#include "git-compat-util.h"
#include "cache.h"
-static FILE *error_handle;
-static int tweaked_error_buffering;
-
void vreportf(const char *prefix, const char *err, va_list params)
{
- FILE *fh = error_handle ? error_handle : stderr;
+ char msg[4096];
+ char *p, *pend = msg + sizeof(msg);
+ size_t prefix_len = strlen(prefix);
- fflush(fh);
- if (!tweaked_error_buffering) {
- setvbuf(fh, NULL, _IOLBF, 0);
- tweaked_error_buffering = 1;
+ if (sizeof(msg) <= prefix_len) {
+ fprintf(stderr, "BUG!!! too long a prefix '%s'\n", prefix);
+ abort();
+ }
+ memcpy(msg, prefix, prefix_len);
+ p = msg + prefix_len;
+ if (vsnprintf(p, pend - p, err, params) < 0)
+ *p = '\0'; /* vsnprintf() failed, clip at prefix */
+
+ for (; p != pend - 1 && *p; p++) {
+ if (iscntrl(*p) && *p != '\t' && *p != '\n')
+ *p = '?';
}
- fputs(prefix, fh);
- vfprintf(fh, err, params);
- fputc('\n', fh);
+ *(p++) = '\n'; /* we no longer need a NUL */
+ fflush(stderr);
+ write_in_full(2, msg, p - msg);
}
static NORETURN void usage_builtin(const char *err, va_list params)
{
vreportf("usage: ", err, params);
+
+ /*
+ * When we detect a usage error *before* the command dispatch in
+ * cmd_main(), we don't know what verb to report. Force it to this
+ * to facilitate post-processing.
+ */
+ trace2_cmd_name("_usage_");
+
+ /*
+ * Currently, the (err, params) are usually just the static usage
+ * string which isn't very useful here. Usually, the call site
+ * manually calls fprintf(stderr,...) with the actual detailed
+ * syntax error before calling usage().
+ *
+ * TODO It would be nice to update the call sites to pass both
+ * the static usage string and the detailed error message.
+ */
+
exit(129);
}
static NORETURN void die_builtin(const char *err, va_list params)
{
+ /*
+ * We call this trace2 function first and expect it to va_copy 'params'
+ * before using it (because an 'ap' can only be walked once).
+ */
+ trace2_cmd_error_va(err, params);
+
vreportf("fatal: ", err, params);
+
exit(128);
}
static void error_builtin(const char *err, va_list params)
{
+ /*
+ * We call this trace2 function first and expect it to va_copy 'params'
+ * before using it (because an 'ap' can only be walked once).
+ */
+ trace2_cmd_error_va(err, params);
+
vreportf("error: ", err, params);
}
static void warn_builtin(const char *warn, va_list params)
{
+ /*
+ * We call this trace2 function first and expect it to va_copy 'params'
+ * before using it (because an 'ap' can only be walked once).
+ */
+ trace2_cmd_error_va(warn, params);
+
vreportf("warning: ", warn, 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
* (ugh), so keep things static. */
-static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
-static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
-static void (*error_routine)(const char *err, va_list params) = error_builtin;
-static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
+static NORETURN_PTR report_fn usage_routine = usage_builtin;
+static NORETURN_PTR report_fn die_routine = die_builtin;
+static report_fn error_routine = error_builtin;
+static report_fn warn_routine = warn_builtin;
static int (*die_is_recursing)(void) = die_is_recursing_builtin;
-void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
+void set_die_routine(NORETURN_PTR report_fn routine)
{
die_routine = routine;
}
-void set_error_routine(void (*routine)(const char *err, va_list params))
+void set_error_routine(report_fn routine)
{
error_routine = routine;
}
-void set_die_is_recursing_routine(int (*routine)(void))
+report_fn get_error_routine(void)
{
- die_is_recursing = routine;
+ return error_routine;
+}
+
+void set_warn_routine(report_fn routine)
+{
+ warn_routine = routine;
}
-void set_error_handle(FILE *fh)
+report_fn get_warn_routine(void)
{
- error_handle = fh;
- tweaked_error_buffering = 0;
+ return warn_routine;
+}
+
+void set_die_is_recursing_routine(int (*routine)(void))
+{
+ die_is_recursing = routine;
}
void NORETURN usagef(const char *err, ...)
}
}
str_error[j] = 0;
+ /* Truncation is acceptable here */
snprintf(buf, n, "%s: %s", fmt, str_error);
return buf;
}
warn_routine(warn, params);
va_end(params);
}
+
+/* Only set this, ever, from t/helper/, when verifying that bugs are caught. */
+int BUG_exit_code;
+
+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);
+ if (BUG_exit_code)
+ exit(BUG_exit_code);
+ 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
+
+#ifdef SUPPRESS_ANNOTATED_LEAKS
+void unleak_memory(const void *ptr, size_t len)
+{
+ static struct suppressed_leak_root {
+ struct suppressed_leak_root *next;
+ char data[FLEX_ARRAY];
+ } *suppressed_leaks;
+ struct suppressed_leak_root *root;
+
+ FLEX_ALLOC_MEM(root, data, ptr, len);
+ root->next = suppressed_leaks;
+ suppressed_leaks = root;
+}
+#endif
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