1 files changed, 112 insertions, 0 deletions
diff --git a/debug.c b/debug.c
new file mode 100644
index 0000000..1be873b
--- /dev/null
+++ b/debug.c
@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "common.h"
+
+void
+debug_(int level, const char *file, int line, const char *fmt, ...) {
+	char buf[1024];
+	va_list args;
+
+	if (!(options.debug & level)) {
+		return;
+	}
+	va_start(args, fmt);
+	vsnprintf(buf, 1024, fmt, args);
+	va_end(args);
+
+	output_line(NULL, "DEBUG: %s:%d: %s", file, line, buf);
+}
+
+/*
+ * The following section provides a way to print things, like hex dumps,
+ * with out using buffered output.  This was written by Steve Munroe of IBM.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/ptrace.h>
+
+static int
+xwritehexl(long i) {
+	int rc = 0;
+	char text[17];
+	int j;
+	unsigned long temp = (unsigned long)i;
+
+	for (j = 15; j >= 0; j--) {
+		char c;
+		c = (char)((temp & 0x0f) + '0');
+		if (c > '9') {
+			c = (char)(c + ('a' - '9' - 1));
+		}
+		text[j] = c;
+		temp = temp >> 4;
+	}
+
+	rc = write(1, text, 16);
+	return rc;
+}
+
+static int
+xwritec(char c) {
+	char temp = c;
+	char *text = &temp;
+	int rc = 0;
+	rc = write(1, text, 1);
+	return rc;
+}
+
+static int
+xwritecr(void) {
+	return xwritec('\n');
+}
+
+static int
+xwritedump(void *ptr, long addr, int len) {
+	int rc = 0;
+	long *tprt = (long *)ptr;
+	int i;
+
+	for (i = 0; i < len; i += 8) {
+		xwritehexl(addr);
+		xwritec('-');
+		xwritec('>');
+		xwritehexl(*tprt++);
+		xwritecr();
+		addr += sizeof(long);
+	}
+
+	return rc;
+}
+
+int
+xinfdump(long pid, void *ptr, int len) {
+	int rc;
+	int i;
+	long wrdcnt;
+	long *infwords;
+	long addr;
+
+	wrdcnt = len / sizeof(long) + 1;
+	infwords = malloc(wrdcnt * sizeof(long));
+	if (!infwords) {
+		perror("ltrace: malloc");
+		exit(1);
+	}
+	addr = (long)ptr;
+
+	addr = ((addr + sizeof(long) - 1) / sizeof(long)) * sizeof(long);
+
+	for (i = 0; i < wrdcnt; ++i) {
+		infwords[i] = ptrace(PTRACE_PEEKTEXT, pid, addr);
+		addr += sizeof(long);
+	}
+
+	rc = xwritedump(infwords, (long)ptr, len);
+
+	free(infwords);
+	return rc;
+}