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7d43bceb7e
Try to invoke external debugger if internal debugger crashes. Try to handle early invocation of debugger more gracefully.
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*
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* File : external.c
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* Author : Kevin Holbrook
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* Created : July 18, 1999
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*
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* Convenience functions to handle use of external debugger.
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*
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "options.h"
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#define DBG_BUFF_SIZE 12
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#define DBG_EXTERNAL_DEFAULT "gdb"
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#define DBG_LOCATION_DEFAULT "/usr/local/bin/wine"
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#define DBG_SLEEPTIME_DEFAULT 120
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/* DEBUG_ExternalDebugger
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*
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* This function invokes an external debugger on the current
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* wine process. The form of the command executed is:
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* <debugger image> <wine image> <attach process id>
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*
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* The debugger command is normally invoked by a newly created xterm.
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*
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* The current calling process is temporarily put to sleep
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* so that the invoked debugger has time to come up and attach.
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*
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* The following environment variables may be used:
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*
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* Name Use Default
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* -------------------------------------------------------------------------------------
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* WINE_DBG_EXTERNAL debugger command to invoke ("gdb")
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* WINE_DBG_LOCATION fully qualified location of wine image ("/usr/local/bin/wine")
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* WINE_DBG_NO_XTERM if set do not invoke xterm with command (not set)
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* WINE_DBG_SLEEPTIME number of seconds to make process sleep (120)
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*
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*
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* Usage:
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*
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* #include "debugtools.h"
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*
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* DEBUG_ExternalDebugger();
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*
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*
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* Environment Example:
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*
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* export WINE_DBG_EXTERNAL="ddd"
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* export WINE_DBG_NO_XTERM=1
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* export WINE_DBG_SLEEPTIME=60
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*
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*/
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void DEBUG_ExternalDebugger(void)
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{
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pid_t attach_pid;
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pid_t child_pid;
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int dbg_sleep_secs = DBG_SLEEPTIME_DEFAULT;
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char *dbg_sleeptime;
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dbg_sleeptime = getenv("WINE_DBG_SLEEPTIME");
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/* convert sleep time string to integer seconds */
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if (dbg_sleeptime)
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{
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dbg_sleep_secs = atoi(dbg_sleeptime);
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/* check for conversion error */
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if (dbg_sleep_secs == 0)
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dbg_sleep_secs = DBG_SLEEPTIME_DEFAULT;
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}
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/* get the curent process id */
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attach_pid = getpid();
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/* create new process */
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child_pid = fork();
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/* check if we are the child process */
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if (child_pid == 0)
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{
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int status;
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const char *dbg_external;
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const char *dbg_wine_location;
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const char *dbg_no_xterm;
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char pid_string[DBG_BUFF_SIZE];
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/* check settings in environment for debugger to use */
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dbg_external = getenv("WINE_DBG_EXTERNAL");
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dbg_wine_location = getenv("WINE_DBG_LOCATION");
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dbg_no_xterm = getenv("WINE_DBG_NO_XTERM");
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/* if not set in environment, use default */
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if (!dbg_external)
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dbg_external = "gdb";
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/* if not set in environment, use default */
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if (!dbg_wine_location)
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dbg_wine_location = argv0;
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/* check for empty string in WINE_DBG_NO_XTERM */
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if (dbg_no_xterm && (strlen(dbg_no_xterm) < 1))
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dbg_no_xterm = NULL;
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/* clear the buffer */
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memset(pid_string, 0, DBG_BUFF_SIZE);
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/* make pid into string */
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sprintf(pid_string, "%ld", (long) attach_pid);
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/* now exec the debugger to get it's own clean memory space */
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if (dbg_no_xterm)
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status = execlp(dbg_external, dbg_external, dbg_wine_location, pid_string, NULL);
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else
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status = execlp("xterm", "xterm", "-e", dbg_external, dbg_wine_location, pid_string, NULL);
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if (status == -1)
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{
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if (dbg_no_xterm)
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fprintf(stderr, "DEBUG_ExternalDebugger failed to execute \"%s %s %s\", errno = %d\n",
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dbg_external, dbg_wine_location, pid_string, errno);
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else
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fprintf(stderr, "DEBUG_ExternalDebugger failed to execute \"xterm -e %s %s %s\", errno = %d\n",
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dbg_external, dbg_wine_location, pid_string, errno);
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}
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}
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else if (child_pid != -1)
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{
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/* make the parent/caller sleep so the child/debugger can catch it */
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sleep(dbg_sleep_secs);
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}
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else
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fprintf(stderr, "DEBUG_ExternalDebugger failed.\n");
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}
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