On Fri, 13 Nov 2026 05:29:13 GMT, Koichi Sakata <[email protected]> wrote:
>> This PR prevents the `clhsdb pstack` command from throwing a >> `DebuggerException` when obtaining the top frame. The exception occurs when >> the PC is within a native library that has no `.eh_frame` section. >> >> I added a test, `ClhsdbPstackNoEhFrame.java`, that uses a native library >> without an `.eh_frame` section. The test fails with a `DebuggerException` >> without the fix in `LinuxAARCH64CFrame.java`. >> >> `getFrameFromReg()` returns the current frame without DWARF information if >> DWARF parsing fails and the PC is within a known native library. Unwinding >> stops at this frame, but analysis continues for other threads. This behavior >> is consistent with the existing `sender()` method. >> >> #### Testing >> I've run the following tests on Linux AArch64. >> >> $ make run-test >> TEST="jtreg:hotspot/jtreg/serviceability/sa/ClhsdbPstackNoEhFrame.java" >> TEST TOTAL PASS FAIL ERROR >> SKIP >> jtreg:test/hotspot/jtreg/serviceability/sa/ClhsdbPstackNoEhFrame.java >> 1 1 0 0 >> 0 >> $ make run-test TEST="jtreg:hotspot/jtreg/serviceability/sa/" >> TEST TOTAL PASS FAIL ERROR >> SKIP >> jtreg:test/hotspot/jtreg/serviceability/sa 81 76 0 0 >> 5 >> >> --------- >> - [x] I confirm that I make this contribution in accordance with the >> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). > > Koichi Sakata has updated the pull request incrementally with one additional > commit since the last revision: > > Try to read .debug_frame if no .eh_frame I've applied the changes and confirmed that the `pstack` outputs of the 1st and 2nd cases have the caller information. Regarding the test patterns, should I create the following 3 cases? - no `.eh_frame`, but `.debug_frame` in the library - has `.eh_frame`, but it doesn't cover the target function. `.debug_frame` in the library has the FDE of the function - no available information for the target function in `.eh_frame` and `.debug_frame` in the library or external debuginfo ------------- PR Comment: https://git.openjdk.org/jdk/pull/33839#issuecomment-6845119232
