Re: [PATCH] fix a crash in libsvn_wc

(sorry, for me subversion is code at-first-sight)

in the plugin it seems that this code happens:
//======================================================
      svn_client_ctx_t ctx;
      memset(&ctx, 0, sizeof(ctx));

      // get the config based on the configDir passed in
      svn_config_get_config(&ctx.config, c_configDir, pool);

      // tell the auth functions where the config is
      svn_auth_set_parameter(ab, SVN_AUTH_PARAM_CONFIG_DIR,
                             c_configDir);

      ctx.auth_baton = ab;
      ctx.log_msg_func = onLogMsg;
      ctx.log_msg_baton = this;
      ctx.notify_func = onNotify;
      ctx.notify_baton = this;
      ctx.cancel_func = onCancel;
      ctx.cancel_baton = this;

#if (SVN_VER_MAJOR >= 1) && (SVN_VER_MINOR >= 2)
      ctx.notify_func2 = onNotify2;
      ctx.notify_baton2 = this;
#endif
//======================================================

so missing from here, as I understand is svn_client_create_context

-----------------------------------------------------------------------------------------------------
following is the backtrace:
#0 0xaeae5081 in svn_wc__db_wcroot_parse_local_abspath (wcroot=0xae569d18,
local_relpath=0xae569d1c, db=0x0, local_abspath=
    0xaec4e508 "/home/georgeg/Projects/TestKdev4.1",
result_pool=0xaec44018, scratch_pool=0xaec44018)
    at subversion/libsvn_wc/wc_db_wcroot.c:383
#1 0xaeadb001 in svn_wc__db_read_info (status=0xae569dd8, kind=0xae569dd0,
revision=0x0, repos_relpath=0x0, repos_root_url=0x0,
    repos_uuid=0x0, changed_rev=0x0, changed_date=0x0, changed_author=0x0,
depth=0x0, checksum=0x0, target=0x0, original_repos_relpath=
    0x0, original_root_url=0x0, original_uuid=0x0, original_revision=0x0,
lock=0x0, recorded_size=0x0, recorded_mod_time=0x0, changelist=
    0x0, conflicted=0x0, op_root=0x0, have_props=0x0, props_mod=0x0,
have_base=0x0, have_more_work=0x0, have_work=0x0, db=0x0,
    local_abspath=0xaec4e508 "/home/georgeg/Projects/TestKdev4.1",
result_pool=0xaec44018, scratch_pool=0xaec44018)
    at subversion/libsvn_wc/wc_db.c:6764
#2 0xaeaa80f5 in svn_wc__internal_walk_children (db=0x0,
local_abspath=0xaec4e508 "/home/georgeg/Projects/TestKdev4.1",
show_hidden=0,
    changelist_filter=0x0, walk_callback=0xaeaa09a0
<info_found_node_callback>, walk_baton=0xae569e50,
walk_depth=svn_depth_empty,
    cancel_func=0xaecafb50 <svn::Context::Data::onCancel(void*)>,
cancel_baton=0x844e658, scratch_pool=0xaec44018)
    at subversion/libsvn_wc/node.c:697
#3 0xaeaa182b in svn_wc__get_info (wc_ctx=0xb69789dc,
local_abspath=0xaec4e508 "/home/georgeg/Projects/TestKdev4.1", depth=
    svn_depth_empty, fetch_excluded=0, fetch_actual_only=1,
changelist_filter=0x0, receiver=0xaec1b160 <wc_info_receiver>,
receiver_baton=
    0xae569f2c, cancel_func=0xaecafb50
<svn::Context::Data::onCancel(void*)>, cancel_baton=0x844e658,
scratch_pool=0xaec4e018)
    at subversion/libsvn_wc/info.c:453
#4 0xaec1b7e5 in svn_client_info3 (abspath_or_url=0xaec4e508
"/home/georgeg/Projects/TestKdev4.1", peg_revision=0xaecd3868, revision=
    0xaecd3868, depth=svn_depth_empty, fetch_excluded=0,
fetch_actual_only=1, changelists=0x0, receiver=
    0xaec0f0f0 <info_receiver_relpath_wrapper>, receiver_baton=0xae569fc8,
ctx=0x844e674, pool=0xaec4e018)
    at subversion/libsvn_client/info.c:299
#5 0xaec1284e in svn_client_info2 (path_or_url=0xadc01ad4
"/home/georgeg/Projects/TestKdev4.1", peg_revision=0xaecd3868, revision=
    0xaecd3868, receiver=0xaecadfd0 <svn::infoReceiverFunc(void*, char
const*, svn_info_t const*, apr_pool_t*)>, receiver_baton=
    0xae56a14c, depth=svn_depth_empty, changelists=0x0, ctx=0x844e674,
pool=0xaec4e018) at subversion/libsvn_client/deprecated.c:2343
#6 0xaec12903 in svn_client_info (path_or_url=0xadc01ad4
"/home/georgeg/Projects/TestKdev4.1", peg_revision=0xaecd3868, revision=
    0xaecd3868, receiver=0xaecadfd0 <svn::infoReceiverFunc(void*, char
const*, svn_info_t const*, apr_pool_t*)>, receiver_baton=
    0xae56a14c, recurse=0, ctx=0x844e674, pool=0xaec4e018) at
subversion/libsvn_client/deprecated.c:2367
#7 0xaecace37 in svn::Client::info (this=0xae56a158, pathOrUrl=...,
recurse=false, revision=..., pegRevision=...)
    at
/usr/src/debug/kdevplatform-1.2.3/plugins/subversion/kdevsvncpp/client_status.cpp:404

On Wed, Aug 29, 2012 at 2:00 PM, Bert Huijben <bert_at_qqmail.nl> wrote:

> The db pointer comes directly from svn_wc_context_t, which should come
> directly from svn_client_ctx_t, where it is always added on proper
> initialization using the constructor function****
>
> ** **
>
> So while I agree that it should not crash, there is no way that any code
> should reach this point without some calling problem.****
>
> ** **
>
> Are you sure you create the svn_client_ctx_t using the constructor
> function?****
>
> ** **
>
> (We had some earlier issues where users just created the struct and
> assumed that initializing all the 1.6 members was enough to get 1.7
> working… For 1.7 this is not enough)****
>
> ** **
>
> Bert****
>
> ** **
>
> *From:* George Gugulea [mailto:gugulea_at_gmail.com]
> *Sent:* dinsdag 28 augustus 2012 18:10
> *To:* dev_at_subversion.apache.org
> *Subject:* Re: [PATCH] fix a crash in libsvn_wc****
>
> ** **
>
> [[[****
>
> Used from the kdevelop subversion plugin, the db pointers comes NULL. This
> should be treated one way or another, I choose to return error and not an
> assert because it might be a recoverable error. This should be reviewed and
> an appropriate action should be taken.****
>
> ]]]****
>
> ** **
>
> attached is the patch for the last svn revision (1378109) of the file****
>
> --
> gg****
>

-- 
gg