diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/Makefile.new | 5 | ||||
| -rw-r--r-- | src/libexpr/eval.cc | 17 |
2 files changed, 22 insertions, 0 deletions
diff --git a/src/libexpr/Makefile.new b/src/libexpr/Makefile.new index ded112107fe8..cbae11c53c20 100644 --- a/src/libexpr/Makefile.new +++ b/src/libexpr/Makefile.new @@ -9,6 +9,11 @@ libexpr_SOURCES = \ libexpr_LIBS = libutil libstore libformat +# The dependency on libgc must be propagated (i.e. meaning that +# programs/libraries that use libexpr must explicitly pass -lgc), +# because inline functions in libexpr's header files call libgc. +libexpr_LDFLAGS_PROPAGATED = $(BDW_GC_LIBS) + $(d)/parser-tab.cc $(d)/parser-tab.hh: $(d)/parser.y bison -v -o $(libexpr_DIR)/parser-tab.cc $< -d diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc index e4a0d7fd2b3e..12c6aa8dcd44 100644 --- a/src/libexpr/eval.cc +++ b/src/libexpr/eval.cc @@ -129,6 +129,14 @@ string showType(const Value & v) } +/* Called when the Boehm GC runs out of memory. */ +static void * oomHandler(size_t requested) +{ + /* Convert this to a proper C++ exception. */ + throw std::bad_alloc(); +} + + EvalState::EvalState() : sWith(symbols.create("<with>")) , sOutPath(symbols.create("outPath")) @@ -158,6 +166,14 @@ EvalState::EvalState() #if HAVE_BOEHMGC static bool gcInitialised = false; if (!gcInitialised) { + + /* Initialise the Boehm garbage collector. This isn't + necessary on most platforms, but for portability we do it + anyway. */ + GC_INIT(); + + GC_oom_fn = oomHandler; + /* Set the initial heap size to something fairly big (25% of physical RAM, up to a maximum of 384 MiB) so that in most cases we don't need to garbage collect at all. (Collection @@ -181,6 +197,7 @@ EvalState::EvalState() debug(format("setting initial heap size to %1% bytes") % size); GC_expand_hp(size); } + gcInitialised = true; } #endif |