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Side by Side Diff: base/android/java/src/org/chromium/base/library_loader/Linker.java

Issue 2406083002: Crazylinker: remove the code to load component build library (Closed)
Patch Set: change comment Created 4 years, 1 month ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 package org.chromium.base.library_loader; 5 package org.chromium.base.library_loader;
6 6
7 import android.os.Build; 7 import android.os.Build;
8 import android.os.Bundle; 8 import android.os.Bundle;
9 import android.os.Parcel; 9 import android.os.Parcel;
10 import android.os.ParcelFileDescriptor; 10 import android.os.ParcelFileDescriptor;
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496 if (mMemoryDeviceConfig == MEMORY_DEVICE_CONFIG_LOW) { 496 if (mMemoryDeviceConfig == MEMORY_DEVICE_CONFIG_LOW) {
497 Log.i(TAG, "Simulating a low-memory device"); 497 Log.i(TAG, "Simulating a low-memory device");
498 } else { 498 } else {
499 Log.i(TAG, "Simulating a regular-memory device"); 499 Log.i(TAG, "Simulating a regular-memory device");
500 } 500 }
501 } 501 }
502 } 502 }
503 } 503 }
504 504
505 /** 505 /**
506 * Determine whether a library is the linker library. Also deal with the 506 * Determine whether a library is the linker library.
507 * component build that adds a .cr suffix to the name.
508 * 507 *
509 * @param library the name of the library. 508 * @param library the name of the library.
510 * @return true is the library is the Linker's own JNI library. 509 * @return true is the library is the Linker's own JNI library.
511 */ 510 */
512 public boolean isChromiumLinkerLibrary(String library) { 511 public boolean isChromiumLinkerLibrary(String library) {
513 return library.equals(LINKER_JNI_LIBRARY) || library.equals(LINKER_JNI_L IBRARY + ".cr"); 512 return library.equals(LINKER_JNI_LIBRARY);
514 } 513 }
515 514
516 /** 515 /**
517 * Load the Linker JNI library. Throws UnsatisfiedLinkError on error. 516 * Load the Linker JNI library. Throws UnsatisfiedLinkError on error.
518 * In a component build, the suffix ".cr" is added to each library name, so
519 * if the initial load fails we retry with a suffix.
520 */ 517 */
521 protected static void loadLinkerJniLibrary() { 518 protected static void loadLinkerJniLibrary() {
522 String libName = "lib" + LINKER_JNI_LIBRARY + ".so"; 519 String libName = "lib" + LINKER_JNI_LIBRARY + ".so";
523 if (DEBUG) { 520 if (DEBUG) {
524 Log.i(TAG, "Loading " + libName); 521 Log.i(TAG, "Loading " + libName);
525 } 522 }
526 try { 523 System.loadLibrary(LINKER_JNI_LIBRARY);
527 System.loadLibrary(LINKER_JNI_LIBRARY);
528 } catch (UnsatisfiedLinkError e) {
529 Log.w(TAG, "Couldn't load " + libName + ", trying " + libName + ".cr ");
530 System.loadLibrary(LINKER_JNI_LIBRARY + ".cr");
531 }
532 } 524 }
533 525
534 /** 526 /**
535 * Obtain a random base load address at which to place loaded libraries. 527 * Obtain a random base load address at which to place loaded libraries.
536 * 528 *
537 * @return new base load address 529 * @return new base load address
538 */ 530 */
539 protected long getRandomBaseLoadAddress() { 531 protected long getRandomBaseLoadAddress() {
540 // nativeGetRandomBaseLoadAddress() returns an address at which it has p reviously 532 // nativeGetRandomBaseLoadAddress() returns an address at which it has p reviously
541 // successfully mapped an area larger than the largest library we expect to load, 533 // successfully mapped an area larger than the largest library we expect to load,
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824 * Return a random address that should be free to be mapped with the given s ize. 816 * Return a random address that should be free to be mapped with the given s ize.
825 * Maps an area large enough for the largest library we might attempt to loa d, 817 * Maps an area large enough for the largest library we might attempt to loa d,
826 * and if successful then unmaps it and returns the address of the area allo cated 818 * and if successful then unmaps it and returns the address of the area allo cated
827 * by the system (with ASLR). The idea is that this area should remain free of 819 * by the system (with ASLR). The idea is that this area should remain free of
828 * other mappings until we map our library into it. 820 * other mappings until we map our library into it.
829 * 821 *
830 * @return address to pass to future mmap, or 0 on error. 822 * @return address to pass to future mmap, or 0 on error.
831 */ 823 */
832 private static native long nativeGetRandomBaseLoadAddress(); 824 private static native long nativeGetRandomBaseLoadAddress();
833 } 825 }
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