vasilito
cb424d7448
verify-patch-sanity.py validates every active recipe .patch has internally- consistent hunk line counts — catching the 'malformed patch at line N' failure at commit/CI/preflight time instead of hours into a cook. This cycle hit that class three times (qtwaylandscanner, sddm, xwayland), each only discovered when cookbook tried to apply the patch. Running it across the repo found 29 latent malformed patches (validated against GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22'). They were harmless only because they sit in vendored recipes (baked, not re- applied) — but would fail on any version-bump re-derivation. --fix recounts the hunk headers (body untouched) and repaired all 29. Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test (test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats (empty placeholders, bare-@@ git hunks).
84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
//===--- ScratchBuffer.cpp - Scratch space for forming tokens -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ScratchBuffer interface.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Lex/ScratchBuffer.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <cstring>
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using namespace clang;
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// ScratchBufSize - The size of each chunk of scratch memory. Slightly less
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//than a page, almost certainly enough for anything. :)
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static const unsigned ScratchBufSize = 4060;
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ScratchBuffer::ScratchBuffer(SourceManager &SM)
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: SourceMgr(SM), CurBuffer(nullptr) {
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// Set BytesUsed so that the first call to getToken will require an alloc.
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BytesUsed = ScratchBufSize;
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}
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/// getToken - Splat the specified text into a temporary MemoryBuffer and
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/// return a SourceLocation that refers to the token. This is just like the
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/// method below, but returns a location that indicates the physloc of the
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/// token.
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SourceLocation ScratchBuffer::getToken(const char *Buf, unsigned Len,
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const char *&DestPtr) {
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if (BytesUsed+Len+2 > ScratchBufSize)
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AllocScratchBuffer(Len+2);
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else {
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// Clear out the source line cache if it's already been computed.
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// FIXME: Allow this to be incrementally extended.
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SourceMgr.getSLocEntry(SourceMgr.getFileID(BufferStartLoc))
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.getFile()
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.getContentCache()
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.SourceLineCache = SrcMgr::LineOffsetMapping();
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}
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// Prefix the token with a \n, so that it looks like it is the first thing on
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// its own virtual line in caret diagnostics.
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CurBuffer[BytesUsed++] = '\n';
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// Return a pointer to the character data.
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DestPtr = CurBuffer+BytesUsed;
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// Copy the token data into the buffer.
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memcpy(CurBuffer+BytesUsed, Buf, Len);
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// Remember that we used these bytes.
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BytesUsed += Len+1;
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// Add a NUL terminator to the token. This keeps the tokens separated, in
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// case they get relexed, and puts them on their own virtual lines in case a
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// diagnostic points to one.
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CurBuffer[BytesUsed-1] = '\0';
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return BufferStartLoc.getLocWithOffset(BytesUsed-Len-1);
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}
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void ScratchBuffer::AllocScratchBuffer(unsigned RequestLen) {
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// Only pay attention to the requested length if it is larger than our default
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// page size. If it is, we allocate an entire chunk for it. This is to
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// support gigantic tokens, which almost certainly won't happen. :)
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if (RequestLen < ScratchBufSize)
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RequestLen = ScratchBufSize;
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// Get scratch buffer. Zero-initialize it so it can be dumped into a PCH file
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// deterministically.
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std::unique_ptr<llvm::WritableMemoryBuffer> OwnBuf =
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llvm::WritableMemoryBuffer::getNewMemBuffer(RequestLen,
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"<scratch space>");
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CurBuffer = OwnBuf->getBufferStart();
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FileID FID = SourceMgr.createFileID(std::move(OwnBuf));
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BufferStartLoc = SourceMgr.getLocForStartOfFile(FID);
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BytesUsed = 0;
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}
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