1 files changed, 108 insertions, 0 deletions
diff --git a/tools/gdbjithelper/gdbjithelper.c b/tools/gdbjithelper/gdbjithelper.c
new file mode 100644
index 0000000..817d5a4
--- /dev/null
+++ b/tools/gdbjithelper/gdbjithelper.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <malloc.h>
+#include <string.h>
+
+/* Currently debuggerd dumps 20 words each around PC and LR */
+#define NUM_DUMPED_WORDS 20
+
+volatile int done;
+
+/*
+ * See README.txt for detailed steps.
+ *
+ * If you see a native crash in the bugreport and the PC/LR are
+ * pointing to the code cache address range, copy them into the following
+ * arrays.
+ *
+ *        #00  pc 463ba204
+ *        #01  lr 463ba1c9  <unknown>
+ *
+ * code around pc:
+ * 463ba1e4 4300e119 4284aa7a f927f7b7 40112268
+ * 463ba1f4 419da7f8 00002000 01000100 00080000
+ * 463ba204 4191debc 01010000 4284aa74 68b00054
+ * 463ba214 045cf205 cc016468 0718f2a5 d0102800
+ * 463ba224 4c13c701 a20aa108 efb0f775 e008e010
+ *
+ * code around lr:
+ * 463ba1a8 42e19e58 f2050050 cc01045c 0718f2a5
+ * 463ba1b8 d00f2800 4c13c701 a20aa108 efe4f775
+ * 463ba1c8 e007e010 29006bf8 6e77dc01 a10347b8
+ * 463ba1d8 ef60f775 6db1480b 1c2d4788 4300e119
+ * 463ba1e8 4284aa7a f927f7b7 40112268 419da7f8
+ *
+ */
+
+int codePC[] = {
+    // Sample content
+    0x4300e119, 0x4284aa7a, 0xf927f7b7, 0x40112268,
+    0x419da7f8, 0x00002000, 0x01000100, 0x00080000,
+    0x4191debc, 0x01010000, 0x4284aa74, 0x68b00054,
+    0x045cf205, 0xcc016468, 0x0718f2a5, 0xd0102800,
+    0x4c13c701, 0xa20aa108, 0xefb0f775, 0xe008e010,
+};
+
+int codeLR[] = {
+    // Sample content
+    0x42e19e58, 0xf2050050, 0xcc01045c, 0x0718f2a5,
+    0xd00f2800, 0x4c13c701, 0xa20aa108, 0xefe4f775,
+    0xe007e010, 0x29006bf8, 0x6e77dc01, 0xa10347b8,
+    0xef60f775, 0x6db1480b, 0x1c2d4788, 0x4300e119,
+    0x4284aa7a, 0xf927f7b7, 0x40112268, 0x419da7f8,
+};
+
+/* For example: 463ba1e4 & 0xfff */
+#define START_PC_PAGE_OFFSET 0x1e4
+
+/* For example: 463ba1a8 & 0xfff */
+#define START_LR_PAGE_OFFSET 0x1a8
+
+/* Each points to a two-page buffer */
+char *codePCCache, *codeLRCache;
+
+void dumpCode(int *pc, int *lr)
+{
+    unsigned int i;
+
+    for (i = 0; i < NUM_DUMPED_WORDS; i++) {
+        printf("%p codePC[%d]: %#010x\n", pc + i, i, pc[i]);
+    }
+
+    for (i = 0; i < NUM_DUMPED_WORDS; i++) {
+        printf("%p codeLR[%d]: %#010x\n", lr + i, i, lr[i]);
+    }
+}
+
+int main()
+{
+    codePCCache = memalign(4096, 8192);
+    codeLRCache = memalign(4096, 8192);
+
+    memcpy(codePCCache + START_PC_PAGE_OFFSET, codePC, 4 * NUM_DUMPED_WORDS);
+    memcpy(codeLRCache + START_LR_PAGE_OFFSET, codeLR, 4 * NUM_DUMPED_WORDS);
+
+    dumpCode((int *) (codePCCache + START_PC_PAGE_OFFSET),
+             (int *) (codeLRCache + START_LR_PAGE_OFFSET));
+
+    while (!done) {
+        sleep(1000);
+    }
+    return 0;
+}