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73 lines
2.4 KiB
73 lines
2.4 KiB
4 months ago
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#
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# Copyright (C) 2014 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ART debugging. ART uses SIGSEGV signals for internal purposes. To allow
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# gdb to debug programs using ART we need to treat this signal specially. We
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# also set a breakpoint in a libart.so function to stop when the program
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# hits an unexpected breakpoint
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set $art_debug_enabled = 0
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define art-on
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if $art_debug_enabled == 0
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# deal with SIGSEGV signals
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handle SIGSEGV noprint nostop pass
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# set a breakpoint and record its number
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set breakpoint pending on
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break art_sigsegv_fault
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set $art_bpnum = $bpnum
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commands $art_bpnum
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silent
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printf "Caught SIGSEGV in user program\n"
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end
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set breakpoint pending auto
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printf "ART debugging mode is enabled.\n"
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printf "If you are debugging a native only process, you need to\n"
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printf "re-enable normal SIGSEGV handling using this command:\n"
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printf " handle SIGSEGV print stop\n"
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set $art_debug_enabled = 1
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else
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printf "ART debugging mode is already enabled.\n"
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end
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end
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document art-on
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Enter ART debugging mode. In ART debugging mode, SIGSEGV signals are ignored
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by gdb unless they are not handled by ART itself. A breakpoint is
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set to stop the program when an unexpected SIGSEGV signal is
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encountered.
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To switch ART debugging mode off, use "art-off"
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end
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define art-off
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if $art_debug_enabled == 1
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# restore SIGSEGV to its default
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handle SIGSEGV print stop pass
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# delete our breakpoint
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delete $art_bpnum
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set $art_debug_enabled = 0
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printf "ART debugging mode is disabled.\n"
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end
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end
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document art-off
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Leave ART debugging mode. Signal handling is restored to default settings.
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Use the command "art-on" to enable ART debugging mode.
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end
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