python
diff --git a/‎Modules/_testexternalinspection.c
Copy file name to clipboardExpand all lines: Modules/_testexternalinspection.c
+41-4Lines changed: 41 additions & 4 deletions b/‎Modules/_testexternalinspection.c
Copy file name to clipboardExpand all lines: Modules/_testexternalinspection.c
+41-4Lines changed: 41 additions & 4 deletions
@@ -36,6 +36,8 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <execinfo.h>
+
 
 #ifndef Py_BUILD_CORE_BUILTIN
 #    define Py_BUILD_CORE_MODULE 1
@@ -152,7 +154,7 @@ pid_to_task(pid_t pid)
 
     result = task_for_pid(mach_task_self(), pid, &task);
     if (result != KERN_SUCCESS) {
-        printf("Call to task_for_pid failed on PID %d: %s", pid, mach_error_string(result));
+        printf("Call to task_for_pid failed on PID %d: %s\n", pid, mach_error_string(result));
         PyErr_SetString(PyExc_PermissionError, "Cannot get task for PID");
         return 0;
     }
@@ -272,14 +274,14 @@ void*
 get_py_runtime(pid_t pid)
 {
     char elf_file[256];
-    unsigned long start_address = find_python_map_start_address(pid, elf_file);
+    void* start_address = (void*)find_python_map_start_address(pid, elf_file);
 
     if (start_address == 0) {
         PyErr_SetString(PyExc_RuntimeError, "No memory map associated with python or libpython found");
         return NULL;
     }
 
-    unsigned long result = 0;
+    void* result = NULL;
 
     int fd = open(elf_file, O_RDONLY);
     if (fd < 0) {
@@ -315,7 +317,7 @@ get_py_runtime(pid_t pid)
     }
 
     if (py_runtime_section != NULL) {
-        result = start_address + (unsigned long)py_runtime_section->sh_addr;
+        result = start_address + py_runtime_section->sh_addr;
     }
 
     close(fd);
@@ -324,6 +326,39 @@ get_py_runtime(pid_t pid)
 }
 
 #endif
+static void full_write(int fd, const char *buf, size_t len)
+{
+        while (len > 0) {
+                ssize_t ret = write(fd, buf, len);
+
+                if ((ret == -1) && (errno != EINTR))
+                        break;
+
+                buf += (size_t) ret;
+                len -= (size_t) ret;
+        }
+}
+void print_backtrace(void)
+{
+        static const char start[] = "BACKTRACE ------------\n";
+        static const char end[] = "----------------------\n";
+
+        void *bt[1024];
+        int bt_size;
+        char **bt_syms;
+        int i;
+
+        bt_size = backtrace(bt, 1024);
+        bt_syms = backtrace_symbols(bt, bt_size);
+        full_write(STDERR_FILENO, start, strlen(start));
+        for (i = 1; i < bt_size; i++) {
+                size_t len = strlen(bt_syms[i]);
+                full_write(STDERR_FILENO, bt_syms[i], len);
+                full_write(STDERR_FILENO, "\n", 1);
+        }
+        full_write(STDERR_FILENO, end, strlen(end));
+    free(bt_syms);
+}
 
 ssize_t
 read_memory(pid_t pid, void* remote_address, ssize_t size, void* local_address)
@@ -337,7 +372,9 @@ read_memory(pid_t pid, void* remote_address, ssize_t size, void* local_address)
 
         bytes_read = process_vm_readv(pid, &local_iov, 1, &remote_iov, 1, 0);
         if (bytes_read == -1) {
+
             PyErr_SetFromErrno(PyExc_OSError);
+            print_backtrace();
             return -1;
         }