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#include <sys/queue.h>
/*
* The maximum nesting depth of parentheses/brackets. The current maximum
* depth is something like six, for UDS control messages. This constant can be
* increased as necessary without any problem.
*/
#define MAX_DEPTH 10
/*
* The maximum size of text that may be recorded, including null terminator.
* Increasing this allows longer lines to be recorded and replayed without
* being cut short (see call_replay), but also increases memory usage.
*/
#define RECORD_BUFSZ 256
struct trace_proc {
/* identity (public) */
pid_t pid;
/* data structure management (proc.c) */
TAILQ_ENTRY(trace_proc) next;
/* general process state (trace.c) */
char name[PROC_NAME_LEN];
unsigned int trace_flags;
reg_t last_pc;
reg_t last_sp;
/* call enter-to-leave state (call.c) */
int call_type;
vir_bytes m_addr;
message m_out;
const char *call_name;
unsigned int call_flags;
const struct call_handler *call_handler;
int call_result;
/* output state (output.c) */
int recording;
char outbuf[RECORD_BUFSZ];
size_t outlen;
/* formatting state (format.c) */
const char *next_sep;
int depth;
struct {
const char *sep;
int name;
} depths[MAX_DEPTH];
/* ioctl state (ioctl.c) */
int ioctl_index;
unsigned int ioctl_flags;
/* sysctl state (service/mib.c) */
uint32_t sctl_flags;
size_t sctl_size;
int (*sctl_proc)(struct trace_proc *, const char *, int, const void *,
vir_bytes, size_t);
int sctl_arg;
};
/* Trace flags. */
#define TF_INCALL 0x01 /* the process has entered a system call */
#define TF_SKIP 0x02 /* the system call result is to be skipped */
#define TF_CTX_SKIP 0x04 /* skip call result only if context changes */
#define TF_STOPPING 0x08 /* the process is expecting a SIGSTOP */
#define TF_ATTACH 0x10 /* we have not started this process */
#define TF_DETACH 0x20 /* detach from the process as soon as we can */
#define TF_EXEC 0x40 /* the process may be performing an execve() */
#define TF_NOCALL 0x80 /* no system call seen yet (for info only) */
/* Trace classes, determining how the tracer engine should handle a call. */
#define TC_NORMAL 0 /* normal call, no exceptions required */
#define TC_EXEC 1 /* exec call, success on subsequent SIGSTOP */
#define TC_SIGRET 2 /* sigreturn call, success on context change */
/* Call flags. */
#define CF_DONE 0x01 /* printing the call parameters is done */
#define CF_NORETURN 0x02 /* the call does not return on success */
#define CF_HIDE 0x04 /* do not print the current call */
#define CF_IPC_ERR 0x08 /* a failure occurred at the IPC level */
#define CF_REG_ERR 0x10 /* unable to retrieve the result register */
#define CF_MSG_ERR 0x20 /* unable to copy in the reply message */
/* Call types, determining how much has been printed up to the call split. */
#define CT_NOTDONE (0) /* not all parameters have been printed yet */
#define CT_DONE (CF_DONE) /* all parameters have been printed */
#define CT_NORETURN (CF_DONE | CF_NORETURN) /* the no-return call type */
/* Put flags. */
#define PF_FAILED 0x01 /* call failed, results may be invalid */
#define PF_LOCADDR 0x02 /* pointer is into local address space */
/* Yes, PF_LOCAL would conflict with the packet family definition. Bah. */
#define PF_ALT 0x04 /* alternative output (callee specific) */
#define PF_STRING PF_ALT /* buffer is string (put_buf only) */
#define PF_FULL 0x08 /* print full format (callee specific) */
#define PF_PATH (PF_STRING | PF_FULL) /* flags for path names */
#define PF_NONAME 0x10 /* default to no field names at this depth */
/* I/O control flags. */
#define IF_OUT 0x1 /* call to print outgoing (written) data */
#define IF_IN 0x2 /* call to print incoming (read) data */
#define IF_ALL 0x4 /* all fields printed (not really a bit) */
/* Sysctl processing types, determining what the callback function is to do. */
#define ST_NAME 0 /* print the rest of the name */
#define ST_OLDP 1 /* print the data pointed to by oldp */
#define ST_NEWP 2 /* print the data pointed to by newp */
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