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e31c3713bf
- Avoid TLS initialization checks by using inline initialization. - Avoid global offset table indirection by reducing -fPIC to -fPIE. out/ReleaseXARM64/exe.stripped/dart_precompiled_runtime 11137992 -> 11274776 (-1.21%) We still need -fPIC in some places because we build a few shared libraries for FFI, so copy some of Fuchsia's GN setup to use -fPIE or -fPIC as appropriate. Account for older gcc that does not default to -fpie. TEST=ci Bug: https://github.com/dart-lang/sdk/issues/51602 Change-Id: I85072153cb1aef9047c1adbf36c7496fbeb11e10 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/286221 Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
29 lines
934 B
Dart
29 lines
934 B
Dart
// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "dart:io";
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// Mmmm... pie!
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main() {
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if (!Platform.isLinux) return; // readelf is a Linux tool.
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// Modern Mac and Android binaries are always PIE.
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// Fuchsia binaries are always PIE.
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var result = Process.runSync("readelf", ["-h", Platform.resolvedExecutable]);
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print("stdout:");
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print(result.stdout);
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print("stderr:");
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print(result.stderr);
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if (result.exitCode != 0) {
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throw "readelf failed";
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}
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// A position-dependent executable outputs "EXEC (Executable file)".
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if (!result.stdout.contains("DYN (Position-Independent Executable file)") &&
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!result.stdout.contains("DYN (Shared object file)")) {
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throw "Standalone VM should be a position-independent executable";
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}
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}
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