commit ecc71020f6e3e6db5a2e8dc87af354cf2c86733b Author: Georg Koppen gk@torproject.org Date: Fri Jun 17 09:49:16 2016 +0000

Bug 19417: Clear asmjscache

This patch clears the asmjscache (and the IndexedDB storage) on New Identity and during start-up. The latter is a suboptimal workaround we deploy until the asmjscache is Private Browsing Mode aware. InedxedDB storage is not so urgent as IndexedDB is not working in Private Browsing Mode anyway. --- src/chrome/content/torbutton.js | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)

diff --git a/src/chrome/content/torbutton.js b/src/chrome/content/torbutton.js index a293c44..539bd88 100644 --- a/src/chrome/content/torbutton.js +++ b/src/chrome/content/torbutton.js @@ -578,6 +578,23 @@ function torbutton_init() { torbutton_update_security_slider(); }

+ // XXX: Get rid of the cached asmjs (or IndexedDB) files on disk in case we + // don't allow things saved to disk. This is an ad-hoc fix to work around + // #19417. Once this is properly solved we should remove this code again. + if (m_tb_prefs.getBoolPref("extensions.torbutton.block_disk")) { + let orig_quota_test = m_tb_prefs.getBoolPref("dom.quotaManager.testing"); + try { + // This works only by setting the pref to `true` otherwise we get an + // exception and nothing is happening. + m_tb_prefs.setBoolPref("dom.quotaManager.testing", true); + Cc["@mozilla.org/dom/quota-manager-service;1"] + .getService(Ci.nsIQuotaManagerService).clear(); + } catch(e) { + } finally { + m_tb_prefs.setBoolPref("dom.quotaManager.testing", orig_quota_test); + } + } + // set panel style from preferences torbutton_set_panel_style();

@@ -1677,6 +1694,7 @@ function torbutton_new_identity() { * h. last open location url * i. clear content prefs * j. permissions + * k. IndexedDB and asmjscache storage * 3. Sends tor the NEWNYM signal to get a new circuit * 4. Opens a new window with the default homepage * 5. Closes this window @@ -1824,6 +1842,21 @@ function torbutton_do_new_identity() { window.alert("Torbutton: Unexpected error during cache clearing: "+e); }

+ torbutton_log(3, "New Identity: Clearing storage"); + + let orig_quota_test = m_tb_prefs.getBoolPref("dom.quotaManager.testing"); + try { + // This works only by setting the pref to `true` otherwise we get an + // exception and nothing is happening. + m_tb_prefs.setBoolPref("dom.quotaManager.testing", true); + Cc["@mozilla.org/dom/quota-manager-service;1"] + .getService(Ci.nsIQuotaManagerService).clear(); + } catch(e) { + torbutton_log(5, "Exception on storage clearing: "+e); + } finally { + m_tb_prefs.setBoolPref("dom.quotaManager.testing", orig_quota_test); + } + torbutton_log(3, "New Identity: Clearing Cookies and DOM Storage");

if (m_tb_prefs.getBoolPref('extensions.torbutton.cookie_protections')) {