my_stacktrace.h File Reference

#include <stddef.h>
#include <sys/types.h>
#include "my_compiler.h"
#include "my_config.h"
#include "my_inttypes.h"
#include "my_macros.h"

Go to the source code of this file.

Macros
#define	HAVE_STACKTRACE   1

Functions
void	my_init_stacktrace ()
void	my_print_stacktrace (const uchar *stack_bottom, ulong thread_stack)
void	my_safe_puts_stderr (const char *val, size_t max_len)
void	my_write_core (int sig)
char *	my_safe_itoa (int base, longlong val, char *buf)
	Async-signal-safe utility functions used by signal handler routines. More...
char *	my_safe_utoa (int base, ulonglong val, char *buf)
	Converts a ulonglong value to string. More...
size_t	my_safe_snprintf (char *to, size_t n, const char *fmt,...)
	A (very) limited version of snprintf. More...
size_t	my_safe_printf_stderr (const char *fmt,...)
	A (very) limited version of snprintf, which writes the result to STDERR. More...
size_t	my_write_stderr (const void *buf, size_t count)
	Writes up to count bytes from buffer to STDERR. More...
void	my_safe_print_system_time ()
	Writes system time to STDERR without allocating new memory. More...

Macro Definition Documentation

HAVE_STACKTRACE

#define HAVE_STACKTRACE   1

Function Documentation

my_init_stacktrace()

void my_init_stacktrace

(

)

my_print_stacktrace()

void my_print_stacktrace	(	const uchar *	stack_bottom,
		ulong	thread_stack
	)

my_safe_itoa()

char * my_safe_itoa	(	int	base,
		longlong	val,
		char *	buf
	)

Async-signal-safe utility functions used by signal handler routines.

Declared here in order to unit-test them. These are not general-purpose, but tailored to the signal handling routines. Converts a longlong value to string.

Parameters

base	10 for decimal, 16 for hex values (0..9a..f)
val	The value to convert
buf	Assumed to point to the end of the buffer.

Returns

Pointer to the first character of the converted string. Negative values: for base-10 the return string will be prepended with '-' for base-16 the return string will contain 16 characters Implemented with simplicity, and async-signal-safety in mind.

my_safe_print_system_time()

void my_safe_print_system_time

(

)

Writes system time to STDERR without allocating new memory.

my_safe_printf_stderr()

size_t my_safe_printf_stderr	(	const char *	fmt,
			...
	)

A (very) limited version of snprintf, which writes the result to STDERR.

See also

my_safe_snprintf Implemented with simplicity, and async-signal-safety in mind.

Note

Has an internal buffer capacity of 512 bytes, which should suffice for our signal handling routines.

my_safe_puts_stderr()

void my_safe_puts_stderr	(	const char *	val,
		size_t	max_len
	)

my_safe_snprintf()

size_t my_safe_snprintf	(	char *	to,
		size_t	n,
		const char *	fmt,
			...
	)

A (very) limited version of snprintf.

Parameters

to	Destination buffer.
n	Size of destination buffer.
fmt	printf() style format string.

Returns

Number of bytes written, including terminating '\0' Supports 'd' 'i' 'u' 'x' 'p' 's' conversion. Supports 'l' and 'll' modifiers for integral types. Does not support any width/precision. Implemented with simplicity, and async-signal-safety in mind.

my_safe_utoa()

char * my_safe_utoa	(	int	base,
		ulonglong	val,
		char *	buf
	)

Converts a ulonglong value to string.

Parameters

base	10 for decimal, 16 for hex values (0..9a..f)
val	The value to convert
buf	Assumed to point to the end of the buffer.

Returns

Pointer to the first character of the converted string. Implemented with simplicity, and async-signal-safety in mind.

my_write_core()

void my_write_core

(

int

sig

)

my_write_stderr()

size_t my_write_stderr	(	const void *	buf,
		size_t	count
	)

Writes up to count bytes from buffer to STDERR.

Implemented with simplicity, and async-signal-safety in mind.

Parameters

buf	Buffer containing data to be written.
count	Number of bytes to write.

Returns

Number of bytes written.