We already enable -fstrict-aliasing when gcc >= 4.6.0 but let's enable it for
gcc < 4.5.0 as well. The aliasing bugs that we ran into in the past are all
particular to the 4.5.x releases.
This commit enables ETW events to be fired on Windows for existing
DTrace probes. ETW instrumentation is enabled by default. It
is possible to build node.exe without ETW instrumentation by
using --without-etw option with configure script.
* fixes#2110
* includes V8 postmortem metadata in Solaris builds
* adds GYP support for DTrace probes and ustack helper
* ustack helper derives constants dynamically from libv8_base.a
* build with DTrace support by default on SunOS
A compiler bug in older versions of gcc makes it do unsafe optimizations at -O1
and higher. This manifested itself with (at least) gcc 4.5.2 on SmartOS because
it made V8 hang in a busy loop.
See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45883
On one of my OS X Lion machines, it always reports i386, even though 64-bit
is supported. This lookup better matches how WAF determines the host arch,
which was correctly getting 64-bit even on this screwy machine.
It was decided that the performance benefits that isolates offer (faster spin-up
times for worker processes, faster inter-worker communication, possibly a lower
memory footprint) are not actual bottlenecks for most people and do not outweigh
the potential stability issues and intrusive changes to the code base that
first-class support for isolates requires.
Hence, this commit backs out all isolates-related changes.
Good bye, isolates. We hardly knew ye.
We keep around WAF for node-waf only.
We need great diligence by people over the next couple weeks to work out all
the kinks in the GYP build system. We realize that it is currently several
times slower than the WAF build. Please lend a hand.
Fixes#1504Fixes#1500