src-test2/usr.bin/gcore, branch releng/11.2

Revert r330897:

2018-03-29T02:50:57Z

This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code. Revert with prejudice. This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes. Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes. Requested by: gjb (re)

Partial merge of the SPDX changes

2018-03-14T03:19:51Z

These changes are incomplete but are making it difficult to determine what other changes can/should be merged. No objections from: pfg

MFC r326276:

2018-03-05T07:26:05Z

various: general adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.

MFC 323584: Add a NT_ARM_VFP ELF core note to hold VFP registers for each thread.

2017-11-15T02:03:38Z

The core note matches the format and layout of NT_ARM_VFP on Linux. Debuggers use the AT_HWCAP flags to determine how many VFP registers are actually used and their format.

MFC r320481:

2017-10-27T04:38:42Z

Store a 32-bit PT_LWPINFO struct for 32-bit process core dumps.

MFC r316286:

2017-10-23T18:25:21Z

Add support for capturing 'struct ptrace_lwpinfo' for signals resulting in a process dumping core in the corefile. Direct stable changed: Padding added to struct thread and td_si added to end with explicit bzeroing when forking/initializing a thread to preserve KBI.

MFC 313407,313449: Copy ELF machine/flags from binaries to core dumps.

2017-05-11T17:26:34Z

313407: Copy the e_machine and e_flags fields from the binary into an ELF core dump. In the kernel, cache the machine and flags fields from ELF header to use in the ELF header of a core dump. For gcore, the copy these fields over from the ELF header in the binary. This matters for platforms which encode ABI information in the flags field (such as o32 vs n32 on MIPS). 313449: Trim trailing whitespace (mostly introduced in r313407). Sponsored by: DARPA / AFRL

MFC 303002: Include process IDs in core dumps.

2016-10-28T03:54:19Z

When threads were added to the kernel, the pr_pid member of the NT_PRSTATUS note was repurposed to store LWP IDs instead of process IDs. However, the process ID was no longer recorded in core dumps. This change adds a pr_pid field to prpsinfo (NT_PRSINFO). Rather than bumping the prpsinfo version number, note parsers can use the note's payload size to determine if pr_pid is present.

MFC 302859: Include command line arguments in core dump process info.

2016-10-06T21:17:18Z

Fill in pr_psargs in the NT_PRSINFO ELF core dump note with command line arguments.

gcore: Forward pending signals when detaching from the target.

2016-06-24T20:21:32Z

Otherwise gcore's ptrace attach operation can race with delivery of a signal and cause it to be lost. In collaboration with: Suraj Raju Reviewed by: bdrewery Approved by: re (gjb, kib) MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division