1b8db068ed
Add a LoadCompilationPrefixMap() helper in SymbolFile::FindPlugin that
walks up from the symbol file's directory looking for a
compilation-prefix-map.json file. When found, each key→value entry is
applied to the module's source path mapping list, allowing LLDB to
resolve source file paths that were rewritten by -fdebug-prefix-map at
build time without requiring manual `settings set target.source-map`.
The JSON file format maps fake paths (as written into debug info) back
to their real on-disk counterparts:
{ "/fake/srcdir": "/real/srcdir" }
Directory results are cached so the filesystem is walked at most once
per unique directory across all modules loaded in a session.
Also apply the module's source path remappings in
SymbolFileDWARFDebugMap::ParseCompileUnitAtIndex when constructing
compile units from N_SO stabs. This mirrors what MakeAbsoluteAndRemap
does for the dSYM case so that fake paths baked into the debug map are
transparently resolved to real paths.
rdar://84824567
Assisted-By: Claude
44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
# TestCompilationPrefixMap.py
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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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Test that LLDB auto-loads compilation-prefix-map.json to resolve remapped
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source paths without requiring manual `settings set target.source-map`.
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"""
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import os
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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import lldbsuite.test.lldbutil as lldbutil
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class TestCompilationPrefixMap(TestBase):
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@skipIfWindows
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def test_compilation_prefix_map(self):
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"""
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Build a binary with -fdebug-prefix-map remapping the source directory
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to /fake/srcdir, place compilation-prefix-map.json next to the binary
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mapping /fake/srcdir back to the real source directory, and verify that
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LLDB resolves a source-line breakpoint without any manual source-map
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configuration.
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"""
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self.build()
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src_dir = self.getSourceDir()
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log = self.getBuildArtifact("symbol.log")
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self.runCmd('log enable lldb symbol -f "%s"' % log)
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source_spec = lldb.SBFileSpec(os.path.join(src_dir, "main.c"))
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lldbutil.run_to_source_breakpoint(self, "return x", source_spec)
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self.filecheck_log(log, __file__)
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# CHECK: found compilation-prefix-map.json
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# CHECK: applying prefix map: '/fake/srcdir'
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