624 lines
13 KiB
C++
624 lines
13 KiB
C++
#include <stdio.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include <windows.h>
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#include <signal.h>
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#include "sys/strace.h"
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/* GCC runtime library's C++ EH code unfortunately pulls in stdio, and we
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get undefine references to __impure_ptr, and hence the following
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hack. It should be reasonably safe however as long as this file
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is built using -mno-cygwin as is intended. */
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int _impure_ptr;
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/* we *know* we're being built with GCC */
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#define alloca __builtin_alloca
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static const char *pgm;
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static int forkdebug = 0;
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static int numerror = 1;
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static int usecs = 1;
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static int delta = 1;
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static int hhmmss = 0;
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static BOOL close_handle (HANDLE h, DWORD ok);
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#define CloseHandle(h) close_handle(h, 0)
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struct child_list
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{
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DWORD id;
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HANDLE hproc;
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int saw_stars;
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char nfields;
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long long start_time;
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DWORD last_usecs;
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struct child_list *next;
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child_list () : id (0), hproc (NULL), saw_stars (0), nfields (0),
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start_time (0), last_usecs (0), next (NULL) {}
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};
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child_list children;
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static void
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warn (int geterrno, const char *fmt, ...)
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{
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va_list args;
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char buf[4096];
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va_start (args, fmt);
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sprintf (buf, "%s: ", pgm);
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vsprintf (strchr (buf, '\0'), fmt, args);
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if (geterrno)
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perror (buf);
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else
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{
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fputs (buf, stderr);
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fputs ("\n", stderr);
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}
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}
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static void __attribute__ ((noreturn))
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error (int geterrno, const char *fmt, ...)
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{
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va_list args;
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char buf[4096];
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va_start (args, fmt);
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sprintf (buf, "%s: ", pgm);
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vsprintf (strchr (buf, '\0'), fmt, args);
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if (geterrno)
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perror (buf);
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else
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{
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fputs (buf, stderr);
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fputs ("\n", stderr);
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}
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ExitProcess (1);
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}
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DWORD lastid = 0;
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HANDLE lasth;
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#define PROCFLAGS \
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PROCESS_ALL_ACCESS /*(PROCESS_DUP_HANDLE | PROCESS_TERMINATE | PROCESS_VM_READ | PROCESS_VM_WRITE)*/
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static void
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add_child (DWORD id, HANDLE hproc)
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{
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child_list *c = children.next;
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children.next = new (child_list);
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children.next->next = c;
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lastid = children.next->id = id;
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HANDLE me = GetCurrentProcess ();
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if (!DuplicateHandle (me, hproc, me, &children.next->hproc, PROCFLAGS,
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FALSE, DUPLICATE_CLOSE_SOURCE))
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error (0, "couldn't duplicate %p,%p", me, hproc);
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lasth = children.next->hproc;
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}
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static child_list *
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get_child (DWORD id)
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{
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child_list *c;
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for (c = &children; (c = c->next) != NULL; )
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if (c->id == id)
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return c;
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error (0, "no process id %d found", id);
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}
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static void
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remove_child (DWORD id)
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{
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child_list *c;
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if (id == lastid)
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lastid = 0;
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for (c = &children; c->next != NULL; c = c->next)
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if (c->next->id == id)
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{
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child_list *c1 = c->next;
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close_handle (c1->hproc, id);
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c->next = c1->next;
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delete c1;
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return;
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}
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error (0, "no process id %d found", id);
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}
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#define LINE_BUF_CHUNK 128
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class linebuf
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{
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size_t alloc;
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public:
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size_t ix;
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char *buf;
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linebuf ()
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{
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ix = 0;
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alloc = 0;
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buf = NULL;
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}
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~linebuf () {if (buf) free (buf);}
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void add (const char *what, int len);
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void add (const char *what) {add (what, strlen (what));}
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void prepend (const char *what, int len);
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};
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void
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linebuf::add (const char *what, int len)
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{
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size_t newix;
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if ((newix = ix + len) >= alloc)
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{
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alloc += LINE_BUF_CHUNK + len;
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buf = (char *) realloc (buf, alloc + 1);
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}
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memcpy (buf + ix, what, len);
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ix = newix;
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buf[ix] = '\0';
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}
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void
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linebuf::prepend (const char *what, int len)
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{
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int buflen;
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size_t newix;
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if ((newix = ix + len) >= alloc)
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{
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alloc += LINE_BUF_CHUNK + len;
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buf = (char *) realloc (buf, alloc + 1);
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buf[ix] = '\0';
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}
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if ((buflen = strlen (buf)))
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memmove (buf + len, buf, buflen + 1);
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else
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buf[newix] = '\0';
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memcpy (buf, what, len);
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ix = newix;
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}
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static void
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make_command_line (linebuf& one_line, char **argv)
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{
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for (; *argv; argv++)
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{
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char *p = NULL;
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const char *a = *argv;
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int len = strlen (a);
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if (len != 0 && !(p = strpbrk (a, " \t\n\r\"")))
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one_line.add (a, len);
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else
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{
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one_line.add ("\"", 1);
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for (; p; a = p, p = strchr (p, '"'))
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{
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one_line.add (a, ++p - a);
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if (p[-1] == '"')
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one_line.add ("\"", 1);
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}
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if (*a)
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one_line.add (a);
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one_line.add ("\"", 1);
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}
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one_line.add (" ", 1);
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}
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if (one_line.ix)
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one_line.buf[one_line.ix - 1] = '\0';
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else
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one_line.add ("", 1);
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}
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static DWORD child_pid;
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static BOOL WINAPI
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ctrl_c (DWORD)
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{
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static int tic = 1;
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if ((tic ^= 1) && !GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0))
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error (0, "couldn't send CTRL-C to child, win32 error %d\n",
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GetLastError ());
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return TRUE;
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}
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static void
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create_child (char **argv)
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{
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linebuf one_line;
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STARTUPINFO si;
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PROCESS_INFORMATION pi;
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BOOL ret;
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DWORD flags;
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if (!*argv)
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error (0, "no program argument specified");
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memset (&si, 0, sizeof (si));
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si.cb = sizeof (si);
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/* cygwin32_conv_to_win32_path (exec_file, real_path);*/
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flags = forkdebug ? 0 : DEBUG_ONLY_THIS_PROCESS;
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flags |= /*CREATE_NEW_PROCESS_GROUP | */CREATE_DEFAULT_ERROR_MODE | DEBUG_PROCESS;
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make_command_line (one_line, argv);
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SetConsoleCtrlHandler (NULL, 0);
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ret = CreateProcess (0,
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one_line.buf,/* command line */
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NULL, /* Security */
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NULL, /* thread */
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TRUE, /* inherit handles */
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flags, /* start flags */
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NULL,
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NULL, /* current directory */
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&si,
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&pi);
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if (!ret)
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error (0, "error creating process %s, (error %d)", *argv, GetLastError());
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CloseHandle (pi.hThread);
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CloseHandle (pi.hProcess);
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child_pid = pi.dwProcessId;
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SetConsoleCtrlHandler (ctrl_c, 1);
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}
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static int
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output_winerror (FILE *ofile, char *s)
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{
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char *winerr = strstr (s, "Win32 error ");
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if (!winerr)
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return 0;
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DWORD errnum = atoi (winerr + sizeof ("Win32 error ") - 1);
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if (!errnum)
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return 0;
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/*
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* NOTE: Currently there is no policy for how long the
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* the buffers are, and looks like 256 is a smallest one
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* (dlfcn.cc). Other than error 1395 (length 213) and
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* error 1015 (length 249), the rest are all under 188
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* characters, and so I'll use 189 as the buffer length.
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* For those longer error messages, FormatMessage will
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* return FALSE, and we'll get the old behaviour such as
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* ``Win32 error 1395'' etc.
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*/
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char buf[4096];
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if (!FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
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| FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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errnum,
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MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPTSTR) buf,
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sizeof (buf),
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NULL))
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return 0;
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/* Get rid the trailing CR/NL pair. */
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char *p = strchr (buf, '\0');
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p[-2] = '\n';
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p[-1] = '\0';
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*winerr = '\0';
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fputs (s, ofile);
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fputs (buf, ofile);
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return 1;
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}
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static SYSTEMTIME *
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syst (long long t)
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{
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FILETIME n;
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static SYSTEMTIME st;
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long long now = t + ((long long) usecs * 10);
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n.dwHighDateTime = now >> 32;
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n.dwLowDateTime = now & 0xffffffff;
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FileTimeToSystemTime (&n, &st);
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return &st;
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}
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static void __stdcall
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handle_output_debug_string (DWORD id, LPVOID p, unsigned mask, FILE *ofile)
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{
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int len;
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int special;
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char alen[3 + 8 + 1];
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DWORD nbytes;
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child_list *child = get_child (id);
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HANDLE hchild = child->hproc;
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#define INTROLEN (sizeof (alen) - 1)
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if (id == lastid && hchild != lasth)
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warn (0, "%p != %p", hchild, lasth);
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alen[INTROLEN] = '\0';
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if (!ReadProcessMemory (hchild, p, alen, INTROLEN, &nbytes))
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#ifndef DEBUGGING
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return;
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#else
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error (0, "couldn't get message length from subprocess %d<%p>, windows error %d",
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id, hchild, GetLastError ());
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#endif
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if (strncmp (alen, "cYg", 3))
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return;
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len = (int) strtoul (alen + 3, NULL, 16);
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if (!len)
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return;
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if (len > 0)
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special = 0;
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else
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{
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special = len;
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if (special == _STRACE_INTERFACE_ACTIVATE_ADDR)
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len = 17;
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}
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char *buf;
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buf = (char *) alloca (len + 65) + 10;
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if (!ReadProcessMemory (hchild, ((char *) p) + INTROLEN, buf, len, &nbytes))
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error (0, "couldn't get message from subprocess, windows error %d",
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GetLastError ());
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buf[len] = '\0';
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char *s = strtok (buf, " ");
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unsigned n = strtoul (s, NULL, 16);
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s = strchr (s, '\0') + 1;
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if (special == _STRACE_INTERFACE_ACTIVATE_ADDR)
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{
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DWORD new_flag = 1;
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if (!WriteProcessMemory (hchild, (LPVOID) n, &new_flag,
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sizeof (new_flag), &nbytes))
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error (0, "couldn't write strace flag to subprocess, windows error %d",
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GetLastError ());
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return;
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}
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char *origs = s;
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if (mask & n)
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/* got it */;
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else if (!(mask & _STRACE_ALL) || (n & _STRACE_NOTALL))
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return; /* This should not be included in "all" output */
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DWORD dusecs, usecs;
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char *ptusec, *ptrest;
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dusecs = strtoul (s, &ptusec, 10);
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char *q = ptusec;
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while (*q == ' ')
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q++;
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if (*q != '[')
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{
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usecs = strtoul (q, &ptrest, 10);
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while (*ptrest == ' ')
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ptrest++;
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}
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else
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{
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ptrest = q;
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ptusec = s;
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usecs = dusecs;
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}
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if (child->saw_stars == 0)
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{
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FILETIME st;
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char *news;
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GetSystemTimeAsFileTime (&st);
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FileTimeToLocalFileTime (&st, &st);
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child->start_time = st.dwHighDateTime;
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child->start_time <<= 32;
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child->start_time |= st.dwLowDateTime;
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if (*(news = ptrest) != '[')
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child->saw_stars = 2;
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else
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{
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child->saw_stars++;
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while ((news = strchr (news, ' ')) != NULL && *++news != '*')
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child->nfields++;
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if (news == NULL)
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child->saw_stars++;
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else
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{
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s = news;
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child->nfields++;
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}
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}
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}
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else if (child->saw_stars < 2)
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{
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int i;
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char *news;
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if (*(news = ptrest) != '[')
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child->saw_stars = 2;
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else
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{
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for (i = 0; i < child->nfields; i++)
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if ((news = strchr (news, ' ')) == NULL)
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break; // Should never happen
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else
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news++;
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if (news == NULL)
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child->saw_stars = 2;
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else
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{
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s = news;
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if (*s == '*')
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{
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SYSTEMTIME *st = syst (child->start_time);
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fprintf (ofile, "Date/Time: %d-%02d-%02d %02d:%02d:%02d\n",
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st->wYear, st->wMonth, st->wDay, st->wHour, st->wMinute, st->wSecond);
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child->saw_stars++;
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}
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}
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}
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}
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long long d = usecs - child->last_usecs;
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char intbuf[40];
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if (child->saw_stars < 2 || s != origs)
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/* Nothing */;
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else if (hhmmss)
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{
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s = ptrest - 9;
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SYSTEMTIME *st = syst (child->start_time + (long long) usecs * 10);
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sprintf (s, "%02d:%02d:%02d", st->wHour, st->wMinute, st->wSecond);
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*strchr (s, '\0') = ' ';
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}
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else if (!delta)
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s = ptusec;
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else
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{
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s = ptusec;
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sprintf (intbuf, "%5d ", (int) d);
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int len = strlen (intbuf);
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memcpy ((s -= len), intbuf, len);
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}
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child->last_usecs = usecs;
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if (numerror || !output_winerror (ofile, s))
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fputs (s, ofile);
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fflush (ofile);
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}
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static void
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proc_child (unsigned mask, FILE *ofile)
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{
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DEBUG_EVENT ev;
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int processes = 0;
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SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_HIGHEST);
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while (1)
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{
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BOOL debug_event = WaitForDebugEvent (&ev, 1000);
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if (!debug_event)
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continue;
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switch (ev.dwDebugEventCode)
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{
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case CREATE_PROCESS_DEBUG_EVENT:
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if (ev.u.CreateProcessInfo.hFile)
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CloseHandle (ev.u.CreateProcessInfo.hFile);
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if (ev.u.CreateProcessInfo.hThread)
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CloseHandle (ev.u.CreateProcessInfo.hThread);
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add_child (ev.dwProcessId, ev.u.CreateProcessInfo.hProcess);
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processes++;
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break;
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case CREATE_THREAD_DEBUG_EVENT:
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if (ev.u.CreateThread.hThread)
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CloseHandle (ev.u.CreateThread.hThread);
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break;
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case LOAD_DLL_DEBUG_EVENT:
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if (ev.u.LoadDll.hFile)
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CloseHandle (ev.u.LoadDll.hFile);
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break;
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case OUTPUT_DEBUG_STRING_EVENT:
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handle_output_debug_string (ev.dwProcessId,
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ev.u.DebugString.lpDebugStringData,
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mask, ofile);
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break;
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case EXIT_PROCESS_DEBUG_EVENT:
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remove_child (ev.dwProcessId);
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break;
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}
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if (!ContinueDebugEvent (ev.dwProcessId, ev.dwThreadId,
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DBG_CONTINUE))
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error (0, "couldn't continue debug event, windows error %d",
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GetLastError ());
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if (ev.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT && --processes == 0)
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break;
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}
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}
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static void
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dostrace (unsigned mask, FILE *ofile, char **argv)
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{
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create_child (argv);
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proc_child (mask, ofile);
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return;
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}
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int
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main(int argc, char **argv)
|
|
{
|
|
unsigned mask = 0;
|
|
FILE *ofile = NULL;
|
|
int opt;
|
|
|
|
if (!(pgm = strrchr (*argv, '\\')) && !(pgm = strrchr (*argv, '/')))
|
|
pgm = *argv;
|
|
else
|
|
pgm++;
|
|
|
|
while ((opt = getopt (argc, argv, "m:o:fndut")) != EOF)
|
|
switch (opt)
|
|
{
|
|
case 'f':
|
|
forkdebug ^= 1;
|
|
break;
|
|
case 'm':
|
|
mask = strtoul (optarg, NULL, 16);
|
|
break;
|
|
case 'o':
|
|
if ((ofile = fopen (optarg, "w")) == NULL)
|
|
error (1, "can't open %s", optarg);
|
|
#ifdef F_SETFD
|
|
(void) fcntl (fileno (ofile), F_SETFD, 0);
|
|
#endif
|
|
break;
|
|
case 'n':
|
|
numerror ^= 1;
|
|
break;
|
|
case 't':
|
|
hhmmss ^= 1;
|
|
break;
|
|
case 'd':
|
|
delta ^= 1;
|
|
break;
|
|
case 'u':
|
|
usecs ^= 1;
|
|
}
|
|
|
|
if (!mask)
|
|
mask = 1;
|
|
|
|
if (!ofile)
|
|
ofile = stdout;
|
|
|
|
dostrace (mask, ofile, argv + optind);
|
|
}
|
|
|
|
#undef CloseHandle
|
|
|
|
static BOOL
|
|
close_handle (HANDLE h, DWORD ok)
|
|
{
|
|
child_list *c;
|
|
for (c = &children; (c = c->next) != NULL; )
|
|
if (c->hproc == h && c->id != ok)
|
|
error (0, "Closing child handle %p", h);
|
|
return CloseHandle (h);
|
|
}
|