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Update process_execute to acquire lock when checking if file exists

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Themis Demetriades
2024-11-12 16:12:24 +00:00
parent 3418425f20
commit b0400693ae
1 changed files with 5 additions and 6 deletions
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11
src/userprog/process.c
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@@ -85,12 +85,11 @@ process_execute (const char *cmd)
/* NOTE: Currently, the file being executed is closed in load () and then
reopened here. Because load is an exported public function, this
might be necessary. */
struct file *exec_file = filesys_open (file_name);
file_deny_write (exec_file);
/* Validates that the current file to be executed is a valid file */
if (filesys_open (file_name) == NULL)
return TID_ERROR;
lock_acquire (&filesys_lock);
/* Validates that the current file to be executed is a valid file */
if (filesys_open (file_name) == NULL)
return TID_ERROR;
lock_release (&filesys_lock);
/* Create a new thread to execute the command, by initializing
it running the function 'start_process' with the appropriate