fix mismatch of new[] and delete in Buffer

include/fxos/util/Buffer.h

@@ -46,7 +46,7 @@ struct Buffer
     /* Buffer size */
     size_t size;
     /* Data */
-    std::shared_ptr<char> data;
+    std::unique_ptr<char[]> data;
     /* File path, when constructed from file */
     std::string path;
 

include/fxos/vspace.h

@@ -40,7 +40,7 @@ struct Binding: public AbstractMemory
     /* Constructor from data buffer. An error is raised if the buffer is
        not at least of the size of the region. In this case, a new buffer
        can be constructed with the required size. */
-    Binding(MemoryRegion region, Buffer buffer);
+    Binding(MemoryRegion region, Buffer const &buffer);
 
     /* Targeted region, might overlap with other bindings */
     MemoryRegion region;

lib/util/Buffer.cpp

@@ -26,11 +26,8 @@ Buffer::Buffer():
 Buffer::Buffer(size_t bufsize, int fill)
 {
     this->size = bufsize;
-    // TODO: Buffer(size, fill) -> use std::make_unique<>
-    char *buffer = new char[size];
-    memset(buffer, fill, size);
-
-    this->data = std::shared_ptr<char>(buffer);
+    this->data = std::make_unique<char[]>(bufsize);
+    memset(this->data.get(), fill, bufsize);
     this->path = "(anonymous)";
 }
 
@@ -53,9 +50,8 @@ void Buffer::loadFromFile(std::string const &filepath, ssize_t bufsize,
     size_t size_to_read = std::min(size, (size_t)statbuf.st_size);
 
     /* Read buffer and fill whatever is left */
-    // TODO: use make_unique<>
-    this->data = std::shared_ptr<char>(new char[size]);
-    memset(this->data.get(), fill, size);
+    this->data = std::make_unique<char[]>(this->size);
+    memset(this->data.get(), fill, this->size);
     ssize_t x = read(fd, this->data.get(), size_to_read);
 
     close(fd);

lib/vspace.cpp

@@ -11,12 +11,9 @@
 
 namespace FxOS {
 
-Binding::Binding(MemoryRegion source_region, Buffer source_buffer):
-    region {source_region}, buffer {source_buffer}
+Binding::Binding(MemoryRegion source_region, Buffer const &source_buffer):
+    region {source_region}, buffer {source_buffer, region.size()}
 {
-    /* Extend the buffer if it's not at least as large as the region */
-    if(buffer.size < region.size())
-        buffer = Buffer(buffer, region.size());
 }
 
 char const *Binding::translate_dynamic(uint32_t addr, int *size)