0 8 */
__syscall_slong_t tv_nsec; /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* last cacheline: 16 bytes */
};
struct stat {
__dev_t st_dev; /* 0 8 */
__ino_t st_ino; /* 8 8 */
__nlink_t st_nlink; /* 16 8 */
__mode_t st_mode; /* 24 4 */
__uid_t st_uid; /* 28 4 */
__gid_t st_gid; /* 32 4 */
int __pad0; /* 36 4 */
__dev_t st_rdev; /* 40 8 */
__off_t st_size; /* 48 8 */
__blksize_t st_blksize; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__blkcnt_t st_blocks; /* 64 8 */
struct timespec st_atim; /* 72 16 */
struct timespec st_mtim; /* 88 16 */
struct timespec st_ctim; /* 104 16 */
__syscall_slong_t __glibc_reserved[3]; /* 120 24 */
/* size: 144, cachelines: 3, members: 15 */
/* last cacheline: 16 bytes */
};
struct dl_phdr_info {
Elf64_Addr dlpi_addr; /* 0 8 */
const char * dlpi_name; /* 8 8 */
const Elf64_Phdr * dlpi_phdr; /* 16 8 */
Elf64_Half dlpi_phnum; /* 24 2 */
/* XXX 6 bytes hole, try to pack */
long long unsigned int dlpi_adds; /* 32 8 */
long long unsigned int dlpi_subs; /* 40 8 */
size_t dlpi_tls_modid; /* 48 8 */
void * dlpi_tls_data; /* 56 8 */
/* size: 64, cachelines: 1, members: 8 */
/* sum members: 58, holes: 1, sum holes: 6 */
};
struct backtrace_view {
const void * data; /* 0 8 */
void * base; /* 8 8 */
size_t len; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct dwarf_sections {
const unsigned char * data[9]; /* 0 72 */
/* --- cacheline 1 boundary (64 bytes) was 8 bytes ago --- */
size_t size[9]; /* 72 72 */
/* size: 144, cachelines: 3, members: 2 */
/* last cacheline: 16 bytes */
};
struct debug_section_info {
off_t offset; /* 0 8 */
size_t size; /* 8 8 */
const unsigned char * data; /* 16 8 */
int compressed; /* 24 4 */
/* size: 32, cachelines: 1, members: 4 */
/* padding: 4 */
/* last cacheline: 32 bytes */
};
struct elf_symbol {
const char * name; /* 0 8 */
uintptr_t address; /* 8 8 */
size_t size; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct elf_syminfo_data {
struct elf_syminfo_data * next; /* 0 8 */
struct elf_symbol * symbols; /* 8 8 */
size_t count; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct elf_ppc64_opd_data {
b_elf_addr addr; /* 0 8 */
const char * data; /* 8 8 */
size_t size; /* 16 8 */
struct backtrace_view view; /* 24 24 */
/* size: 48, cachelines: 1, members: 4 */
/* last cacheline: 48 bytes */
};
struct phdr_data {
struct backtrace_state * state; /* 0 8 */
backtrace_error_callback error_callback; /* 8 8 */
void * data; /* 16 8 */
fileline * fileline_fn; /* 24 8 */
int * found_sym; /* 32 8 */
int * found_dwarf; /* 40 8 */
const char * exe_filename; /* 48 8 */
int exe_descriptor; /* 56 4 */
/* size: 64, cachelines: 1, members: 8 */
/* padding: 4 */
};
struct backtrace_vector {
void * base; /* 0 8 */
size_t size; /* 8 8 */
size_t alc; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct dwarf_buf {
const char * name; /* 0 8 */
const unsigned char * start; /* 8 8 */
const unsigned char * buf; /* 16 8 */
size_t left; /* 24 8 */
int is_bigendian; /* 32 4 */
/* XXX 4 bytes hole, try to pack */
backtrace_error_callback error_callback; /* 40 8 */
void * data; /* 48 8 */
int reported_underflow; /* 56 4 */
/* size: 64, cachelines: 1, members: 8 */
/* sum members: 56, holes: 1, sum holes: 4 */
/* padding: 4 */
};
struct attr {
enum dwarf_attribute name; /* 0 4 */
enum dwarf_form form; /* 4 4 */
int64_t val; /* 8 8 */
/* size: 16, cachelines: 1, members: 3 */
/* last cacheline: 16 bytes */
};
struct abbrev {
uint64_t code; /* 0 8 */
enum dwarf_tag tag; /* 8 4 */
int has_children; /* 12 4 */
size_t num_attrs; /* 16 8 */
struct attr * attrs; /* 24 8 */
/* size: 32, cachelines: 1, members: 5 */
/* last cacheline: 32 bytes */
};
struct abbrevs {
size_t num_abbrevs; /* 0 8 */
struct abbrev * abbrevs; /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* last cacheline: 16 bytes */
};
struct attr_val {
enum attr_val_encoding encoding; /* 0 4 */
/* XXX 4 bytes hole, try to pack */
union {
uint64_t uint; /* 8 8 */
int64_t sint; /* 8 8 */
const char * string; /* 8 8 */
} u; /* 8 8 */
/* size: 16, cachelines: 1, members: 2 */
/* sum members: 12, holes: 1, sum holes: 4 */
/* last cacheline: 16 bytes */
};
struct line_header {
int version; /* 0 4 */
int addrsize; /* 4 4 */
unsigned int min_insn_len; /* 8 4 */
unsigned int max_ops_per_insn; /* 12 4 */
int line_base; /* 16 4 */
unsigned int line_range; /* 20 4 */
unsigned int opcode_base; /* 24 4 */
/* XXX 4 bytes hole, try to pack */
const unsigned char * opcode_lengths; /* 32 8 */
size_t dirs_count; /* 40 8 */
const char * * dirs; /* 48 8 */
size_t filenames_count; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
const char * * filenames; /* 64 8 */
/* size: 72, cachelines: 2, members: 12 */
/* sum members: 68, holes: 1, sum holes: 4 */
/* last cacheline: 8 bytes */
};
struct line_header_format {
int lnct; /* 0 4 */
enum dwarf_form form; /* 4 4 */
/* size: 8, cachelines: 1, members: 2 */
/* last cacheline: 8 bytes */
};
struct line {
uintptr_t pc; /* 0 8 */
const char * filename; /* 8 8 */
int lineno; /* 16 4 */
int idx; /* 20 4 */
/* size: 24, cachelines: 1, members: 4 */
/* last cacheline: 24 bytes */
};
struct line_vector {
struct backtrace_vector vec; /* 0 24 */
size_t count; /* 24 8 */
/* size: 32, cachelines: 1, members: 2 */
/* last cacheline: 32 bytes */
};
struct function {
const char * name; /* 0 8 */
const char * caller_filename; /* 8 8 */
int caller_lineno; /* 16 4 */
/* XXX 4 bytes hole, try to pack */
struct function_addrs * function_addrs; /* 24 8 */
size_t function_addrs_count; /* 32 8 */
/* size: 40, cachelines: 1, members: 5 */
/* sum members: 36, holes: 1, sum holes: 4 */
/* last cacheline: 40 bytes */
};
struct function_addrs {
uint64_t low; /* 0 8 */
uint64_t high; /* 8 8 */
struct function * function; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct function_vector {
struct backtrace_vector vec; /* 0 24 */
size_t count; /* 24 8 */
/* size: 32, cachelines: 1, members: 2 */
/* last cacheline: 32 bytes */
};
struct unit {
const unsigned char * unit_data; /* 0 8 */
size_t unit_data_len; /* 8 8 */
size_t unit_data_offset; /* 16 8 */
size_t low_offset; /* 24 8 */
size_t high_offset; /* 32 8 */
int version; /* 40 4 */
int is_dwarf64; /* 44 4 */
int addrsize; /* 48 4 */
/* XXX 4 bytes hole, try to pack */
off_t lineoff; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
uint64_t str_offsets_base; /* 64 8 */
uint64_t addr_base; /* 72 8 */
uint64_t rnglists_base; /* 80 8 */
const char * filename; /* 88 8 */
const char * comp_dir; /* 96 8 */
const char * abs_filename; /* 104 8 */
struct abbrevs abbrevs; /* 112 16 */
/* --- cacheline 2 boundary (128 bytes) --- */
struct line * lines; /* 128 8 */
size_t lines_count; /* 136 8 */
struct function_addrs * function_addrs; /* 144 8 */
size_t function_addrs_count; /* 152 8 */
/* size: 160, cachelines: 3, members: 20 */
/* sum members: 156, holes: 1, sum holes: 4 */
/* last cacheline: 32 bytes */
};
struct unit_addrs {
uint64_t low; /* 0 8 */
uint64_t high; /* 8 8 */
struct unit * u; /* 16 8 */
/* size: 24, cachelines: 1, members: 3 */
/* last cacheline: 24 bytes */
};
struct unit_addrs_vector {
struct backtrace_vector vec; /* 0 24 */
size_t count; /* 24 8 */
/* size: 32, cachelines: 1, members: 2 */
/* last cacheline: 32 bytes */
};
struct unit_vector {
struct backtrace_vector vec; /* 0 24 */
size_t count; /* 24 8 */
/* size: 32, cachelines: 1, members: 2 */
/* last cacheline: 32 bytes */
};
struct dwarf_data {
struct dwarf_data * next; /* 0 8 */
struct dwarf_data * altlink; /* 8 8 */
uintptr_t base_address; /* 16 8 */
struct unit_addrs * addrs; /* 24 8 */
size_t addrs_count; /* 32 8 */
struct unit * * units; /* 40 8 */
size_t units_count; /* 48 8 */
struct dwarf_sections dwarf_sections; /* 56 144 */
/* --- cacheline 3 boundary (192 bytes) was 8 bytes ago --- */
int is_bigendian; /* 200 4 */
/* XXX 4 bytes hole, try to pack */
struct function_vector fvec; /* 208 32 */
/* size: 240, cachelines: 4, members: 10 */
/* sum members: 236, holes: 1, sum holes: 4 */
/* last cacheline: 48 bytes */
};
struct pcrange {
uint64_t lowpc; /* 0 8 */
int have_lowpc; /* 8 4 */
int lowpc_is_addr_index; /* 12 4 */
uint64_t highpc; /* 16 8 */
int have_highpc; /* 24 4 */
int highpc_is_relative; /* 28 4 */
int highpc_is_addr_index; /* 32 4 */
/* XXX 4 bytes hole, try to pack */
uint64_t ranges; /* 40 8 */
int have_ranges; /* 48 4 */
int ranges_is_index; /* 52 4 */
/* size: 56, cachelines: 1, members: 10 */
/* sum members: 52, holes: 1, sum holes: 4 */
/* last cacheline: 56 bytes */
};
struct stat64 {
__dev_t st_dev; /* 0 8 */
__ino64_t st_ino; /* 8 8 */
__nlink_t st_nlink; /* 16 8 */
__mode_t st_mode; /* 24 4 */
__uid_t st_uid; /* 28 4 */
__gid_t st_gid; /* 32 4 */
int __pad0; /* 36 4 */
__dev_t st_rdev; /* 40 8 */
__off_t st_size; /* 48 8 */
__blksize_t st_blksize; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
__blkcnt64_t st_blocks; /* 64 8 */
struct timespec st_atim; /* 72 16 */
struct timespec st_mtim; /* 88 16 */
struct timespec st_ctim; /* 104 16 */
__syscall_slong_t __glibc_reserved[3]; /* 120 24 */
/* size: 144, cachelines: 3, members: 15 */
/* last cacheline: 16 bytes */
};
Reported-by: Tom de Vries
Bugtracker: https://github.com/acmel/dwarves/issues/9#issuecomment-696277814
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 file changed
