* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
+ * Copyright (c) 2001-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <errno.h>
#include <time.h>
#include <sys/time.h>
-#include <asm/unistd.h>
#include "kernel_types.h"
#include "mpers_type.h"
#include "gcc_compat.h"
+#include "sysent.h"
#ifndef HAVE_STRERROR
const char *strerror(int);
#define USE_SEIZE 1
/* To force NOMMU build, set to 1 */
#define NOMMU_SYSTEM 0
-/*
- * Set to 1 to use speed-optimized vfprintf implementation.
- * It results in strace using about 5% less CPU in user space
- * (compared to glibc version).
- * But strace spends a lot of time in kernel space,
- * so overall it does not appear to be a significant win.
- * Thus disabled by default.
- */
-#define USE_CUSTOM_PRINTF 0
#ifndef ERESTARTSYS
# define ERESTARTSYS 512
# define PERSONALITY2_INCLUDE_FUNCS "empty.h"
#endif
-typedef struct sysent {
- unsigned nargs;
- int sys_flags;
- int sen;
- int (*sys_func)();
- const char *sys_name;
-} struct_sysent;
-
typedef struct ioctlent {
const char *symbol;
unsigned int code;
} struct_ioctlent;
-struct fault_opts {
+struct inject_opts {
uint16_t first;
uint16_t step;
- uint16_t err;
+ uint16_t signo;
+ int rval;
};
+#define MAX_ERRNO_VALUE 4095
+#define INJECT_OPTS_RVAL_DEFAULT (-(MAX_ERRNO_VALUE + 1))
+
/* Trace Control Block */
struct tcb {
int flags; /* See below for TCB_ values */
void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
- struct fault_opts *fault_vec[SUPPORTED_PERSONALITIES];
+ struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
struct timeval stime; /* System time usage as of last process wait */
struct timeval dtime; /* Delta for system time usage */
struct timeval etime; /* Syscall entry time */
#define TCB_ATTACHED 0x08 /* We attached to it already */
#define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
#define TCB_FILTERED 0x20 /* This system call has been filtered out */
-#define TCB_FAULT_INJ 0x40 /* A syscall fault has been injected */
+#define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
#define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
#define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
#define QUAL_RAW 0x008 /* print all args in hex for this syscall */
-#define QUAL_FAULT 0x010 /* fail this system call on purpose */
+#define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
#define QUAL_SIGNAL 0x100 /* report events with this signal */
#define QUAL_READ 0x200 /* dump data read from this file descriptor */
#define QUAL_WRITE 0x400 /* dump data written to this file descriptor */
extern const struct xlat addrfams[];
extern const struct xlat at_flags[];
+extern const struct xlat clocknames[];
extern const struct xlat dirent_types[];
extern const struct xlat evdev_abs[];
extern const struct xlat msg_flags[];
+extern const struct xlat netlink_protocols[];
extern const struct xlat open_access_modes[];
extern const struct xlat open_mode_flags[];
extern const struct xlat resource_flags[];
+extern const struct xlat setns_types[];
+extern const struct xlat sg_io_info[];
extern const struct xlat socketlayers[];
extern const struct xlat whence_codes[];
#define RVAL_DECODED 0100 /* syscall decoding finished */
-#define TRACE_FILE 001 /* Trace file-related syscalls. */
-#define TRACE_IPC 002 /* Trace IPC-related syscalls. */
-#define TRACE_NETWORK 004 /* Trace network-related syscalls. */
-#define TRACE_PROCESS 010 /* Trace process-related syscalls. */
-#define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
-#define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
-#define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */
-#define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */
-#define STACKTRACE_INVALIDATE_CACHE 0400 /* Trigger proc/maps cache updating */
-#define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */
-#define TRACE_INDIRECT_SUBCALL 02000 /* Syscall is an indirect socket/ipc subcall. */
-#define COMPAT_SYSCALL_TYPES 04000 /* A compat syscall that uses compat types. */
-
#define IOCTL_NUMBER_UNKNOWN 0
#define IOCTL_NUMBER_HANDLED 1
#define IOCTL_NUMBER_STOP_LOOKUP 010
ATTRIBUTE_ALLOC_SIZE((2, 3));
char *xstrdup(const char *str) ATTRIBUTE_MALLOC;
-#if USE_CUSTOM_PRINTF
-/*
- * See comment in vsprintf.c for allowed formats.
- * Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u.
- */
-int strace_vfprintf(FILE *fp, const char *fmt, va_list args);
-#else
-# define strace_vfprintf vfprintf
-#endif
-
extern int read_int_from_file(const char *, int *);
extern void set_sortby(const char *);
extern void set_overhead(int);
extern void print_pc(struct tcb *);
-extern int trace_syscall(struct tcb *);
+extern int trace_syscall(struct tcb *, unsigned int *);
extern void count_syscall(struct tcb *, const struct timeval *);
extern void call_summary(FILE *);
extern void clear_regs(void);
-extern void get_regs(pid_t pid);
-extern int get_scno(struct tcb *tcp);
+extern int get_scno(struct tcb *);
+extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
+
/**
* Convert syscall number to syscall name.
*
extern void pathtrace_select(const char *);
extern int pathtrace_match(struct tcb *);
extern int getfdpath(struct tcb *, int, char *, unsigned);
+extern unsigned long getfdinode(struct tcb *, int);
extern enum sock_proto getfdproto(struct tcb *, int);
extern const char *xlookup(const struct xlat *, const uint64_t);
}
extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
+/*
+ * Returns STR if it does not start with PREFIX,
+ * or a pointer to the first char in STR after PREFIX.
+ * The length of PREFIX is specified by PREFIX_LEN.
+ */
+static inline const char *
+str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
+{
+ return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
+}
+
+#define STR_STRIP_PREFIX(str, prefix) \
+ str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
+
#define QUOTE_0_TERMINATED 0x01
#define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
#define QUOTE_OMIT_TRAILING_0 0x08
+#define QUOTE_FORCE_HEX 0x10
extern int string_quote(const char *, char *, unsigned int, unsigned int);
extern int print_quoted_string(const char *, unsigned int, unsigned int);
extern void addflags(const struct xlat *, uint64_t);
extern int printflags64(const struct xlat *, uint64_t, const char *);
extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
-extern const char *sprinttime(time_t);
+extern const char *sprinttime(long long sec);
+extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
+extern const char *sprinttime_usec(long long sec, unsigned long long usec);
extern void print_symbolic_mode_t(unsigned int);
extern void print_numeric_umode_t(unsigned short);
extern void print_numeric_long_umask(unsigned long);
+extern void print_dev_t(unsigned long long dev);
+extern void print_abnormal_hi(kernel_ulong_t);
extern void
dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
printpath(struct tcb *, kernel_ulong_t addr);
#define TIMESPEC_TEXT_BUFSIZE \
- (sizeof(intmax_t)*3 * 2 + sizeof("{tv_sec=%jd, tv_nsec=%jd}"))
+ (sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
extern void printfd(struct tcb *, int);
extern void print_sockaddr(struct tcb *tcp, const void *, int);
-extern bool print_sockaddr_by_inode(const unsigned long, const enum sock_proto);
-extern bool print_sockaddr_by_inode_cached(const unsigned long);
+extern const char *get_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
+extern bool print_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
extern void print_dirfd(struct tcb *, int);
extern int
extern void
print_sigset_addr_len(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
+extern void
+print_sigset_addr(struct tcb *, kernel_ulong_t addr);
extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
#define tprintsigmask_addr(prefix, mask) \
enum iov_decode, kernel_ulong_t data_size);
extern void
-decode_netlink(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
+decode_netlink(struct tcb *, int fd, kernel_ulong_t addr, kernel_ulong_t len);
extern void tprint_open_modes(unsigned int);
extern const char *sprint_open_modes(unsigned int);
DECL_IOCTL(dm);
DECL_IOCTL(file);
DECL_IOCTL(fs_x);
-DECL_IOCTL(loop);
+DECL_IOCTL(nsfs);
DECL_IOCTL(ptp);
DECL_IOCTL(scsi);
-DECL_IOCTL(sock);
DECL_IOCTL(term);
DECL_IOCTL(ubi);
DECL_IOCTL(uffdio);
#undef DECL_IOCTL
+extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
+
extern int tv_nz(const struct timeval *);
extern int tv_cmp(const struct timeval *, const struct timeval *);
extern double tv_float(const struct timeval *);
extern void printrusage32(struct tcb *, kernel_ulong_t);
extern const char *sprint_timeval32(struct tcb *tcp, kernel_ulong_t);
extern void print_timeval32(struct tcb *tcp, kernel_ulong_t);
-extern void print_timeval32_pair(struct tcb *tcp, kernel_ulong_t);
+extern void print_timeval32_utimes(struct tcb *tcp, kernel_ulong_t);
extern void print_itimerval32(struct tcb *tcp, kernel_ulong_t);
#endif
extern void tabto(void);
extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
extern void tprints(const char *str);
+extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
+extern void tprints_comment(const char *str);
#if SUPPORTED_PERSONALITIES > 1
extern void set_personality(int personality);
# endif
#endif
+#define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG \
+ (SIZEOF_KERNEL_LONG_T > 4 \
+ && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize)))
+
#define DECL_PRINTNUM(name) \
extern bool \
printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
printnum_addr_int((tcp), (addr))
#endif
+#ifndef current_klongsize
+extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
+# define printnum_kptr(tcp, addr) \
+ printnum_addr_klong_int((tcp), (addr))
+#elif current_klongsize > 4
+# define printnum_kptr(tcp, addr) \
+ printnum_addr_int64((tcp), (addr))
+#else /* current_klongsize == 4 */
+# define printnum_kptr(tcp, addr) \
+ printnum_addr_int((tcp), (addr))
+#endif
+
#define DECL_PRINTPAIR(name) \
extern bool \
printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
DECL_PRINTPAIR(int64);
#undef DECL_PRINTPAIR
-/* In many, many places we play fast and loose and use
- * tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc.
- * We probably need to use widen_to_long() instead:
- */
-#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
-# define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v))
-#else
-# define widen_to_long(v) ((long)(v))
-#endif
+static inline kernel_long_t
+truncate_klong_to_current_wordsize(const kernel_long_t v)
+{
+#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
+ if (current_wordsize < sizeof(v)) {
+ return (int) v;
+ } else
+#endif
+ {
+ return v;
+ }
+}
-#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
-# define widen_to_ulong(v) \
- (current_wordsize == 4 ? (unsigned long) (uint32_t) (v) : \
- (unsigned long) (v))
-#else
-# define widen_to_ulong(v) ((unsigned long)(v))
-#endif
+static inline kernel_ulong_t
+truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
+{
+#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
+ if (current_wordsize < sizeof(v)) {
+ return (unsigned int) v;
+ } else
+#endif
+ {
+ return v;
+ }
+}
/*
* Cast a pointer or a pointer-sized integer to kernel_ulong_t.
extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
-extern struct fault_opts *fault_vec[SUPPORTED_PERSONALITIES];
+extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
#ifdef IN_MPERS_BOOTSTRAP
/* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
projects / strace / blobdiff