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Greatly improve /proc/PID/stack by tracing the ebp frame chain.

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I also added a generator cache to FileHandle. This way, multiple
reads to a generated file (i.e in a synthfs) can transparently
handle multiple calls to read() without the contents changing
between calls.

The cache is discarded at EOF (or when the FileHandle is destroyed.)
This commit is contained in:
Andreas Kling 2018-10-27 00:14:24 +02:00
parent c928b06218
commit 2716a9e2d7
22 changed files with 210 additions and 116 deletions
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6
VirtualFileSystem/FileSystem.h
View file

@ -16,6 +16,8 @@
static const dword mepoch = 476763780;
class FileHandle;
class FileSystem : public Retainable<FileSystem> {
public:
static void initializeGlobals();
@ -30,7 +32,7 @@ public:
virtual bool writeInode(InodeIdentifier, const ByteBuffer&) = 0;
virtual InodeMetadata inodeMetadata(InodeIdentifier) const = 0;
virtual Unix::ssize_t readInodeBytes(InodeIdentifier, Unix::off_t offset, Unix::size_t count, byte* buffer) const = 0;
virtual Unix::ssize_t readInodeBytes(InodeIdentifier, Unix::off_t offset, Unix::size_t count, byte* buffer, FileHandle*) const = 0;
struct DirectoryEntry {
String name;
@ -44,7 +46,7 @@ public:
virtual InodeIdentifier makeDirectory(InodeIdentifier parentInode, const String& name, Unix::mode_t) = 0;
InodeIdentifier childOfDirectoryInodeWithName(InodeIdentifier, const String& name) const;
ByteBuffer readEntireInode(InodeIdentifier) const;
ByteBuffer readEntireInode(InodeIdentifier, FileHandle* = nullptr) const;
protected:
FileSystem();