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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/src/gdb/mozilla/CellHeader.py
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--js/src/gdb/mozilla/CellHeader.py25
1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/gdb/mozilla/CellHeader.py b/js/src/gdb/mozilla/CellHeader.py
new file mode 100644
index 0000000000..21dcba849d
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+++ b/js/src/gdb/mozilla/CellHeader.py
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+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import gdb
+
+
+def get_header_ptr(value, ptr_t):
+ # Return the pointer stored in Cell::header_ for subclasses of
+ # TenuredCellWithNonGCPointer and CellWithTenuredGCPointer.
+ return value["header_"]["value_"].cast(ptr_t)
+
+
+def get_header_length_and_flags(value, cache):
+ # Return the length and flags values for subclasses of
+ # CellWithLengthAndFlags.
+ flags = value["header_"]["value_"].cast(cache.uintptr_t)
+ try:
+ length = value["length_"]
+ except gdb.error:
+ # If we couldn't fetch the length directly, it must be stored
+ # within `flags`.
+ length = flags >> 32
+ flags = flags % 2**32
+ return length, flags