diff options
Diffstat (limited to 'usage.c')
| -rw-r--r-- | usage.c | 60 |
1 files changed, 50 insertions, 10 deletions
@@ -6,12 +6,9 @@ #include "git-compat-util.h" #include "cache.h" -static FILE *error_handle; - void vreportf(const char *prefix, const char *err, va_list params) { char msg[4096]; - FILE *fh = error_handle ? error_handle : stderr; char *p; vsnprintf(msg, sizeof(msg), err, params); @@ -19,7 +16,7 @@ void vreportf(const char *prefix, const char *err, va_list params) if (iscntrl(*p) && *p != '\t' && *p != '\n') *p = '?'; } - fprintf(fh, "%s%s\n", prefix, msg); + fprintf(stderr, "%s%s\n", prefix, msg); } static NORETURN void usage_builtin(const char *err, va_list params) @@ -47,7 +44,23 @@ static void warn_builtin(const char *warn, va_list params) static int die_is_recursing_builtin(void) { static int dying; - return dying++; + /* + * Just an arbitrary number X where "a < x < b" where "a" is + * "maximum number of pthreads we'll ever plausibly spawn" and + * "b" is "something less than Inf", since the point is to + * prevent infinite recursion. + */ + static const int recursion_limit = 1024; + + dying++; + if (dying > recursion_limit) { + return 1; + } else if (dying == 2) { + warning("die() called many times. Recursion error or racy threaded death!"); + return 0; + } else { + return 0; + } } /* If we are in a dlopen()ed .so write to a global variable would segfault @@ -88,11 +101,6 @@ void set_die_is_recursing_routine(int (*routine)(void)) die_is_recursing = routine; } -void set_error_handle(FILE *fh) -{ - error_handle = fh; -} - void NORETURN usagef(const char *err, ...) { va_list params; @@ -201,3 +209,35 @@ void warning(const char *warn, ...) warn_routine(warn, params); va_end(params); } + +static NORETURN void BUG_vfl(const char *file, int line, const char *fmt, va_list params) +{ + char prefix[256]; + + /* truncation via snprintf is OK here */ + if (file) + snprintf(prefix, sizeof(prefix), "BUG: %s:%d: ", file, line); + else + snprintf(prefix, sizeof(prefix), "BUG: "); + + vreportf(prefix, fmt, params); + abort(); +} + +#ifdef HAVE_VARIADIC_MACROS +NORETURN void BUG_fl(const char *file, int line, const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + BUG_vfl(file, line, fmt, ap); + va_end(ap); +} +#else +NORETURN void BUG(const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + BUG_vfl(NULL, 0, fmt, ap); + va_end(ap); +} +#endif |