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Provide a maintainer-only debug method

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Generating debug logs to stdout or stderr makes it impossible to
run tests etc. so create a dumb DBG facility to log to a temp file.
This exists only in maintainer mode and the DBG macro gives a
compile error if it's used in non-maintainer mode.

* src/makeint.h (DBG): Call dbg() in maintainer mode, else error.
(dbg): Define it in maintainer mode.
* src/misc.c (dbg): Open a log file for append, write, then close.
This commit is contained in:
Paul Smith 2022-10-23 18:36:44 -04:00
parent b4157d2ff4
commit c46b5a9e0e
2 changed files with 20 additions and 0 deletions
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4
src/makeint.h
View File

@ -658,8 +658,12 @@ int unload_file (const char *name);
#ifdef MAKE_MAINTAINER_MODE
# define SPIN(_s) spin (_s)
void spin (const char* suffix);
# define DBG(_f) dbg _f
void dbg (const char *fmt, ...);
#else
# define SPIN(_s)
/* Never put this code into Git or a release. */
# define DBG(_f) compile-error
#endif
/* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,

16
src/misc.c
View File

@ -530,6 +530,22 @@ spin (const char* type)
}
}
void
dbg (const char *fmt, ...)
{
FILE *fp = fopen ("/tmp/gmkdebug.log", "a+");
va_list args;
char buf[4096];
va_start (args, fmt);
vsprintf (buf, fmt, args);
va_end (args);
fprintf(fp, "%u: %s\n", (unsigned) make_pid (), buf);
fflush (fp);
fclose (fp);
}
#endif