Changes:
Doing this always in precompiled mode meant increased data segment sizes
when CodeSourceMaps are stored, since encoded line/column information is
larger in the LEB-like encoding used. Now we only store column
information when we produce non-symbolic stacks, since the increased
space needed to store the columns is instead in DWARF sections and can
be stripped or elided.
Original description:
Previously, we passed line number information to the stack trace printer
and to DWARF by changing the non-special positions in the CodeSourceMap
to line numbers in precompiled mode. However, doing this lost column
information.
We get the column information back in the majority of cases by encoding
the line number and column information when neither is too large to pack
together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
Otherwise, we just store the line information as before, though due to
using a bit to encode whether column info exists, it's reduced to 30
bits. If the line info is too big for that, we just return kNoSourcePos.
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Change-Id: Ia8baee71468da6100a170fa305d03059ffd17f78
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151822
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
This reverts commit 7c34a80c11.
Reason for revert: This change seems to cause >2% code size regression
in flutter-release mode.
Original change's description:
> [vm/aot] Keep column information when possible for precompiled mode.
>
> Previously, we passed line number information to the stack trace printer
> and to DWARF by changing the non-special positions in the CodeSourceMap
> to line numbers in precompiled mode. However, doing this lost column
> information.
>
> We get the column information back in the majority of cases by encoding
> the line number and column information when neither is too large to pack
> together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
> Otherwise, we just store the line information as before, though due to
> using a bit to encode whether column info exists, it's reduced to 30
> bits. If the line info is too big for that, we just return kNoSourcePos.
>
> Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try
> Change-Id: Id1c826f10871e2f304fa40a59d8b704404d3a2c9
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151507
> Commit-Queue: Tess Strickland <sstrickl@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
TBR=rmacnak@google.com,alexmarkov@google.com,sstrickl@google.com
Change-Id: I5cf97543d1ac2731bb27bdb58ae97af6f22f2cfb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151820
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Previously, we passed line number information to the stack trace printer
and to DWARF by changing the non-special positions in the CodeSourceMap
to line numbers in precompiled mode. However, doing this lost column
information.
We get the column information back in the majority of cases by encoding
the line number and column information when neither is too large to pack
together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
Otherwise, we just store the line information as before, though due to
using a bit to encode whether column info exists, it's reduced to 30
bits. If the line info is too big for that, we just return kNoSourcePos.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try
Change-Id: Id1c826f10871e2f304fa40a59d8b704404d3a2c9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151507
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Now when -v/--verbose is used, we will also print call information
when those calls appear in stubs that do not correspond to Dart code.
The returned information contains the name of the stub (the name of
the static symbol in the ELF file generated for the stub) as well as
the offset of the frame PC within the stub payload.
This change also adds a flag --dump-debug-file-contents that
outputs the parsed information from the file passed via -d/--debug.
Change-Id: Ic52dd6825f2f3564efa3c2c12b46a8bef23d56bc
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/139280
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
We only check the expected stack starting from the call to
foo in main, so we no longer depend on what is captured in
the stacktrace for how main is invoked.
Also removes the old status lines for this test, which are no
longer applicable, and cleans up the documentation a little.
Fixes https://github.com/dart-lang/sdk/issues/39766.
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Change-Id: I66746f5a5169bce425bfd1f01a6a912b062e99c7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128737
Reviewed-by: Teagan Strickland <sstrickl@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Commit-Queue: Samir Jindel <sjindel@google.com>
Note that when generating unstripped ELF snapshots with --obfuscate,
this means DWARF sections in the resulting snapshot will leak
otherwise obfuscated information. To avoid this, use both --strip
to strip the generated snapshot and --save-debugging-info=<...> to
save the unobfuscated DWARF information to a separate file.
Fixes https://github.com/dart-lang/sdk/issues/35563.
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Change-Id: I545a737bd58fcd99c329386a552bd8951acf38b9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128732
Reviewed-by: Martin Kustermann <kustermann@google.com>
REASON: the first commit in the chain contains a change that breaks internal
Flutter roll due to duplicated symbols for type testing stubs in assembly
snapshots.
Revert "[vm/compiler] Add --save-debugging-info flag to gen_snapshot."
This reverts commit c2b6c2e1db.
Revert "[vm] De-obfuscate function and file names in DWARF sections."
This reverts commit 4b8fd3c412.
Revert "[vm] Add docs for DWARF stack traces and related tools/libraries."
This reverts commit 5543e5ceb8.
Revert "[vm] Weaken dwarf_stack_trace expected stack trace."
This reverts commit 5824d3ed53.
Change-Id: I95ecd16fe493f61ae761dabfdd91a6ec0c2f0ca3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128776
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>
We only check the expected stack starting from the call to
foo in main, so we no longer depend on what is captured in
the stacktrace for how main is invoked.
Also removes the old status lines for this test, which are no
longer applicable, and cleans up the documentation a little.
Fixes https://github.com/dart-lang/sdk/issues/39766.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-obfuscate-linux-release-x64-try
Change-Id: I61f0465dcd55d090c49db9c6af503ae9c0df6313
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128401
Reviewed-by: Clement Skau <cskau@google.com>
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Note that when generating unstripped ELF snapshots with --obfuscate,
this means DWARF sections in the resulting snapshot will leak
otherwise obfuscated information. To avoid this, use both --strip
to strip the generated snapshot and --save-debugging-info=<...> to
save the unobfuscated DWARF information to a separate file.
Fixes https://github.com/dart-lang/sdk/issues/35563.
Change-Id: I8795e2a5623ad5fc5362257007f677e622a7700b
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Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127166
Commit-Queue: Teagan Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Tess Strickland