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298 lines
9.8 KiB
298 lines
9.8 KiB
9 months ago
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Maintain an explicit order of tunables, so that the tunable_list
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array and the tunable_id_t constant can remain consistent over time.
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Related to this upstream bug:
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Internal tunables ABI depends on awk array iteration order
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<https://sourceware.org/bugzilla/show_bug.cgi?id=30027>
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The new dl-tunables.list files are already on the sysdeps search
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path, which is why the existing Makeconfig rule picks them up.
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The files for RHEL 8.7.z were created by applying the gen-tunables.awk
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part of this patch to RHEL 8.7.0 (glibc-2.28-211.el8_7, to be precise).
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The sysdeps/unix/sysv/linux/**/dl-tunables.list files were created
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based on the generated error message during the RHEL 8.7.z build.
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Afterwards, the glibc.rtld.dynamic_sort tunable was added at the
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end of the files, for the RHEL 8.8.0 build.
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Going forward, new tunables will have to be added manually to the end
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of those files. Existing tunables should not be deleted. For
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deletion, the script would have to be extended to be able to create
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gaps in the tunable_list array.
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diff --git a/scripts/gen-tunables.awk b/scripts/gen-tunables.awk
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index 622199061a140ccd..8ebfb560976ead41 100644
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--- a/scripts/gen-tunables.awk
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+++ b/scripts/gen-tunables.awk
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@@ -12,6 +12,7 @@ BEGIN {
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tunable=""
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ns=""
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top_ns=""
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+ tunable_order_count = 0
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}
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# Skip over blank lines and comments.
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@@ -78,6 +79,37 @@ $1 == "}" {
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next
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}
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+$1 == "@order" {
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+ if (top_ns != "") {
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+ printf("%s:%d: error: invalid @order directive inside namespace %s\n",
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+ FILENAME, FNR, top_ns) > "/dev/stderr"
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+ exit 1
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+ }
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+ if (NF != 2) {
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+ printf("%s:%d: error: invalid argument count in @order directive\n",
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+ FILENAME, FNR) > "/dev/stderr"
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+ exit 1
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+ }
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+ order_arg = $2
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+ if (split(order_arg, indices, /\./) != 3) {
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+ printf("%s:%d: error: invalid tunable syntax in @order directive\n",
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+ FILENAME, FNR) > "/dev/stderr"
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+ exit 1
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+ }
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+ t = indices[1]
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+ n = indices[2]
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+ m = indices[3]
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+ if ((t, n, m) in tunable_order) {
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+ printf("%s:%d: error: duplicate\"@order %s\"\n" \
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+ FILENAME, FNR, order_arg) > "/dev/stderr"
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+ exit 1
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+ }
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+ ++tunable_order_count
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+ tunable_order[t,n,m] = tunable_order_count
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+ tunable_order_list[tunable_order_count] = t SUBSEP n SUBSEP m
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+ next
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+}
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+
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# Everything else, which could either be a tunable without any attributes or a
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# tunable attribute.
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{
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@@ -137,6 +169,31 @@ END {
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exit 1
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}
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+ missing_order = 0
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+ for (tnm in types) {
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+ if (!(tnm in tunable_order)) {
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+ if (!missing_order) {
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+ print "error: Missing @order directives:" > "/dev/stderr"
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+ missing_order = 1
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+ }
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+ split(tnm, indices, SUBSEP)
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+ printf("@order %s.%s.%s\n", indices[1], indices[2], indices[3]) \
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+ > "/dev/stderr"
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+ }
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+ }
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+ for (i = 1; i <= tunable_order_count; ++i) {
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+ tnm = tunable_order_list[i]
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+ if (!(tnm in types)) {
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+ split(tnm, indices, SUBSEP)
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+ printf("error: tunable in \"@order %s.%s.%s\" not known\n", \
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+ indices[1], indices[2], indices[3]) > "/dev/stderr"
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+ missing_order = 1
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+ }
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+ }
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+ if (missing_order) {
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+ exit 1
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+ }
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+
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print "/* AUTOGENERATED by gen-tunables.awk. */"
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print "#ifndef _TUNABLES_H_"
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print "# error \"Do not include this file directly.\""
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@@ -147,7 +204,8 @@ END {
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# Now, the enum names
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print "\ntypedef enum"
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print "{"
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- for (tnm in types) {
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+ for (i = 1; i <= tunable_order_count; ++i) {
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+ tnm = tunable_order_list[i]
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split (tnm, indices, SUBSEP);
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t = indices[1];
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n = indices[2];
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@@ -159,7 +217,8 @@ END {
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# Finally, the tunable list.
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print "\n#ifdef TUNABLES_INTERNAL"
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print "static tunable_t tunable_list[] attribute_relro = {"
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- for (tnm in types) {
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+ for (i = 1; i <= tunable_order_count; ++i) {
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+ tnm = tunable_order_list[i]
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split (tnm, indices, SUBSEP);
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t = indices[1];
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n = indices[2];
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diff --git a/sysdeps/unix/sysv/linux/aarch64/dl-tunables.list b/sysdeps/unix/sysv/linux/aarch64/dl-tunables.list
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new file mode 100644
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index 0000000000000000..5c3c5292025607a1
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/aarch64/dl-tunables.list
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@@ -0,0 +1,26 @@
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+# Order of tunables in RHEL 8.7.0.
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+@order glibc.rtld.nns
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+@order glibc.elision.skip_lock_after_retries
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+@order glibc.malloc.trim_threshold
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+@order glibc.malloc.perturb
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+@order glibc.cpu.name
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+@order glibc.elision.tries
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+@order glibc.elision.enable
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+@order glibc.malloc.mxfast
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+@order glibc.elision.skip_lock_busy
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+@order glibc.malloc.top_pad
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+@order glibc.cpu.hwcap_mask
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+@order glibc.malloc.mmap_max
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+@order glibc.elision.skip_trylock_internal_abort
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+@order glibc.malloc.tcache_unsorted_limit
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+@order glibc.elision.skip_lock_internal_abort
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+@order glibc.malloc.arena_max
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+@order glibc.malloc.mmap_threshold
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+@order glibc.malloc.tcache_count
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+@order glibc.malloc.arena_test
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+@order glibc.rtld.optional_static_tls
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+@order glibc.malloc.tcache_max
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+@order glibc.malloc.check
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+
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+# Tunables added in RHEL 8.8.0
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+@order glibc.rtld.dynamic_sort
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diff --git a/sysdeps/unix/sysv/linux/i386/dl-tunables.list b/sysdeps/unix/sysv/linux/i386/dl-tunables.list
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new file mode 100644
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index 0000000000000000..b9cad4af62d9f2e5
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/i386/dl-tunables.list
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@@ -0,0 +1,33 @@
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+# Order of tunables in RHEL 8.7.0.
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+@order glibc.rtld.nns
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+@order glibc.elision.skip_lock_after_retries
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+@order glibc.malloc.trim_threshold
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+@order glibc.malloc.perturb
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+@order glibc.cpu.x86_shared_cache_size
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+@order glibc.elision.tries
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+@order glibc.elision.enable
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+@order glibc.cpu.x86_rep_movsb_threshold
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+@order glibc.malloc.mxfast
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+@order glibc.elision.skip_lock_busy
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+@order glibc.malloc.top_pad
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+@order glibc.cpu.x86_rep_stosb_threshold
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+@order glibc.cpu.x86_non_temporal_threshold
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+@order glibc.cpu.x86_shstk
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+@order glibc.cpu.hwcap_mask
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+@order glibc.malloc.mmap_max
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+@order glibc.elision.skip_trylock_internal_abort
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+@order glibc.malloc.tcache_unsorted_limit
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+@order glibc.cpu.x86_ibt
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+@order glibc.cpu.hwcaps
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+@order glibc.elision.skip_lock_internal_abort
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+@order glibc.malloc.arena_max
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+@order glibc.malloc.mmap_threshold
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+@order glibc.cpu.x86_data_cache_size
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+@order glibc.malloc.tcache_count
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+@order glibc.malloc.arena_test
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+@order glibc.rtld.optional_static_tls
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+@order glibc.malloc.tcache_max
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+@order glibc.malloc.check
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+
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+# Tunables added in RHEL 8.8.0
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+@order glibc.rtld.dynamic_sort
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diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/dl-tunables.list b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/dl-tunables.list
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new file mode 100644
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index 0000000000000000..ee1e6fca95e1f2da
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/dl-tunables.list
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@@ -0,0 +1,26 @@
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+# Order of tunables in RHEL 8.7.0.
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+@order glibc.rtld.nns
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+@order glibc.elision.skip_lock_after_retries
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+@order glibc.malloc.trim_threshold
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+@order glibc.malloc.perturb
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+@order glibc.elision.tries
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+@order glibc.elision.enable
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+@order glibc.malloc.mxfast
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+@order glibc.elision.skip_lock_busy
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+@order glibc.malloc.top_pad
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+@order glibc.cpu.hwcap_mask
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+@order glibc.malloc.mmap_max
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+@order glibc.elision.skip_trylock_internal_abort
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+@order glibc.malloc.tcache_unsorted_limit
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+@order glibc.elision.skip_lock_internal_abort
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+@order glibc.malloc.arena_max
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+@order glibc.malloc.mmap_threshold
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+@order glibc.cpu.cached_memopt
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+@order glibc.malloc.tcache_count
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+@order glibc.malloc.arena_test
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+@order glibc.rtld.optional_static_tls
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+@order glibc.malloc.tcache_max
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+@order glibc.malloc.check
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+
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+# Tunables added in RHEL 8.8.0
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+@order glibc.rtld.dynamic_sort
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diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/dl-tunables.list b/sysdeps/unix/sysv/linux/s390/s390-64/dl-tunables.list
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new file mode 100644
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index 0000000000000000..099e28d8f8e67944
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/s390/s390-64/dl-tunables.list
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@@ -0,0 +1,25 @@
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+# Order of tunables in RHEL 8.7.0.
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+@order glibc.rtld.nns
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+@order glibc.elision.skip_lock_after_retries
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+@order glibc.malloc.trim_threshold
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+@order glibc.malloc.perturb
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+@order glibc.elision.tries
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+@order glibc.elision.enable
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+@order glibc.malloc.mxfast
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+@order glibc.elision.skip_lock_busy
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+@order glibc.malloc.top_pad
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+@order glibc.cpu.hwcap_mask
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+@order glibc.malloc.mmap_max
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+@order glibc.elision.skip_trylock_internal_abort
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+@order glibc.malloc.tcache_unsorted_limit
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+@order glibc.elision.skip_lock_internal_abort
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+@order glibc.malloc.arena_max
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+@order glibc.malloc.mmap_threshold
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+@order glibc.malloc.tcache_count
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+@order glibc.malloc.arena_test
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+@order glibc.rtld.optional_static_tls
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+@order glibc.malloc.tcache_max
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+@order glibc.malloc.check
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+
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+# Tunables added in RHEL 8.8.0
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+@order glibc.rtld.dynamic_sort
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diff --git a/sysdeps/unix/sysv/linux/x86_64/64/dl-tunables.list b/sysdeps/unix/sysv/linux/x86_64/64/dl-tunables.list
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new file mode 100644
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index 0000000000000000..b9cad4af62d9f2e5
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/x86_64/64/dl-tunables.list
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@@ -0,0 +1,33 @@
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+# Order of tunables in RHEL 8.7.0.
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+@order glibc.rtld.nns
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+@order glibc.elision.skip_lock_after_retries
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+@order glibc.malloc.trim_threshold
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+@order glibc.malloc.perturb
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+@order glibc.cpu.x86_shared_cache_size
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+@order glibc.elision.tries
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+@order glibc.elision.enable
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+@order glibc.cpu.x86_rep_movsb_threshold
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+@order glibc.malloc.mxfast
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+@order glibc.elision.skip_lock_busy
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+@order glibc.malloc.top_pad
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+@order glibc.cpu.x86_rep_stosb_threshold
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+@order glibc.cpu.x86_non_temporal_threshold
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+@order glibc.cpu.x86_shstk
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+@order glibc.cpu.hwcap_mask
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+@order glibc.malloc.mmap_max
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+@order glibc.elision.skip_trylock_internal_abort
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+@order glibc.malloc.tcache_unsorted_limit
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+@order glibc.cpu.x86_ibt
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+@order glibc.cpu.hwcaps
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+@order glibc.elision.skip_lock_internal_abort
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+@order glibc.malloc.arena_max
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+@order glibc.malloc.mmap_threshold
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+@order glibc.cpu.x86_data_cache_size
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+@order glibc.malloc.tcache_count
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+@order glibc.malloc.arena_test
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+@order glibc.rtld.optional_static_tls
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+@order glibc.malloc.tcache_max
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+@order glibc.malloc.check
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+
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+# Tunables added in RHEL 8.8.0
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+@order glibc.rtld.dynamic_sort
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