search for: deserialised

Hello, I am trying to isolate an assertion failure in if-converter (on PPC) and I generated a textual debuglog with: ``` LLVM_ARGS=-print-before-all -print-module-scope -filter-print-funcs=japi1__require_7687 ``` and after splicing out the the MIR before the if-converter pass I would like to run `llc -march=ppc64le -run-pass=if-converter input.mir` so that I can start minimising the MIR. This

Hello Valentin, To generate a mir test case i think the process is to first create an IR file by passing '-S -emit-llvm' to clang, then you can feed that file into llc and use stop-before to get the mir just before the if-converter pass, eg: `llc -stop-before=if-converter -simplify-mir -o test.mir test.ll`. Also there is a MIR language reference: https://llvm.org/docs/MIRLangRef.html

Thank you both! I was running into the issue that bugpoint was reducing my test-case into other failures and I hadn't managed yet to find the right point in the Julia pass pipeline to insert the module to reproduce the issue reliably from llc and that's why I started looking at using the MIR. I will go back at looking at the pass pipeline and the IR and get a reproducer that way!

...s->len = ret; + dirents->val = safe_realloc (g, dirents->val, + dirents->len * + sizeof (struct guestfs_tsk_dirent)); + + return dirents; +} + +/* Deserialise buf content and populate the dirent list. + * Return the number of deserialised dirents, -1 on error. + */ +int +deserialise_dirent_list (guestfs_h *g, char *buf, size_t bufsize, + struct guestfs_tsk_dirent_list **dirents) +{ + XDR xdr; + int ret = 0; + uint32_t index = 0; + + xdrmem_create (&xdr, buf, bufsize, XDR_DECODE); + + for (index = 0;...

Valentin, in terms of limitations as Sean pointed out, an important one is that .mir doesn't have MachineFunctionInfo which may result in failure on accesses to global variables due to use of register X2. The verifier considers it an undefined register. Also, it's probably easier to reduce test cases using bugpoint starting from an IR test case. With the code you provided, I get a

...deserialise_dirent_list (g, buf, bufsize, dirents); > + if (ret < 0) { > + guestfs_free_tsk_dirent_list (dirents); > + return NULL; > + } > + > + return dirents; > +} > + > +/* Deserialise buf content and populate the dirent list. > + * Return the number of deserialised dirents, -1 on error. > + */ > +int > +deserialise_dirent_list (guestfs_h *g, char *buf, size_t bufsize, > + struct guestfs_tsk_dirent_list *dirents) > +{ > + XDR xdr; > + bool_t ret = 0; > + uint32_t index = 0; > + > + xdrmem_create (&x...

...ct guestfs_tsk_dirent)); You don't need to shrink the array with values -- users knows already they don't have to access it past 'len' values. > + > + return dirents; > +} > + > +/* Deserialise buf content and populate the dirent list. > + * Return the number of deserialised dirents, -1 on error. > + */ > +int > +deserialise_dirent_list (guestfs_h *g, char *buf, size_t bufsize, > + struct guestfs_tsk_dirent_list **dirents) Since you don't change the location of 'dirents', you don't need to pass a pointer to it to cha...

In our fork of LLVM we often need to reduce a crash testcase for a specific assertion. After writing lots of "only give me this specific assertion" scripts like the above I decided to write a script that automates all this for me: <https://github.com/CTSRD-CHERI/clang/blob/master/utils/creduce_crash_testcase.py>. (It's called creduce_crash_test.py but it will actually use

...to detection list. */ + ret = deserialise_yara_detection_list (g, fp, detections); + if (ret < 0) { + guestfs_free_yara_detection_list (detections); + return NULL; + } + + return detections; +} + +/* Deserialise the file content and populate the detection list. + * Return the number of deserialised detections, -1 on error. + */ +static int +deserialise_yara_detection_list (guestfs_h *g, FILE *fp, + struct guestfs_yara_detection_list *detections) +{ + XDR xdr; + int ret = 0; + uint32_t index = 0; + struct stat statbuf; + + ret = fstat (fileno(fp), &stat...

I'm not sure if this helps, but here it is in case it does. I typically use bugpoint in a way as to keep the actual failure that I'm after. For example, with the test case you've pasted, I was looking for a specific assert. So I used bugpoint this way: $ cat reduceme.sh #!/bin/bash llc -filetype=obj $1 2>&1 | grep 'Cannot lower calls with arbitrary operand bundles'

...to detection list. */ + ret = deserialise_yara_detection_list (g, fp, detections); + if (ret < 0) { + guestfs_free_yara_detection_list (detections); + return NULL; + } + + return detections; +} + +/* Deserialise the file content and populate the detection list. + * Return the number of deserialised detections, -1 on error. + */ +static int +deserialise_yara_detection_list (guestfs_h *g, FILE *fp, + struct guestfs_yara_detection_list *detections) +{ + XDR xdr; + int ret = 0; + uint32_t index = 0; + struct stat statbuf; + + ret = fstat (fileno(fp), &stat...

...to detection list. */ + ret = deserialise_yara_detection_list (g, fp, detections); + if (ret < 0) { + guestfs_free_yara_detection_list (detections); + return NULL; + } + + return detections; +} + +/* Deserialise the file content and populate the detection list. + * Return the number of deserialised detections, -1 on error. + */ +static int +deserialise_yara_detection_list (guestfs_h *g, FILE *fp, + struct guestfs_yara_detection_list *detections) +{ + XDR xdr; + int ret = 0; + uint32_t index = 0; + struct stat statbuf; + + ret = fstat (fileno(fp), &stat...

...t (g, fp, detections); + if (r == -1) { + guestfs_free_yara_detection_list (detections); + perrorf (g, "guestfs_free_yara_detection_list"); + return NULL; + } + + return detections; +} + +/* Deserialise the file content and populate the detection list. + * Return the number of deserialised detections, -1 on error. + */ +static int +deserialise_yara_detection_list (guestfs_h *g, FILE *fp, + struct guestfs_yara_detection_list *detections) +{ + XDR xdr; + int r = 0; + uint32_t index = 0; + struct stat statbuf; + + r = fstat (fileno(fp), &statbuf)...

...Deserialise buffer into dirent list. */ + ret = deserialise_dirent_list (g, buf, bufsize, dirents); + if (ret < 0) { + guestfs_free_tsk_dirent_list (dirents); + return NULL; + } + + return dirents; +} + +/* Deserialise buf content and populate the dirent list. + * Return the number of deserialised dirents, -1 on error. + */ +int +deserialise_dirent_list (guestfs_h *g, char *buf, size_t bufsize, + struct guestfs_tsk_dirent_list *dirents) +{ + XDR xdr; + bool_t ret = 0; + uint32_t index = 0; + + xdrmem_create (&xdr, buf, bufsize, XDR_DECODE); + + for (index = 0...

...;t have to access it past 'len' values. > If I then run the command in guestfish I get plenty of empty structs. > > > + > > + return dirents; > > +} > > + > > +/* Deserialise buf content and populate the dirent list. > > + * Return the number of deserialised dirents, -1 on error. > > + */ > > +int > > +deserialise_dirent_list (guestfs_h *g, char *buf, size_t bufsize, > > + struct guestfs_tsk_dirent_list **dirents) > > Since you don't change the location of 'dirents', you don't need t...

...+ /* Deserialise buffer into dirent list. */ + ret = deserialise_dirent_list (g, fp, dirents); + if (ret < 0) { + guestfs_free_tsk_dirent_list (dirents); + return NULL; + } + + return dirents; +} + +/* Deserialise the file content and populate the dirent list. + * Return the number of deserialised dirents, -1 on error. + */ +static int +deserialise_dirent_list (guestfs_h *g, FILE *fp, + struct guestfs_tsk_dirent_list *dirents) +{ + XDR xdr; + bool_t ret = 0; + int statret = 0; + uint32_t index = 0; + struct stat statbuf; + + statret = fstat (fileno(fp), &sta...

v2: - Increased the amount of collected information from the FS content. - Moved filesystem_walk0 as internal command. - Code improvement based on comments. - Adhere to project's coding style. - Better command documentation. - More robust tests. Patch ready for review, code available at: https://github.com/noxdafox/libguestfs/tree/filesystem_walk Matteo Cafasso (5): generator:

...et and set the properties (they''re not stored simply in instance variables that I can access), and I don''t want to change the class any more than I have to. Can anyone offer any pointers on how to get some custom code executed when an instance of such a class is serialised and deserialised? What I''d like to do is, when I call YAML.dump(), and it sees an instance of the legacy class, to convert it into some data structure and dump that, and do the reverse on YAML.load(). I''m guessing I can do part of this with the to_yaml() function, but I haven''t been...

v3: - File size will be reported as - 1 if it cannot be retrieved. - Code improvements based on comments. Matteo Cafasso (5): generator: Added tsk_dirent struct configure: Added libtsk compile-time check daemon: Added internal_filesystem_walk command appliance: Added filesystem_walk command appliance: Added filesystem_walk command tests daemon/Makefile.am | 4 +-

v8: - rebase on master - bump version to 1.33.37 - squash commits 1, 2, 3 Kept original commits messages when squashing them. Matteo Cafasso (3): New API: internal_filesystem_walk New API: filesystem_walk lib: Added filesystem_walk command tests daemon/Makefile.am | 4 +- daemon/tsk.c | 249 ++++++++++++++++++++++++++++++++++++++