添加信号处理

src/backtrace.c

@@ -0,0 +1,38 @@
+#include "backtrace.h"
+
+#include "buffer.h"
+#include "config.h"
+
+#ifdef HAS_EXECINFO
+#include <execinfo.h>
+#endif
+
+#define MAX_STACK_SIZE 32
+
+
+/**
+ * Get a backtrace.
+ * @param buffer The buffer to fill with backtrace.
+ */
+void backtrace_get(buffer_t *buffer) {
+  buffer_init(buffer);
+
+#ifdef HAS_EXECINFO
+  void *stack[MAX_STACK_SIZE];
+  char **bt;
+  int stack_size;
+
+  stack_size = backtrace(stack, countof(stack));
+  bt = backtrace_symbols(stack, stack_size);
+
+  if (bt) {
+    for (int i = 0; i < stack_size; i++) {
+      if (i > 0) buffer_addsl(buffer, "\n");
+      buffer_adds(buffer, bt[i]);
+    }
+    p_delete(&bt);
+  } else
+#endif
+
+    buffer_addsl(buffer, "Cannot get backtrace symbols.");
+}