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Resolve compiler source paths through file descriptors

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udo
2026-07-17 22:51:46 +00:00
parent 914cf17f23
commit 37b03eb4d5
2 changed files with 28 additions and 1 deletions
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scripts/test_dependency_invalidation.sh
+10
View File
@@ -73,6 +73,16 @@ if [[ "$(http_marker)" != *"dependency-marker-a"* ]]; then
exit 1
fi
# Compiler source canonicalization must retain symlink-target identity while
# avoiding realpath's repeated per-segment probes on ordinary source graphs.
printf '%s\n' 'String symlink_dependency_marker() { return("symlink-marker-a"); }' >"$source_dir/symlink-target-a.uce"
printf '%s\n' 'String symlink_dependency_marker() { return("symlink-marker-b"); }' >"$source_dir/symlink-target-b.uce"
ln -s "symlink-target-a.uce" "$source_dir/symlink-child.uce"
printf '%s\n' '#load "symlink-child.uce"' 'CLI(Request& context) { print(symlink_dependency_marker()); }' >"$source_dir/symlink-parent.uce"
assert_marker symlink-parent symlink-marker-a
ln -sfn "symlink-target-b.uce" "$source_dir/symlink-child.uce"
assert_marker symlink-parent symlink-marker-b
# HTTP entry units can resolve route/components dynamically. A changed dynamic
# component must enter the demand-priority queue just like a changed entry unit;
# otherwise a common dependency rebuild can leave the requested page stale for
src/lib/compiler.cpp
+18 -1
View File
@@ -158,6 +158,23 @@ bool compiler_source_readable(String file_name, const struct stat& info, int* re
return(error == 0);
}
String compiler_source_path_real(String file_name)
{
int fd = open(file_name.c_str(), O_PATH | O_CLOEXEC);
if(fd < 0)
return(path_real(file_name));
String proc_path = "/proc/self/fd/" + std::to_string(fd);
char resolved[PATH_MAX];
ssize_t length = readlink(proc_path.c_str(), resolved, sizeof(resolved));
close(fd);
if(length <= 0 || length >= (ssize_t)sizeof(resolved))
return(path_real(file_name));
String result(resolved, (size_t)length);
if(str_ends_with(result, " (deleted)"))
return(path_real(file_name));
return(result);
}
UnitSourceSignatureEntry compiler_unit_source_entry(String file_name, bool allow_recent_stat)
{
auto checked_at = std::chrono::steady_clock::now();
@@ -204,7 +221,7 @@ void compiler_append_unit_source_signature(String file_name, std::set<String>& v
bool recent = allow_recent_stat && compiler_recent_unit_source_entry(normalized, entry);
if(!recent)
{
normalized = path_real(file_name);
normalized = compiler_source_path_real(file_name);
if(normalized == "")
normalized = file_name;
}