#include <elf.h>
#include <errno.h>
#include <gelf.h>
#include <fcntl.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <linux/list.h>
#include "callchain.h"
#include "thread.h"
#include "session.h"
#include "perf_regs.h"
#include "unwind.h"
#include "symbol.h"
#include "util.h"
#include "debug.h"
#include "asm/bug.h"
#include "dso.h"
#include <libunwind.h>
#include <libunwind-ptrace.h>

Include dependency graph for unwind-libunwind-local.c:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	unwind_info

struct	table_entry

struct	eh_frame_hdr

Macros
#define	dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)

#define	dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)

#define	DW_EH_PE_FORMAT_MASK 0x0f /* format of the encoded value */

#define	DW_EH_PE_APPL_MASK 0x70 /* how the value is to be applied */

#define	DW_EH_PE_omit 0xff

#define	DW_EH_PE_ptr 0x00 /* pointer-sized unsigned value */

#define	DW_EH_PE_udata4 0x03 /* unsigned 32-bit value */

#define	DW_EH_PE_udata8 0x04 /* unsigned 64-bit value */

#define	DW_EH_PE_sdata4 0x0b /* signed 32-bit value */

#define	DW_EH_PE_sdata8 0x0c /* signed 64-bit value */

#define	DW_EH_PE_absptr 0x00 /* absolute value */

#define	DW_EH_PE_pcrel 0x10 /* rel. to addr. of encoded value */

#define	DW_EH_PE_funcrel 0x40 /* start-of-procedure-relative */

#define	DW_EH_PE_aligned 0x50 /* aligned pointer */

#define	dw_read(ptr, type, end)

#define	dw_read_encoded_value(ptr, end, enc)

Functions
int UNW_OBJ()	dwarf_search_unwind_table (unw_addr_space_t as, unw_word_t ip, unw_dyn_info_t di, unw_proc_info_t pi, int need_unwind_info, void *arg)

int UNW_OBJ()	dwarf_find_debug_frame (int found, unw_dyn_info_t di_debug, unw_word_t ip, unw_word_t segbase, const char obj_name, unw_word_t start, unw_word_t end)

static int	__dw_read_encoded_value (u8 *p, u8 end, u64 *val, u8 encoding)

static u64	elf_section_offset (int fd, const char *name)

static int	elf_is_exec (int fd, const char *name)

static int	unwind_spec_ehframe (struct dso dso, struct machine machine, u64 offset, u64 table_data, u64 segbase, u64 *fde_count)

static int	read_unwind_spec_eh_frame (struct dso dso, struct machine machine, u64 table_data, u64 segbase, u64 *fde_count)

static int	read_unwind_spec_debug_frame (struct dso dso, struct machine machine, u64 *offset)

static struct map *	find_map (unw_word_t ip, struct unwind_info *ui)

static int	find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t pi, int need_unwind_info, void arg)

static int	access_fpreg (unw_addr_space_t __maybe_unused as, unw_regnum_t __maybe_unused num, unw_fpreg_t __maybe_unused val, int __maybe_unused __write, void __maybe_unused arg)

static int	get_dyn_info_list_addr (unw_addr_space_t __maybe_unused as, unw_word_t __maybe_unused dil_addr, void __maybe_unused arg)

static int	resume (unw_addr_space_t __maybe_unused as, unw_cursor_t __maybe_unused cu, void __maybe_unused arg)

static int	get_proc_name (unw_addr_space_t __maybe_unused as, unw_word_t __maybe_unused addr, char __maybe_unused bufp, size_t __maybe_unused buf_len, unw_word_t __maybe_unused offp, void __maybe_unused *arg)

static int	access_dso_mem (struct unwind_info ui, unw_word_t addr, unw_word_t data)

static int	access_mem (unw_addr_space_t __maybe_unused as, unw_word_t addr, unw_word_t valp, int __write, void arg)

static int	access_reg (unw_addr_space_t __maybe_unused as, unw_regnum_t regnum, unw_word_t valp, int __write, void arg)

static void	put_unwind_info (unw_addr_space_t __maybe_unused as, unw_proc_info_t pi __maybe_unused, void arg __maybe_unused)

static int	entry (u64 ip, struct thread thread, unwind_entry_cb_t cb, void arg)

static void	display_error (int err)

static int	_unwind__prepare_access (struct thread *thread)

static void	_unwind__flush_access (struct thread *thread)

static void	_unwind__finish_access (struct thread *thread)

static int	get_entries (struct unwind_info ui, unwind_entry_cb_t cb, void arg, int max_stack)

static int	_unwind__get_entries (unwind_entry_cb_t cb, void arg, struct thread thread, struct perf_sample *data, int max_stack)

Variables
struct eh_frame_hdr	__packed

static unw_accessors_t	accessors

static struct unwind_libunwind_ops	_unwind_libunwind_ops

struct unwind_libunwind_ops *	local_unwind_libunwind_ops = &_unwind_libunwind_ops

Macro Definition Documentation

◆ DW_EH_PE_absptr

#define DW_EH_PE_absptr 0x00 /* absolute value */

Definition at line 73 of file unwind-libunwind-local.c.

◆ DW_EH_PE_aligned

#define DW_EH_PE_aligned 0x50 /* aligned pointer */

Definition at line 82 of file unwind-libunwind-local.c.

◆ DW_EH_PE_APPL_MASK

#define DW_EH_PE_APPL_MASK 0x70 /* how the value is to be applied */

Definition at line 62 of file unwind-libunwind-local.c.

◆ DW_EH_PE_FORMAT_MASK

#define DW_EH_PE_FORMAT_MASK 0x0f /* format of the encoded value */

Definition at line 61 of file unwind-libunwind-local.c.

◆ DW_EH_PE_funcrel

#define DW_EH_PE_funcrel 0x40 /* start-of-procedure-relative */

Definition at line 81 of file unwind-libunwind-local.c.

◆ DW_EH_PE_omit

#define DW_EH_PE_omit 0xff

Definition at line 65 of file unwind-libunwind-local.c.

◆ DW_EH_PE_pcrel

#define DW_EH_PE_pcrel 0x10 /* rel. to addr. of encoded value */

Definition at line 74 of file unwind-libunwind-local.c.

◆ DW_EH_PE_ptr

#define DW_EH_PE_ptr 0x00 /* pointer-sized unsigned value */

Definition at line 66 of file unwind-libunwind-local.c.

◆ DW_EH_PE_sdata4

#define DW_EH_PE_sdata4 0x0b /* signed 32-bit value */

Definition at line 69 of file unwind-libunwind-local.c.

◆ DW_EH_PE_sdata8

#define DW_EH_PE_sdata8 0x0c /* signed 64-bit value */

Definition at line 70 of file unwind-libunwind-local.c.

◆ DW_EH_PE_udata4

#define DW_EH_PE_udata4 0x03 /* unsigned 32-bit value */

Definition at line 67 of file unwind-libunwind-local.c.

◆ DW_EH_PE_udata8

#define DW_EH_PE_udata8 0x04 /* unsigned 64-bit value */

Definition at line 68 of file unwind-libunwind-local.c.

◆ dw_read

#define dw_read	(	ptr,
		type,
		end
	)

Value:

({  \
    type *__p = (type *) ptr;   \
    type  __v;          \
    if ((__p + 1) > (type *) end)   \
        return -EINVAL;     \
    __v = *__p++;           \
    ptr = (typeof(ptr)) __p;    \
    __v;                \
    })

Definition at line 100 of file unwind-libunwind-local.c.

◆ dw_read_encoded_value

#define dw_read_encoded_value	(	ptr,
		end,
		enc
	)

Value:

({          \
    u64 __v;                        \
    if (__dw_read_encoded_value(&ptr, end, &__v, enc)) {    \
        return -EINVAL;                                 \
    }                                                       \
    __v;                                                    \
    })

Definition at line 162 of file unwind-libunwind-local.c.

◆ dwarf_find_debug_frame

#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)

Definition at line 59 of file unwind-libunwind-local.c.

◆ dwarf_search_unwind_table

#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)

Definition at line 50 of file unwind-libunwind-local.c.

Function Documentation

◆ __dw_read_encoded_value()

static int __dw_read_encoded_value	(	u8 **	p,
		u8 *	end,
		u64 *	val,
		u8	encoding
	)

static

Definition at line 110 of file unwind-libunwind-local.c.

◆ _unwind__finish_access()

static void _unwind__finish_access ( struct thread * thread )

static

Definition at line 638 of file unwind-libunwind-local.c.

◆ _unwind__flush_access()

static void _unwind__flush_access ( struct thread * thread )

static

Definition at line 631 of file unwind-libunwind-local.c.

◆ _unwind__get_entries()

static int _unwind__get_entries	(	unwind_entry_cb_t	cb,
		void *	arg,
		struct thread *	thread,
		struct perf_sample *	data,
		int	max_stack
	)

static

Definition at line 709 of file unwind-libunwind-local.c.

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◆ _unwind__prepare_access()

static int _unwind__prepare_access ( struct thread * thread )

static

Definition at line 617 of file unwind-libunwind-local.c.

◆ access_dso_mem()

static int access_dso_mem	(	struct unwind_info *	ui,
		unw_word_t	addr,
		unw_word_t *	data
	)

static

Definition at line 463 of file unwind-libunwind-local.c.

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◆ access_fpreg()

static int access_fpreg	(	unw_addr_space_t __maybe_unused	as,
		unw_regnum_t __maybe_unused	num,
		unw_fpreg_t __maybe_unused *	val,
		int __maybe_unused	__write,
		void __maybe_unused *	arg
	)

static

Definition at line 428 of file unwind-libunwind-local.c.

◆ access_mem()

static int access_mem	(	unw_addr_space_t __maybe_unused	as,
		unw_word_t	addr,
		unw_word_t *	valp,
		int	__write,
		void *	arg
	)

static

Definition at line 484 of file unwind-libunwind-local.c.

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◆ access_reg()

static int access_reg	(	unw_addr_space_t __maybe_unused	as,
		unw_regnum_t	regnum,
		unw_word_t *	valp,
		int	__write,
		void *	arg
	)

static

Definition at line 530 of file unwind-libunwind-local.c.

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◆ display_error()

static void display_error ( int err )

static

Definition at line 589 of file unwind-libunwind-local.c.

◆ dwarf_find_debug_frame()

int UNW_OBJ() dwarf_find_debug_frame	(	int	found,
		unw_dyn_info_t *	di_debug,
		unw_word_t	ip,
		unw_word_t	segbase,
		const char *	obj_name,
		unw_word_t	start,
		unw_word_t	end
	)

◆ dwarf_search_unwind_table()

int UNW_OBJ() dwarf_search_unwind_table	(	unw_addr_space_t	as,
		unw_word_t	ip,
		unw_dyn_info_t *	di,
		unw_proc_info_t *	pi,
		int	need_unwind_info,
		void *	arg
	)

◆ elf_is_exec()

static int elf_is_exec	(	int	fd,
		const char *	name
	)

static

Definition at line 196 of file unwind-libunwind-local.c.

◆ elf_section_offset()

static u64 elf_section_offset	(	int	fd,
		const char *	name
	)

static

Definition at line 170 of file unwind-libunwind-local.c.

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◆ entry()

static int entry	(	u64	ip,
		struct thread *	thread,
		unwind_entry_cb_t	cb,
		void *	arg
	)

static

Definition at line 571 of file unwind-libunwind-local.c.

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◆ find_map()

static struct map* find_map	(	unw_word_t	ip,
		struct unwind_info *	ui
	)

static

Definition at line 366 of file unwind-libunwind-local.c.

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◆ find_proc_info()

static int find_proc_info	(	unw_addr_space_t	as,
		unw_word_t	ip,
		unw_proc_info_t *	pi,
		int	need_unwind_info,
		void *	arg
	)

static

Definition at line 373 of file unwind-libunwind-local.c.

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◆ get_dyn_info_list_addr()

static int get_dyn_info_list_addr	(	unw_addr_space_t __maybe_unused	as,
		unw_word_t __maybe_unused *	dil_addr,
		void __maybe_unused *	arg
	)

static

Definition at line 438 of file unwind-libunwind-local.c.

◆ get_entries()

static int get_entries	(	struct unwind_info *	ui,
		unwind_entry_cb_t	cb,
		void *	arg,
		int	max_stack
	)

static

Definition at line 645 of file unwind-libunwind-local.c.

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◆ get_proc_name()

static int get_proc_name	(	unw_addr_space_t __maybe_unused	as,
		unw_word_t __maybe_unused	addr,
		char __maybe_unused *	bufp,
		size_t __maybe_unused	buf_len,
		unw_word_t __maybe_unused *	offp,
		void __maybe_unused *	arg
	)

static

Definition at line 454 of file unwind-libunwind-local.c.

◆ put_unwind_info()

static void put_unwind_info	(	unw_addr_space_t __maybe_unused	as,
		unw_proc_info_t *pi	__maybe_unused,
		void *arg	__maybe_unused
	)

static

Definition at line 564 of file unwind-libunwind-local.c.

◆ read_unwind_spec_debug_frame()

static int read_unwind_spec_debug_frame	(	struct dso *	dso,
		struct machine *	machine,
		u64 *	offset
	)

static

Definition at line 298 of file unwind-libunwind-local.c.

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◆ read_unwind_spec_eh_frame()

static int read_unwind_spec_eh_frame	(	struct dso *	dso,
		struct machine *	machine,
		u64 *	table_data,
		u64 *	segbase,
		u64 *	fde_count
	)

static

Definition at line 271 of file unwind-libunwind-local.c.

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◆ resume()

static int resume	(	unw_addr_space_t __maybe_unused	as,
		unw_cursor_t __maybe_unused *	cu,
		void __maybe_unused *	arg
	)

static

Definition at line 445 of file unwind-libunwind-local.c.

◆ unwind_spec_ehframe()

static int unwind_spec_ehframe	(	struct dso *	dso,
		struct machine *	machine,
		u64	offset,
		u64 *	table_data,
		u64 *	segbase,
		u64 *	fde_count
	)

static

Definition at line 248 of file unwind-libunwind-local.c.

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Variable Documentation

◆ __packed

struct eh_frame_hdr __packed

◆ _unwind_libunwind_ops

struct unwind_libunwind_ops _unwind_libunwind_ops

static

Initial value:

= {
    .prepare_access = _unwind__prepare_access,
    .flush_access   = _unwind__flush_access,
    .finish_access  = _unwind__finish_access,
    .get_entries    = _unwind__get_entries,
}

Definition at line 729 of file unwind-libunwind-local.c.

◆ accessors

unw_accessors_t accessors

static

Initial value:

= {
    .find_proc_info     = find_proc_info,
    .put_unwind_info    = put_unwind_info,
    .get_dyn_info_list_addr = get_dyn_info_list_addr,
    .access_mem     = access_mem,
    .access_reg     = access_reg,
    .access_fpreg       = access_fpreg,
    .resume         = resume,
    .get_proc_name      = get_proc_name,
}

Definition at line 606 of file unwind-libunwind-local.c.

◆ local_unwind_libunwind_ops

struct unwind_libunwind_ops* local_unwind_libunwind_ops = &_unwind_libunwind_ops

Definition at line 738 of file unwind-libunwind-local.c.

Classes

Macros

Functions

Variables

Macro Definition Documentation

◆ DW_EH_PE_absptr

◆ DW_EH_PE_aligned

◆ DW_EH_PE_APPL_MASK

◆ DW_EH_PE_FORMAT_MASK

◆ DW_EH_PE_funcrel

◆ DW_EH_PE_omit

◆ DW_EH_PE_pcrel

◆ DW_EH_PE_ptr

◆ DW_EH_PE_sdata4

◆ DW_EH_PE_sdata8

◆ DW_EH_PE_udata4

◆ DW_EH_PE_udata8

◆ dw_read

◆ dw_read_encoded_value

◆ dwarf_find_debug_frame

◆ dwarf_search_unwind_table

Function Documentation

◆ __dw_read_encoded_value()

◆ _unwind__finish_access()

◆ _unwind__flush_access()

◆ _unwind__get_entries()

◆ _unwind__prepare_access()

◆ access_dso_mem()

◆ access_fpreg()

◆ access_mem()

◆ access_reg()

◆ display_error()

◆ dwarf_find_debug_frame()

◆ dwarf_search_unwind_table()

◆ elf_is_exec()

◆ elf_section_offset()

◆ entry()

◆ find_map()

◆ find_proc_info()

◆ get_dyn_info_list_addr()

◆ get_entries()

◆ get_proc_name()

◆ put_unwind_info()

◆ read_unwind_spec_debug_frame()

◆ read_unwind_spec_eh_frame()

◆ resume()

◆ unwind_spec_ehframe()

Variable Documentation

◆ __packed

◆ _unwind_libunwind_ops

◆ accessors

◆ local_unwind_libunwind_ops