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