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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 13
Affects Version/s: 11, 12, 13
Component/s: hotspot
Labels:

Subcomponent:
runtime
Resolved In Build:
b06

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8219340	12.0.2	Aleksey Shipilev	P4	Resolved	Fixed	b01
JDK-8226578	11.0.5-oracle	Aleksey Shipilev	P4	Resolved	Fixed	b02
JDK-8219345	11.0.3	Aleksey Shipilev	P4	Resolved	Fixed	master

Today, accidentally calling os::print_hex_dump on unreadable memory would SEGV. It would probably be the second SEGV in the error reporting code that wants to dump some raw memory. We can use os::is_readable_pointer to query readable memory before reading it. For example:
http://cr.openjdk.java.net/~shade/8217994/webrev.01/

backported by

JDK-8219340 os::print_hex_dump should be more resilient against unreadable memory

Resolved

JDK-8219345 os::print_hex_dump should be more resilient against unreadable memory

Resolved

JDK-8226578 os::print_hex_dump should be more resilient against unreadable memory

Resolved

relates to

JDK-8293851 hs_err should print more stack in hex dump

Resolved

JDK-8219650 [TESTBUG] Fix crashes in new test hotspot gtest "test_print_hex_dump"

Resolved

JDK-8257828 SafeFetch may crash if invoked in non-JavaThreads

Resolved

JDK-8217879 hs_err should print more instructions in hex dump

Resolved

(2 relates to)

Assignee:: Aleksey Shipilev

Reporter:: Aleksey Shipilev

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: 2019-01-29 08:03

Updated:: 2022-09-15 02:14

Resolved:: 2019-01-30 10:52

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