From 5fc775e2efd1adf4985d9abcb1d970dcaa944555 Mon Sep 17 00:00:00 2001
From: Yichao Zhou <broken.zhou@gmail.com>
Date: Thu, 13 Apr 2017 22:06:19 +0200
Subject: log.h: LOG_CALLSTACK

---
 src/nvim/log.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/nvim/log.h b/src/nvim/log.h
index 221f0bbaf6..48be7606e7 100644
--- a/src/nvim/log.h
+++ b/src/nvim/log.h
@@ -61,6 +61,30 @@
                            __VA_ARGS__)
 #endif
 
+#if defined(__linux__)
+# include <execinfo.h>
+# define LOG_CALLSTACK(prefix) \
+  do { \
+    void *trace[100]; \
+    int trace_size = backtrace(trace, 100); \
+    \
+    char exe[1024]; \
+    ssize_t elen = readlink("/proc/self/exe", exe, sizeof(exe) - 1); \
+    exe[elen] = 0; \
+    \
+    for (int i = 1; i < trace_size; i++) { \
+      char buf[256]; \
+      snprintf(buf, sizeof(buf), "addr2line -e %s -f -p %p", exe, trace[i]); \
+      FILE *fp = popen(buf, "r"); \
+      while (fgets(buf, sizeof(buf) - 1, fp) != NULL) { \
+        buf[strlen(buf)-1] = 0; \
+        do_log(DEBUG_LOG_LEVEL, __func__, __LINE__, true, prefix "%s", buf); \
+      } \
+      fclose(fp); \
+    } \
+  } while (0)
+#endif
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "log.h.generated.h"
 #endif
-- 
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