Added backtrace.h for holding backtrace-related functions (#2515)

1 files changed, 46 insertions, 0 deletions

diff --git a/src/os/backtrace.c b/src/os/backtrace.c
new file mode 100644
index 00000000..f0345cd6
--- /dev/null
+++ b/src/os/backtrace.c
@@ -0,0 +1,46 @@
+#include "backtrace.h"
+
+#if !defined(ANDROID) && !defined(_WIN32)
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <execinfo.h>
+
+#include "debug.h"
+#include "box64context.h"
+
+#define BT_BUF_SIZE 100
+void ShowNativeBT(int log_minimum)
+{
+    // grab current name
+    // and temporarily rename binary to original box64
+    // to get exact backtrace
+    size_t boxpath_lenth = strlen(my_context->box64path) + 1;
+    char current_name[boxpath_lenth];
+    memcpy(current_name, my_context->orig_argv[0], boxpath_lenth);
+    memcpy(my_context->orig_argv[0], my_context->box64path, boxpath_lenth);
+    // show native bt
+    int nptrs;
+    void* buffer[BT_BUF_SIZE];
+    char** strings;
+
+    nptrs = backtrace(buffer, BT_BUF_SIZE);
+    strings = backtrace_symbols(buffer, nptrs);
+    if (strings) {
+        for (int j = 0; j < nptrs; j++)
+            printf_log(log_minimum, "NativeBT: %s\n", strings[j]);
+        free(strings);
+    } else
+        printf_log(log_minimum, "NativeBT: none (%d/%s)\n", errno, strerror(errno));
+    // restore modified name
+    memcpy(my_context->box64path, my_context->orig_argv[0], boxpath_lenth);
+}
+#undef BT_BUF_SIZE
+
+#else
+void ShowNativeBT(int log_minimum) { }
+#endif
\ No newline at end of file