# endif
#endif
-/* configuration section */
+/* Configuration section */
#ifndef MAX_QUALS
#if defined(LINUX) && defined(MIPS)
#define MAX_QUALS 7000 /* maximum number of syscalls, signals, etc. */
#endif
#endif
#ifndef DEFAULT_STRLEN
-#define DEFAULT_STRLEN 32 /* default maximum # of bytes printed in
- `printstr', change with `-s' switch */
+/* default maximum # of bytes printed in `printstr', change with -s switch */
+#define DEFAULT_STRLEN 32
#endif
#ifndef DEFAULT_ACOLUMN
#define DEFAULT_ACOLUMN 40 /* default alignment column for results */
#endif
+
+/* Maximum number of args to a syscall.
+ *
+ * Make sure that all entries in all syscallent.h files
+ * have nargs <= MAX_ARGS!
+ * linux/<ARCH>/syscallent.h: all have nargs <= 6.
+ * freebsd/i386/syscallent.h: one syscall with nargs = 8
+ * (sys_sendfile, looks legitimate)
+ * and one with nargs = 7 (sys_mmap, maybe it should have 6?).
+ * sunos4/syscallent.h: all are <= 6.
+ * svr4/syscallent.h: all are MA (MAX_ARGS), it's unclear what the real max is.
+ */
#ifndef MAX_ARGS
-# ifdef HPPA
-# define MAX_ARGS 6 /* maximum number of args to a syscall */
+# if defined LINUX
+# define MAX_ARGS 6
+# elif defined HPPA
+# define MAX_ARGS 6
+# elif defined X86_64 || defined I386
+# ifdef FREEBSD
+# define MAX_ARGS 8
+# else
+# define MAX_ARGS 6
+# endif
# else
-# define MAX_ARGS 32 /* maximum number of args to a syscall */
+/* Way too big. Switch your arch to saner size after you tested that it works */
+# define MAX_ARGS 32
# endif
#endif
+
#ifndef DEFAULT_SORTBY
#define DEFAULT_SORTBY "time" /* default sorting method for call profiling */
#endif
#endif
#ifdef USE_PROCFS
-#include <sys/procfs.h>
-#ifdef HAVE_MP_PROCFS
-#include <sys/uio.h>
-#endif
-#ifdef FREEBSD
-#include <sys/pioctl.h>
-#endif /* FREEBSD */
+# include <sys/procfs.h>
+# ifdef HAVE_MP_PROCFS
+# include <sys/uio.h>
+# endif
+# ifdef FREEBSD
+# include <sys/pioctl.h>
+# endif
#else /* !USE_PROCFS */
-#if (defined(LINUXSPARC) || defined(LINUX_X86_64) || defined(LINUX_ARM) || defined(LINUX_AVR32)) && defined(__GLIBC__)
-#include <sys/ptrace.h>
-#else
+# if (defined(LINUXSPARC) || defined(LINUX_X86_64) || defined(LINUX_ARM) || defined(LINUX_AVR32)) && defined(__GLIBC__)
+# include <sys/ptrace.h>
+# else
/* Work around awkward prototype in ptrace.h. */
-#define ptrace xptrace
-#include <sys/ptrace.h>
-#undef ptrace
-#ifdef POWERPC
-#define __KERNEL__
-#include <asm/ptrace.h>
-#undef __KERNEL__
-#endif
-#ifdef LINUX
+# define ptrace xptrace
+# include <sys/ptrace.h>
+# undef ptrace
+# ifdef POWERPC
+# define __KERNEL__
+#
include <asm/ptrace.h>
+# undef __KERNEL__
+# endif
+# ifdef LINUX
extern long ptrace(int, int, char *, long);
-#else /* !LINUX */
+# else
extern int ptrace(int, int, char *, int, ...);
-#endif /* !LINUX */
-#endif /* !LINUXSPARC */
-#endif /* !SVR4 */
+# endif
+# endif
+#endif /* !USE_PROCFS */
#ifdef LINUX
#if !defined(__GLIBC__)
#define PTRACE_PEEKUSER PTRACE_PEEKUSR
#define PTRACE_POKEUSER PTRACE_POKEUSR
#endif
+#if defined(X86_64) || defined(I386)
+/* For struct pt_regs. x86 strace uses PTRACE_GETREGS.
+ * PTRACE_GETREGS returns registers in the layout of this struct.
+ */
+# include <asm/ptrace.h>
+#endif
#ifdef ALPHA
# define REG_R0 0
# define REG_A0 16
#ifdef SVR4
#ifdef HAVE_MP_PROCFS
-extern int mp_ioctl (int f, int c, void *a, int s);
-#define IOCTL(f,c,a) mp_ioctl (f, c, a, sizeof *a)
+extern int mp_ioctl(int f, int c, void *a, int s);
+#define IOCTL(f,c,a) mp_ioctl(f, c, a, sizeof *a)
#define IOCTL_STATUS(t) \
- pread (t->pfd_stat, &t->status, sizeof t->status, 0)
-#define IOCTL_WSTOP(t) \
- (IOCTL (t->pfd, PCWSTOP, (char *)NULL) < 0 ? -1 : \
- IOCTL_STATUS (t))
+ pread(t->pfd_stat, &t->status, sizeof t->status, 0)
+#define IOCTL_WSTOP(t) \
+ (IOCTL(t->pfd, PCWSTOP, (char *)NULL) < 0 ? -1 : IOCTL_STATUS(t))
#define PR_WHY pr_lwp.pr_why
#define PR_WHAT pr_lwp.pr_what
#define PR_REG pr_lwp.pr_context.uc_mcontext.gregs
#define PIOCRUN PCRUN
#else
#define IOCTL ioctl
-#define IOCTL_STATUS(t) ioctl (t->pfd, PIOCSTATUS, &t->status)
-#define IOCTL_WSTOP(t) ioctl (t->pfd, PIOCWSTOP, &t->status)
+#define IOCTL_STATUS(t) ioctl(t->pfd, PIOCSTATUS, &t->status)
+#define IOCTL_WSTOP(t) ioctl(t->pfd, PIOCWSTOP, &t->status)
#define PR_WHY pr_why
#define PR_WHAT pr_what
#define PR_REG pr_reg
#endif
#ifdef FREEBSD
#define IOCTL ioctl
-#define IOCTL_STATUS(t) ioctl (t->pfd, PIOCSTATUS, &t->status)
-#define IOCTL_WSTOP(t) ioctl (t->pfd, PIOCWAIT, &t->status)
+#define IOCTL_STATUS(t) ioctl(t->pfd, PIOCSTATUS, &t->status)
+#define IOCTL_WSTOP(t) ioctl(t->pfd, PIOCWAIT, &t->status)
#define PIOCRUN PIOCCONT
#define PIOCWSTOP PIOCWAIT
#define PR_WHY why
#endif
#ifdef LINUX
-# ifndef PTRACE_SETOPTIONS
+# if !HAVE_DECL_PTRACE_SETOPTIONS
# define PTRACE_SETOPTIONS 0x4200
# endif
-# ifndef PTRACE_O_TRACEFORK
+# if !HAVE_DECL_PTRACE_GETEVENTMSG
+# define PTRACE_GETEVENTMSG 0x4201
+# endif
+# if !HAVE_DECL_PTRACE_GETSIGINFO
+# define PTRACE_GETSIGINFO 0x4202
+# endif
+
+# if !HAVE_DECL_PTRACE_O_TRACESYSGOOD
+# define PTRACE_O_TRACESYSGOOD 0x00000001
+# endif
+# if !HAVE_DECL_PTRACE_O_TRACEFORK
# define PTRACE_O_TRACEFORK 0x00000002
# endif
-# ifndef PTRACE_O_TRACEVFORK
+# if !HAVE_DECL_PTRACE_O_TRACEVFORK
# define PTRACE_O_TRACEVFORK 0x00000004
# endif
-# ifndef PTRACE_O_TRACECLONE
+# if !HAVE_DECL_PTRACE_O_TRACECLONE
# define PTRACE_O_TRACECLONE 0x00000008
# endif
+# if !HAVE_DECL_PTRACE_O_TRACEEXEC
+# define PTRACE_O_TRACEEXEC 0x00000010
+# endif
+# if !HAVE_DECL_PTRACE_O_TRACEEXIT
+# define PTRACE_O_TRACEEXIT 0x00000040
+# endif
-# ifndef PTRACE_EVENT_FORK
+# if !HAVE_DECL_PTRACE_EVENT_FORK
# define PTRACE_EVENT_FORK 1
# endif
-# ifndef PTRACE_EVENT_VFORK
+# if !HAVE_DECL_PTRACE_EVENT_VFORK
# define PTRACE_EVENT_VFORK 2
# endif
-# ifndef PTRACE_EVENT_CLONE
+# if !HAVE_DECL_PTRACE_EVENT_CLONE
# define PTRACE_EVENT_CLONE 3
# endif
+# if !HAVE_DECL_PTRACE_EVENT_EXEC
+# define PTRACE_EVENT_EXEC 4
+# endif
+# if !HAVE_DECL_PTRACE_EVENT_VFORK_DONE
+# define PTRACE_EVENT_VFORK_DONE 5
+# endif
+# if !HAVE_DECL_PTRACE_EVENT_EXIT
+# define PTRACE_EVENT_EXIT 6
+# endif
#endif /* LINUX */
+#if !defined __GNUC__
+# define __attribute__(x) /*nothing*/
+#endif
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
/* Trace Control Block */
struct tcb {
- short flags; /* See below for TCB_ values */
+ int flags; /* See below for TCB_ values */
int pid; /* Process Id of this entry */
+ int u_nargs; /* System call argument count */
+ int u_error; /* Error code */
long scno; /* System call number */
- int u_nargs; /* System call arguments */
long u_arg[MAX_ARGS]; /* System call arguments */
#if defined (LINUX_MIPSN32)
long long ext_arg[MAX_ARGS]; /* System call arguments */
#endif
- int u_error; /* Error code */
long u_rval; /* (first) return value */
#ifdef HAVE_LONG_LONG
long long u_lrval; /* long long return value */
#endif
- FILE *outf; /* Output file for this process */
+ int ptrace_errno;
int curcol; /* Output column for this process */
+ FILE *outf; /* Output file for this process */
const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
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 */
/* Support for tracing forked processes */
- struct tcb *parent; /* Parent of this process */
- int nchildren; /* # of traced children */
- int waitpid; /* pid(s) this process is waiting for */
- int nzombies; /* # of formerly traced children now dead */
-#ifdef LINUX
- int nclone_threads; /* # of nchildren with CLONE_THREAD */
- int nclone_waiting; /* clone threads in wait4 (TCB_SUSPENDED) */
-#endif
- /* (1st arg of wait4()) */
long baddr; /* `Breakpoint' address */
long inst[2]; /* Instructions on above */
+#ifdef USE_PROCFS
int pfd; /* proc file descriptor */
+#endif
#ifdef SVR4
-#ifdef HAVE_MP_PROCFS
+# ifdef HAVE_MP_PROCFS
int pfd_stat;
int pfd_as;
pstatus_t status;
-#else
+# else
prstatus_t status; /* procfs status structure */
+# endif
#endif
-#endif
- int ptrace_errno;
#ifdef FREEBSD
struct procfs_status status;
int pfd_reg;
/* TCB flags */
#define TCB_STARTUP 00001 /* We have just begun ptracing this process */
#define TCB_INUSE 00002 /* This table entry is in use */
-#define TCB_INSYSCALL 00004 /* A system call is in progress */
+/*
+ * Are we in system call entry or in syscall exit?
+ *
+ * This bit is set after all syscall entry processing is done.
+ * Therefore, this bit will be set when next ptrace stop occurs,
+ * which should be syscall exit stop. Other stops which are possible
+ * directly after syscall entry (death, ptrace event stop)
+ * are simpler and handled without calling trace_syscall(), therefore
+ * the places where TCB_INSYSCALL can be set but we aren't in syscall stop
+ * are limited to trace(), this condition is never observed in trace_syscall()
+ * and below.
+ * The bit is cleared after all syscall exit processing is done.
+ * User-generated SIGTRAPs and post-execve SIGTRAP make it necessary
+ * to be very careful and NOT set TCB_INSYSCALL bit when they are encountered.
+ * TCB_WAITEXECVE bit is used for this purpose (see below).
+ *
+ * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable.
+ */
+#define TCB_INSYSCALL 00004
#define TCB_ATTACHED 00010 /* Process is not our own child */
-#define TCB_EXITING 00020 /* As far as we know, this process is exiting */
-#define TCB_SUSPENDED 00040 /* Process can not be allowed to resume just now */
+#ifdef LINUX
+#define TCB_ATTACH_DONE 00020 /* PTRACE_ATTACH was done on this tcb->pid */
+#endif
#define TCB_BPTSET 00100 /* "Breakpoint" set after fork(2) */
#define TCB_SIGTRAPPED 00200 /* Process wanted to block SIGTRAP */
-#define TCB_FOLLOWFORK 00400 /* Process should have forks followed */
#define TCB_REPRINT 01000 /* We should reprint this syscall on exit */
+#define TCB_FILTERED 02000 /* This system call has been filtered out */
#ifdef LINUX
/* x86 does not need TCB_WAITEXECVE.
- * It can detect execve's SIGTRAP by looking at eax/rax.
- * See "stray syscall exit: eax = " message in syscall_fixup().
+ * It can detect SIGTRAP by looking at eax/rax.
+ * See "not a syscall entry (eax = %ld)\n" message
+ * in syscall_fixup_on_sysenter().
*/
# if defined(ALPHA) || defined(AVR32) || defined(SPARC) || defined(SPARC64) \
|| defined(POWERPC) || defined(IA64) || defined(HPPA) \
|| defined(SH) || defined(SH64) || defined(S390) || defined(S390X) \
|| defined(ARM) || defined(MIPS) || defined(BFIN) || defined(TILE)
-# define TCB_WAITEXECVE 02000 /* ignore SIGTRAP after exceve */
+/* This tracee has entered into execve syscall. Expect post-execve SIGTRAP
+ * to happen. (When it is detected, tracee is continued and this bit is cleared.)
+ */
+# define TCB_WAITEXECVE 04000
# endif
-# define TCB_CLONE_THREAD 010000 /* CLONE_THREAD set in creating syscall */
-# define TCB_GROUP_EXITING 020000 /* TCB_EXITING was exit_group, not _exit */
# include <sys/syscall.h>
# ifndef __NR_exit_group
# /* Hack: Most headers around are too old to have __NR_exit_group. */
#define syserror(tcp) ((tcp)->u_error != 0)
#define verbose(tcp) (qual_flags[(tcp)->scno] & QUAL_VERBOSE)
#define abbrev(tcp) (qual_flags[(tcp)->scno] & QUAL_ABBREV)
+#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
struct xlat {
int val;
#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 SYSCALL_NEVER_FAILS 0100 /* Syscall is always successful. */
typedef enum {
CFLAG_NONE = 0,
CFLAG_BOTH
} cflag_t;
-extern struct tcb **tcbtab;
extern int *qual_flags;
extern int debug, followfork;
extern unsigned int ptrace_setoptions;
extern int dtime, xflag, qflag;
extern cflag_t cflag;
-extern int acolumn;
-extern unsigned int nprocs, tcbtabsize;
extern int max_strlen;
extern struct tcb *tcp_last;
enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
-extern int set_personality(int personality);
+void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
+void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
+void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
+void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
+void die_out_of_memory(void) __attribute__ ((noreturn));
+
+extern void set_personality(int personality);
extern const char *xlookup(const struct xlat *, int);
extern struct tcb *alloc_tcb(int, int);
extern struct tcb *pid2tcb(int);
extern void droptcb(struct tcb *);
-extern void expand_tcbtab(void);
#define alloctcb(pid) alloc_tcb((pid), 1)
extern void set_sortby(const char *);
extern void set_overhead(int);
extern void qualify(const char *);
+#ifdef USE_PROCFS
extern int get_scno(struct tcb *);
+#endif
extern long known_scno(struct tcb *);
extern long do_ptrace(int request, struct tcb *tcp, void *addr, void *data);
extern int ptrace_restart(int request, struct tcb *tcp, int sig);
-extern int force_result(struct tcb *, int, long);
extern int trace_syscall(struct tcb *);
-extern int count_syscall(struct tcb *, struct timeval *);
+extern void count_syscall(struct tcb *, struct timeval *);
extern void printxval(const struct xlat *, int, const char *);
extern int printargs(struct tcb *);
-extern int addflags(const struct xlat *, int);
+extern void addflags(const struct xlat *, int);
extern int printflags(const struct xlat *, int, const char *);
extern const char *sprintflags(const char *, const struct xlat *, int);
extern int umoven(struct tcb *, long, int, char *);
extern void printpath(struct tcb *, long);
extern void printpathn(struct tcb *, long, int);
extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
-extern void sprinttv(struct tcb *, long, enum bitness_t, char *);
+extern char *sprinttv(struct tcb *, long, enum bitness_t, char *);
extern void print_timespec(struct tcb *, long);
extern void sprint_timespec(char *, struct tcb *, long);
#ifdef HAVE_SIGINFO_T
extern void printsiginfo(siginfo_t *, int);
#endif
+extern const char *getfdpath(struct tcb *, int);
+extern void printfd(struct tcb *, int);
extern void printsock(struct tcb *, long, int);
extern void print_sock_optmgmt(struct tcb *, long, int);
extern void printrusage(struct tcb *, long);
+#ifdef ALPHA
+extern void printrusage32(struct tcb *, long);
+#endif
extern void printuid(const char *, unsigned long);
extern int clearbpt(struct tcb *);
+/*
+ * On Linux, "setbpt" is a misnomer: we don't set a breakpoint
+ * (IOW: no poking in user's text segment),
+ * instead we change fork/vfork/clone into clone(CLONE_PTRACE).
+ * On newer kernels, we use PTRACE_O_TRACECLONE/TRACE[V]FORK instead.
+ */
extern int setbpt(struct tcb *);
-extern int sigishandled(struct tcb *, int);
extern void printcall(struct tcb *);
extern const char *signame(int);
extern void print_sigset(struct tcb *, long, int);
extern void printsignal(int);
extern void printleader(struct tcb *);
extern void printtrailer(void);
-extern void tabto(int);
+extern void tabto(void);
extern void call_summary(FILE *);
-extern void tprint_iov(struct tcb *, unsigned long, unsigned long);
+extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov);
extern void tprint_open_modes(mode_t);
extern const char *sprint_open_modes(mode_t);
extern int is_restart_error(struct tcb *);
+extern int pathtrace_select(const char *);
+extern int pathtrace_match(struct tcb *);
+
extern int change_syscall(struct tcb *, int);
extern int internal_fork(struct tcb *);
extern int internal_exec(struct tcb *);
-extern int internal_wait(struct tcb *, int);
-extern int internal_exit(struct tcb *);
extern const struct ioctlent *ioctl_lookup(long);
extern const struct ioctlent *ioctl_next_match(const struct ioctlent *);
#ifdef LINUX
extern int rtc_ioctl(struct tcb *, long, long);
extern int scsi_ioctl(struct tcb *, long, long);
+extern int block_ioctl(struct tcb *, long, long);
#endif
extern int tv_nz(struct timeval *);
extern void tv_mul(struct timeval *, struct timeval *, int);
extern void tv_div(struct timeval *, struct timeval *, int);
+/* Some libc have stpcpy, some don't. Sigh...
+ * Roll our private implementation...
+ */
+#undef stpcpy
+#define stpcpy strace_stpcpy
+extern char *stpcpy(char *dst, const char *src);
+
#ifdef SUNOS4
extern int fixvfork(struct tcb *);
#endif
-#if !(defined(LINUX) && !defined(SPARC) && !defined(SPARC64) && !defined(IA64))
+#if !(defined(LINUX) && !defined(SPARC) && !defined(SPARC64) && !defined(IA64) \
+ && !defined(SH))
extern long getrval2(struct tcb *);
#endif
#ifdef USE_PROCFS
#define printtv_special(tcp, addr) \
printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
-#ifdef __GNUC__
-extern void tprintf(const char *fmt, ...)
- __attribute__ ((format (printf, 1, 2)));
-#else
-extern void tprintf(const char *fmt, ...);
-#endif
+extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
+extern void tprints(const char *str);
#ifndef HAVE_STRERROR
const char *strerror(int);
extern const int personality_wordsize[];
struct sysent {
- int nargs;
+ unsigned nargs;
int sys_flags;
int (*sys_func)();
const char *sys_name;
long native_scno; /* Match against SYS_* constants. */
};
-extern const struct sysent *sysent;
-extern int nsyscalls;
-
-extern const char *const *errnoent;
-extern int nerrnos;
-
struct ioctlent {
const char *doth;
const char *symbol;
unsigned long code;
};
+extern const struct sysent *sysent;
+extern unsigned nsyscalls;
+extern const char *const *errnoent;
+extern unsigned nerrnos;
extern const struct ioctlent *ioctlent;
-extern int nioctlents;
-
+extern unsigned nioctlents;
extern const char *const *signalent;
-extern int nsignals;
-
-extern const struct ioctlent ioctlent0[];
-extern const int nioctlents0;
-extern const char *const signalent0[];
-extern const int nsignals0;
-
-#if SUPPORTED_PERSONALITIES >= 2
-extern const struct ioctlent ioctlent1[];
-extern const int nioctlents1;
-extern const char *const signalent1[];
-extern const int nsignals1;
-#endif /* SUPPORTED_PERSONALITIES >= 2 */
-
-#if SUPPORTED_PERSONALITIES >= 3
-extern const struct ioctlent ioctlent2[];
-extern const int nioctlents2;
-extern const char *const signalent2[];
-extern const int nsignals2;
-#endif /* SUPPORTED_PERSONALITIES >= 3 */
+extern unsigned nsignals;
+
+#define SCNO_IN_RANGE(scno) ((unsigned long)(scno) < nsyscalls)
#if HAVE_LONG_LONG
#endif
extern int not_failing_only;
+extern int show_fd_path;
+extern int tracing_paths;
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