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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/gdb/mozilla/jsop.py | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/gdb/mozilla/jsop.py')
-rw-r--r-- | js/src/gdb/mozilla/jsop.py | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/js/src/gdb/mozilla/jsop.py b/js/src/gdb/mozilla/jsop.py new file mode 100644 index 0000000000..635acb7528 --- /dev/null +++ b/js/src/gdb/mozilla/jsop.py @@ -0,0 +1,60 @@ +# 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/. + +# Pretty-printers for JSOp and jsbytecode values. + +import gdb +import gdb.types + +import mozilla.prettyprinters +from mozilla.prettyprinters import pretty_printer, ptr_pretty_printer + +# Forget any printers from previous loads of this module. +mozilla.prettyprinters.clear_module_printers(__name__) + + +class JSOpTypeCache(object): + # Cache information about the JSOp type for this objfile. + def __init__(self, cache): + self.tJSOp = gdb.lookup_type("JSOp") + + @classmethod + def get_or_create(cls, cache): + if not cache.mod_JSOp: + cache.mod_JSOp = cls(cache) + return cache.mod_JSOp + + +@pretty_printer("JSOp") +class JSOp(object): + def __init__(self, value, cache): + self.value = value + self.cache = cache + self.jotc = JSOpTypeCache.get_or_create(cache) + + def to_string(self): + # JSOp's storage type is |uint8_t|, but gdb uses a signed value. + # Manually convert it to an unsigned value. + # + # https://sourceware.org/bugzilla/show_bug.cgi?id=25325 + idx = int(self.value.cast(self.jotc.tJSOp.target())) + assert 0 <= idx and idx <= 255 + fields = self.jotc.tJSOp.fields() + if idx < len(fields): + return fields[idx].name + return "(JSOp) {:d}".format(idx) + + +@ptr_pretty_printer("jsbytecode") +class JSBytecodePtr(mozilla.prettyprinters.Pointer): + def __init__(self, value, cache): + super(JSBytecodePtr, self).__init__(value, cache) + self.jotc = JSOpTypeCache.get_or_create(cache) + + def to_string(self): + try: + opcode = str(self.value.dereference().cast(self.jotc.tJSOp)) + except Exception: + opcode = "bad pc" + return "{} ({})".format(self.value.cast(self.cache.void_ptr_t), opcode) |