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author | Luis Machado <luis.machado@linaro.org> | 2021-11-26 11:31:18 -0300 |
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committer | Luis Machado <luis.machado@linaro.org> | 2021-12-15 17:00:00 -0300 |
commit | 261b07488b9dfe69090e6980f6de9d0f4f3f03ca (patch) | |
tree | c962f1627fd0fa4daa203300f8fc2fc77fd0c47b /gdb | |
parent | 4d3605c8ca92bcde848581a8ec031827c798501b (diff) | |
download | gdb-261b07488b9dfe69090e6980f6de9d0f4f3f03ca.zip gdb-261b07488b9dfe69090e6980f6de9d0f4f3f03ca.tar.gz gdb-261b07488b9dfe69090e6980f6de9d0f4f3f03ca.tar.bz2 |
New --enable-threading configure option to control use of threads in GDB/GDBserver
Add the --enable-threading configure option so multithreading can be disabled
at configure time. This is useful for statically-linked builds of
GDB/GDBserver, since the thread library doesn't play well with that setup.
If you try to run a statically-linked GDB built with threading, it will crash
when setting up the number of worker threads.
This new option is also convenient when debugging GDB in a system with lots of
threads, where the thread discovery code in GDB will emit too many messages,
like so:
[New Thread 0xfffff74d3a50 (LWP 2625599)]
If you have X threads, that message will be repeated X times.
The default for --enable-threading is "yes".
Diffstat (limited to 'gdb')
-rw-r--r-- | gdb/NEWS | 11 | ||||
-rwxr-xr-x | gdb/configure | 24 |
2 files changed, 34 insertions, 1 deletions
@@ -3,6 +3,17 @@ *** Changes since GDB 11 +* Configure changes + +--enable-threading + + Enable or disable multithreaded symbol loading. This is enabled + by default, but passing --disable-threading or --enable-threading=no + to configure will disable it. + + Disabling this can cause a performance penalty when there are a lot of + symbols to load, but is useful for debugging purposes. + * New commands maint set backtrace-on-fatal-signal on|off diff --git a/gdb/configure b/gdb/configure index 448167f..d13ab37 100755 --- a/gdb/configure +++ b/gdb/configure @@ -910,6 +910,7 @@ with_python with_python_libdir with_guile enable_source_highlight +enable_threading with_intel_pt with_libipt_prefix with_libipt_type @@ -1597,6 +1598,8 @@ Optional Features: --disable-rpath do not hardcode runtime library paths --enable-source-highlight enable source-highlight for source listings + --enable-threading include support for parallel processing of data + (yes/no) --enable-werror treat compile warnings as errors --enable-build-warnings enable build-time compiler warnings if gcc is used --enable-gdb-build-warnings @@ -14065,6 +14068,22 @@ fi done + # ----------------------- # + # Check for threading. # + # ----------------------- # + + # Check whether --enable-threading was given. +if test "${enable_threading+set}" = set; then : + enableval=$enable_threading; case "$enableval" in + yes) want_threading=yes ;; + no) want_threading=no ;; + *) as_fn_error $? "bad value $enableval for threading" "$LINENO" 5 ;; + esac +else + want_threading=yes +fi + + # Check for std::thread. This does not work on some platforms, like # mingw and DJGPP. ac_ext=cpp @@ -14762,10 +14781,13 @@ done LIBS="$save_LIBS" CXXFLAGS="$save_CXXFLAGS" fi - if test "$gdb_cv_cxx_std_thread" = "yes"; then + + if test "$want_threading" = "yes"; then + if test "$gdb_cv_cxx_std_thread" = "yes"; then $as_echo "#define CXX_STD_THREAD 1" >>confdefs.h + fi fi ac_ext=c ac_cpp='$CPP $CPPFLAGS' |