Commit bf6f5467 authored by kfazi's avatar kfazi Committed by Brad King
Browse files

Fix allocation in CROSSCOMPILING_EMULATOR evaluation

In commit fec441ec (Teach CROSSCOMPILING_EMULATOR to support
arguments, 2019-05-30, v3.15.0-rc1~6^2) the new member
`cmCustomCommandGenerator::EmulatorsWithArguments` was not initialized
to the proper size.  Fix this and add a test case covering the crash
that could occur with multiple commands where an emulator appears only
in a later command.

Fixes: #19500
Co-Author: Brad King <brad.king@kitware.com>
parent 79bcf4e1
......@@ -25,6 +25,7 @@ cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
, OldStyle(cc.GetEscapeOldStyle())
, MakeVars(cc.GetEscapeAllowMakeVars())
, GE(new cmGeneratorExpression(cc.GetBacktrace()))
, EmulatorsWithArguments(cc.GetCommandLines().size())
{
const cmCustomCommandLines& cmdlines = this->CC.GetCommandLines();
for (cmCustomCommandLine const& cmdline : cmdlines) {
......@@ -107,7 +108,6 @@ void cmCustomCommandGenerator::FillEmulatorsWithArguments()
continue;
}
this->EmulatorsWithArguments.emplace_back();
cmSystemTools::ExpandListArgument(emulator_property,
this->EmulatorsWithArguments[c]);
}
......
......@@ -26,12 +26,14 @@ add_custom_command(OUTPUT output2
# DoesNotUseEmulator: The command will fail if emulator is prepended
add_custom_command(OUTPUT output3
COMMAND ${CMAKE_COMMAND} -E echo generated_exe_emulator_unexpected
COMMAND $<TARGET_FILE:generated_exe_emulator_unexpected>
COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/output3
DEPENDS generated_exe_emulator_unexpected)
# DoesNotUseEmulator: The command will fail if emulator is prepended
add_custom_command(OUTPUT outputImp
COMMAND ${CMAKE_COMMAND} -E echo generated_exe_emulator_unexpected_imported
COMMAND generated_exe_emulator_unexpected_imported
COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/outputImp
)
......@@ -39,6 +41,7 @@ add_custom_command(OUTPUT outputImp
# UsesEmulator: The command only succeeds if the emulator is prepended
# to the command.
add_custom_command(OUTPUT output4
COMMAND ${CMAKE_COMMAND} -E echo generated_exe_emulator_expected
COMMAND generated_exe_emulator_expected
COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/output4
DEPENDS generated_exe_emulator_expected)
......
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